Online Calculators
Free online calculators for health, money, education and everyday life — age, BMI, percentage, EMI, SIP, mortgage, pregnancy, GPA, income tax and more.
Age CalculatorCalculate your exact age in years, months and days from your date of birth. Free online age calculator with next-birthday countdown.BMI CalculatorCalculate your Body Mass Index from height and weight (metric or imperial) and see your WHO weight category instantly.Percentage CalculatorFind X% of a number, what percent X is of Y, and percentage increase or decrease — three percentage calculators in one.Date Difference CalculatorCount the days, weeks, months and years between two dates, or add and subtract days from any date.Calorie Calculator (TDEE)Calculate your daily calorie needs (TDEE) and BMR from age, height, weight and activity level — with targets for weight loss and gain.GPA & CGPA CalculatorCalculate GPA from grades and credits, and convert CGPA to percentage or percentage to CGPA (10-point and 4-point scales).EMI CalculatorCalculate your monthly EMI, total interest and total payment for home, car and personal loans, with a full amortization view.SIP CalculatorEstimate the future value of your monthly SIP mutual fund investments — invested amount, expected returns and maturity value.Compound Interest CalculatorSee how your money grows with compound interest — choose principal, rate, time and compounding frequency, with a year-by-year breakdown.GST CalculatorAdd or remove GST at 5%, 12%, 18% or 28% (or any custom rate) and see the CGST/SGST split — also works as a VAT calculator.Loan CalculatorWork out monthly payments, total interest and payoff time for any loan amount, interest rate and term.Tip & Discount CalculatorCalculate the tip and split the bill between friends, or find the final price after any discount percentage.Pregnancy Due Date CalculatorCalculate your estimated due date from your last period using Naegele's rule, plus gestational age, trimester and conception date.Ovulation CalculatorFind your ovulation date and fertile window from your last period and cycle length — plus next period and implantation dates.Body Fat CalculatorEstimate your body fat percentage with the US Navy tape method from neck, waist and hip measurements — with ACE category, fat and lean mass.Ideal Weight CalculatorFind your ideal body weight by height and gender using the Devine, Robinson, Miller and Hamwi formulas, plus the BMI-based healthy range.Water Intake CalculatorCalculate how much water you should drink a day from your weight, exercise and climate — daily target in litres and 250 ml glasses.Running Pace CalculatorCalculate running pace, finish time or distance — enter any two and get the third, with 5K, 10K, half and full marathon splits.Mortgage CalculatorCalculate your monthly mortgage payment from home price, down payment, rate and term — with property tax, insurance and total interest.Salary to Hourly CalculatorConvert annual salary to hourly rate — or hourly to yearly — with monthly, biweekly, weekly and daily pay based on your real working hours.Income Tax Calculator (India, FY 2025-26)Calculate income tax for FY 2025-26 (AY 2026-27) under the new and old regimes — slab-wise breakdown, 87A rebate, cess and monthly in-hand.Inflation CalculatorSee what inflation does to your money — future cost of today's amount and today's purchasing power of a future sum, year by year.FD CalculatorCalculate fixed deposit maturity amount and interest earned with quarterly compounding — works for SBI, HDFC, ICICI, Post Office and all bank FDs.RD CalculatorCalculate recurring deposit maturity value, total deposits and interest earned using the standard quarterly-compounding RD formula used by Indian banks.PPF CalculatorCalculate PPF maturity value, interest and year-by-year balance for 15–50 years at the current 7.1% rate. Tax-free returns with Section 80C benefit.Margin CalculatorCalculate profit margin and markup from cost and selling price, or find the right selling price from cost and desired margin percentage.PayPal Fee CalculatorCalculate PayPal fees for domestic and international payments, see what you'll receive, and find how much to invoice to receive a target amount.Zakat CalculatorCalculate zakat at 2.5% on cash, gold, silver, investments and business assets minus debts, with nisab threshold check (87.48g gold / 612.36g silver).Average CalculatorFind the mean, median, mode, range, sum, min, max and geometric mean of any list of numbers — paste comma, space or newline separated values.Standard Deviation CalculatorCalculate sample and population standard deviation, variance and mean from a data set, with the formula and calculation steps explained.Fraction CalculatorAdd, subtract, multiply and divide fractions with results simplified to lowest terms, shown as mixed numbers and decimals. Includes a fraction simplifier.Ratio CalculatorSimplify ratios to lowest terms, solve proportions (A:B = C:X) for any missing value, and scale ratios up or down by any factor.LCM & HCF CalculatorFind the LCM and HCF (GCD) of