Scientific Calculator
A full online scientific calculator with trig, logs, powers, roots, parentheses and memory. Free, keyboard-friendly and works on any device.
About the Scientific Calculator
This free online scientific calculator handles everything a handheld model does: arithmetic, parentheses, powers and roots, trigonometry, logarithms, exponentials, factorials and constants like π and e. Type an expression or use the button grid, and get an accurate result instantly — no app to install and no hardware to carry.
It respects the correct order of operations, so 2 + 3 × 4 gives 14, not 20, and supports nested parentheses for complex expressions. Trigonometric functions work in your chosen mode (degrees or radians), and a memory feature lets you store and recall a running value across calculations.
Students, engineers, scientists and anyone doing more than basic sums use