two or more numbers instantly, with prime factorization shown for up to 4 numbers to explain the answer.Quadratic Equation SolverSolve ax² + bx + c = 0 instantly — real or complex roots, discriminant, vertex and factored form, with the quadratic formula steps explained.Salary Tax Calculator Pakistan (2026-27)Calculate income tax on your monthly salary in Pakistan for FY 2026-2027 — see monthly take-home pay, or work backwards from take-home to gross salary.Break-Even CalculatorFind how many units you must sell to cover fixed and variable costs. Free break-even calculator with contribution margin and margin of safety.CAGR CalculatorCalculate compound annual growth rate from initial value, final value and years. Free CAGR calculator with year-by-year growth table and reverse mode.Circle CalculatorEnter any one circle measurement — radius, diameter, circumference or area — and get the other three instantly, with all formulas shown.Debt-to-Income Ratio CalculatorCalculate your front-end and back-end DTI ratio from monthly income and debt payments. See instantly if your debt level is good, ok or too high.Decimal to Fraction CalculatorConvert any decimal to a simplified fraction and mixed number with step-by-step working, including repeating decimals like 0.333... and 0.1666...Fraction to Decimal CalculatorConvert any fraction to a decimal and percentage. Detects repeating decimals and shows the recurring pattern, e.g. 1/6 = 0.1(6) = 16.67%.Marks Percentage CalculatorCalculate exam percentage from obtained and total marks, with subject-wise totals and grade bands used by Pakistani boards. Free and instant.Protein Intake CalculatorFind your daily protein target in grams from body weight, activity level and goal — maintain, build muscle or lose fat — with a per-meal split.Pythagorean Theorem CalculatorSolve a right triangle from any two sides using a² + b² = c². Get the missing side, area, perimeter and angles instantly, with the check shown.Simple Interest CalculatorCalculate simple interest with SI = P×R×T/100. Get total amount, a monthly breakdown table and a comparison against compound interest.Slope CalculatorFind the slope between two points plus the line equation y = mx + b, angle, distance and intercepts. Handles vertical lines correctly.Square Root CalculatorCalculate square roots and cube roots with simplified radical form (√48 = 4√3), perfect-square detection and a nearby perfect squares table.Stock Average CalculatorCalculate your average share cost across multiple buys, and preview your new average before buying more. Works with PSX, NSE, US stocks and crypto.Test Score CalculatorConvert correct answers into a percentage and letter grade, and see how many questions you can still miss to keep your target grade.Weighted Average CalculatorCalculate a weighted average from values and weights — grades with credit hours, portfolio returns, weighted marks — and compare it to the simple mean.Calorie Deficit CalculatorFree calorie deficit calculator: enter maintenance calories, weight-loss goal and timeframe to get your daily calorie target and safe pace. No signup.Probability CalculatorFree probability calculator for single and combined events. Get probability, complement and odds from favorable outcomes or two event probabilities.Right Triangle CalculatorSolve a right triangle from any two known values — two legs, a leg and hypotenuse, or a side and angle. Get all sides, angles, area and perimeter free.Sample Size CalculatorFree sample size calculator for surveys and studies. Set confidence level, margin of error and population to get the required sample size instantly.Triangle CalculatorFree triangle calculator: solve any triangle from SSS, SAS or ASA inputs. Get missing sides, angles, area, perimeter and height instantly online.APY CalculatorFree APY calculator: convert a nominal interest rate and compounding frequency into annual percentage yield, plus one-year earnings on your deposit.BMR CalculatorFree BMR calculator using Mifflin-St Jeor, Harris-Benedict and Katch-McArdle formulas, with a daily calorie (TDEE) table for every activity level.Body Surface Area CalculatorFree BSA calculator: compute body surface area from height and weight with the Mosteller, Du Bois, Haycock and Gehan-George formulas, plus the average.CPC CalculatorFree CPC calculator: get cost per click from spend and clicks, or solve for budget or clicks from a target CPC. Instant, any currency, no signup.CPM CalculatorFree CPM calculator: find cost per 1,000 impressions, or solve for total budget or impressions from a known CPM. Instant results, any currency.CTR CalculatorFree CTR calculator: divide clicks by impressions to get click-through rate with a benchmark band showing how your ads or listings compare.Carbohydrate Intake CalculatorFree carbohydrate intake calculator: turn daily calories and a goal into grams of carbs per day, with the 45-65% guideline range shown alongside.Child Height PredictorFree child height predictor using the mid-parental method: enter both parents' heights to estimate a boy's or girl's adult height with a likely range.Cube Root CalculatorFree cube root calculator: get the decimal cube root of any number, check perfect cubes and see the simplified radical form like ∛54 = 3∛2.Customer Acquisition Cost CalculatorFree CAC calculator: divide marketing plus sales spend by new customers to get acquisition cost, and compare channels side by side to find the cheapest.Distance Formula CalculatorFree distance formula calculator: enter two coordinate points to get the distance with every substitution step shown, plus Δx, Δy and the slope.Emergency Fund CalculatorFree emergency fund calculator: total your essential monthly expenses, pick months of cover and see your savings target, gap and time to reach it.Exponent CalculatorFree exponent calculator: raise any base to any power, including negative and fractional exponents, with the expanded multiplication shown.Factorial CalculatorFree factorial calculator with exact big-integer results up to 1000!. See the expanded multiplication, digit count and scientific notation instantly.Fat Intake CalculatorFree fat intake calculator: convert daily calories and a fat percentage into grams of fat per day, with the 20-35% guideline table and saturated-fat cap.Final Grade CalculatorFree final grade calculator: enter your current grade, the exam weight and target grade to see the exact final exam score you need — plus a what-if table.Geometric Mean CalculatorFree geometric mean calculator: paste a list of positive values to get the n-th root of their product, with steps and the arithmetic mean for comparison.Harmonic Mean CalculatorFree harmonic mean calculator: enter positive values to get n divided by the sum of reciprocals, with steps and the AM-GM-HM comparison shown.Heart Rate Zone CalculatorFree heart rate zone calculator: get all five training zones in bpm from your age or measured max HR, using percent-of-max or the Karvonen method.Inventory Turnover CalculatorFree inventory turnover calculator: divide COGS by average inventory to get the turnover ratio and days inventory outstanding (DIO) for any period.Midpoint CalculatorFree midpoint calculator: enter two coordinate points to get the exact midpoint with formula steps shown, plus the distance between the points.Modulo CalculatorCalculate a mod b with the quotient and remainder shown step by step. Handles negative numbers with both floored and truncated results. Free, no signup.Percentage Error CalculatorCalculate percentage error from observed and true values with the formula |observed − true| ÷ |true| × 100. See absolute and relative error instantly.Prime Factorization CalculatorFind the prime factorization of any integer up to 12 digits — exponent form like 360 = 2³ × 3² × 5, the full factor list, and a prime check. Free.Prime Number CheckerCheck whether any number up to 12 digits is prime. Composite numbers show the smallest factor and a factor pair, plus the nearest primes either side.ROI CalculatorCalculate return on investment from cost and gain — ROI percentage, net profit and annualized ROI with calculation steps shown. Free, instant, no signup.Risk Reward CalculatorCalculate the risk-to-reward ratio of a trade from entry, stop-loss and target prices, plus the breakeven win rate and money at risk per position.Rounding CalculatorRound any number to decimal places, significant figures or the nearest multiple. See round half-up, floor and ceiling side by side with an explanation.Sales Tax CalculatorAdd sales tax to a price or back it out of a tax-inclusive total. Editable rate with Pakistan's 18% GST as default, plus a common-rates comparison table.VAT CalculatorAdd or remove VAT and see the net, VAT and gross amounts instantly. Editable rate (20% default), reverse VAT formula shown, common rates compared.Waist-to-Height Ratio CalculatorCalculate your waist-to-height ratio (WHtR) in cm or inches and see your health risk band. Simple rule: keep your waist under half your height.Waist-to-Hip Ratio CalculatorCalculate your waist-to-hip ratio (WHR) and see your WHO risk category by gender. Works in cm or inches with a clear reference chart. Free, no signup.Z Score CalculatorCalculate a z-score from a value, mean and standard deviation — with percentile, probability and interpretation from the standard normal distribution.Area CalculatorCalculate the area of a rectangle, circle, triangle, trapezoid, parallelogram or ellipse — with the formula and substituted working shown for each shape.Auto Loan CalculatorCalculate your monthly car loan payment, total interest and year-by-year amortization from vehicle price, down payment, rate and term. Free, no signup.Budget CalculatorCompare monthly income with expenses by category — see your surplus or deficit, savings rate and where every rupee goes. Free budget planner, no signup.Caffeine CalculatorAdd up your daily caffeine from coffee, chai, cola and energy drinks, compare it to the 400 mg guideline, and see how long it stays in your body.Calories Burned CalculatorEstimate calories burned by walking, running, cycling, cricket and more using MET values, your weight and duration. Compare activities side by side.Cash Flow CalculatorCalculate net cash flow from itemized inflows and outflows — monthly or annual — with each line's share and a clear positive/negative verdict. Free.Credit Card Payoff CalculatorSee how long it takes to pay off a credit-card balance, the payoff date and total interest — and how much an extra monthly payment saves. Free tool.Customer Lifetime Value CalculatorEstimate customer lifetime value from average order, purchase frequency, margin and lifespan — with a sensitivity table and CLV-to-CAC guidance. Free.Determinant CalculatorCalculate the determinant of a 2×2, 3×3 or 4×4 matrix instantly, with the ad − bc or Sarrus expansion shown and a singular-matrix check. Free tool.Freelance Rate CalculatorConvert your income goal, expenses, taxes and real billable hours into the minimum hourly rate you must charge — plus day rate and project pricing.Grade CalculatorCalculate your course grade from assignment scores and category weights — weighted percentage, letter grade and each category's contribution. Free.Home Affordability CalculatorEstimate the maximum home price you can afford from income, debts, down payment, rate and term — using the standard 28/36 lending rule. Free tool.Macro CalculatorTurn your daily calorie target into protein, carb and fat grams with balanced, high-protein, low-carb, keto or custom splits. Per-meal grams included.Mortgage Payoff CalculatorSee how extra monthly mortgage payments shorten your payoff date and how much interest you save — free, instant and private.Outlier CalculatorFind outliers in any data set using the IQR rule (Tukey's fences) or z-scores. Paste your numbers and get bounds and flagged values instantly.Payback Period CalculatorCalculate the simple and discounted payback period of an investment from its cash flows, with a year-by-year cumulative table and NPV.Percentile CalculatorFind any percentile of a data set or the percentile rank of a value. Uses Excel-compatible linear interpolation with quartiles shown alongside.Personal Loan CalculatorCalculate your personal loan monthly payment, total interest and true APR including origination fees — free, instant and private.Profit and Loss CalculatorBuild a quick profit and loss statement from revenue, COGS and expenses — with gross, operating and net profit plus margins for each.Quartile CalculatorCalculate Q1, median, Q3, IQR and the full five-number summary of any data set instantly, with Tukey fences for outlier checks.Significant Figures CalculatorCount significant figures, round any number to N sig figs, or multiply and divide with proper sig-fig rules — with the rule explained each time.Sleep Debt CalculatorAdd up your sleep debt from a week of nights versus your target, and get a realistic recovery plan of extra sleep per night.Volume CalculatorCalculate the volume of a cube, box, sphere, cylinder, cone or pyramid from its dimensions, with the exact formula shown for each shape.Weight Loss CalculatorProject how long it will take to reach your target weight from your daily calorie deficit, with weekly loss rate and estimated goal date.Matrix CalculatorAdd, subtract and multiply matrices, or compute the determinant, inverse and transpose — up to 8×8, with results you can copy.Combination CalculatorCalculate nCr — the number of ways to choose r items from n when order doesn't matter — with exact big-number results and formula steps.Commission CalculatorCalculate commission earnings from sales and rate, add an optional base salary, and see total pay and your effective rate on sales.Conversion Rate CalculatorCalculate your conversion rate from visitors and conversions, and see how many conversions you need to hit a target rate.Dividend Yield CalculatorCalculate dividend yield from share price and annual dividend, plus your expected annual and monthly income from the shares you own.Lean Body Mass CalculatorEstimate lean body mass with the Boer, James and Hume equations from sex, height and weight — with estimated fat mass and body fat percent.Log CalculatorCalculate logarithms in base 10, base e (ln), base 2 or any custom base, with change-of-base working shown step by step.One Rep Max CalculatorEstimate your one-rep max from any set using Epley, Brzycki, Lombardi and O'Conner formulas, plus a training percentage table.Permutation CalculatorCalculate nPr — the number of ordered arrangements of r items from n — with exact big-number results and formula steps shown.ROAS CalculatorCalculate return on ad spend as a multiple and percentage, plus your break-even ROAS from gross margin — free and instant.Rental Yield CalculatorCalculate gross and net rental yield from property value, rent and running costs — plus cash-on-cash return on your actual deposit.Stripe Fee CalculatorEstimate Stripe or any payment processor's fees, see what you'll actually receive, and reverse-calculate what to charge to net a target amount.Target Heart Rate CalculatorCalculate your five heart-rate training zones by age using the Karvonen method or simple percentage of maximum heart rate.Weighted Grade CalculatorCalculate your weighted course grade from category scores and weights, with warnings when weights don't add up to 100%.APR CalculatorCalculate the true annual percentage rate on a loan including fees. Free APR calculator showing total cost, monthly payment and the fee impact.Annuity CalculatorCalculate the present or future value of a stream of regular payments. Free annuity calculator supporting ordinary annuities and annuities due.Confidence Interval CalculatorCalculate a confidence interval for a mean or proportion. Free tool showing the margin of error, critical value and interval bounds with steps.Correlation CalculatorCalculate the Pearson correlation coefficient for paired data. Free tool showing r, r-squared, strength and direction with the covariance steps.Depreciation CalculatorCalculate straight-line or declining-balance depreciation with a full year-by-year book value schedule. Free asset depreciation calculator.Forex Pip CalculatorCalculate the value of a pip for any forex position size. Free pip calculator showing pip value per lot and the profit or loss on a move.Future Value CalculatorCalculate the future value of a lump sum plus regular contributions. Free FV calculator showing growth, total contributed and interest earned.Interest Rate CalculatorSolve for the implied interest rate from principal, payment and term. Free tool that finds the rate a loan or investment is really charging you.Linear Regression CalculatorFit a least-squares line to paired data. Free linear regression calculator giving slope, intercept, r-squared, the equation and predictions.Loan Payoff CalculatorSee how extra payments shorten your loan and cut interest. Free loan payoff calculator showing months saved, interest saved and the payoff date.Margin of Error CalculatorCalculate the margin of error for a survey mean or proportion. Free tool showing the critical value, standard error and confidence interval.Mixed Number CalculatorAdd, subtract, multiply and divide mixed numbers and fractions. Free mixed number calculator showing the simplified result, improper fraction and decimal.NPV CalculatorCalculate net present value for a series of cash flows. Free NPV calculator discounting each period and showing whether a project adds value.Net Worth CalculatorAdd up assets and subtract liabilities to find your net worth. Free net worth calculator with editable rows and an asset-versus-debt summary.Position Size CalculatorCalculate trade size from account risk and stop-loss distance. Free position size calculator showing shares to buy and money at risk.Pregnancy Conception CalculatorEstimate your conception date from a due date or last menstrual period. Free conception calculator with the fertile window and gestational age.Pregnancy Weight Gain CalculatorSee your recommended pregnancy weight-gain range by pre-pregnancy BMI and week. Free tool comparing your progress to the guideline range.Present Value CalculatorCalculate what future money is worth today. Free present value calculator discounting a future amount at your chosen rate over any period.Savings Goal CalculatorFind the monthly saving needed to reach a target by a deadline. Free savings goal calculator that factors in current savings and expected return.Steps to Calories CalculatorEstimate calories burned from your step count using weight, height and pace. Free steps to calories calculator that also shows distance walked.Surface Area CalculatorCalculate the surface area of a cube, sphere, cylinder, cone and more. Free surface area calculator showing the formula used for each solid.APA Citation GeneratorGenerate APA 7th edition references and in-text citations for books, websites and journals. Free APA citation generator with copy button.Graphing CalculatorPlot y = f(x) on an interactive graph. Free online graphing calculator supporting trig, powers, logs and adjustable x and y ranges.MLA Citation GeneratorGenerate MLA 9th edition works-cited entries and in-text citations for books, websites and journals. Free MLA citation generator with copy button.Rent vs Buy CalculatorCompare the long-term cost of renting versus buying a home. Free rent vs buy calculator showing total costs and the break-even year.Retirement CalculatorProject your retirement savings and see if you are on track. Free retirement calculator showing your future balance, shortfall and target contribution.Scientific CalculatorA full online scientific calculator with trig, logs, powers, roots, parentheses and memory. Free, keyboard-friendly and works on any device.IRR CalculatorCalculate the internal rate of return for a series of cash flows. Free IRR calculator that finds the rate where NPV equals zero.Chicago Citation GeneratorGenerate Chicago-style bibliography entries and notes for books, websites and journals. Free Chicago citation generator with copy button.Debt Snowball CalculatorBuild a payoff plan using the snowball or avalanche method. Free debt snowball calculator showing your debt-free date and total interest.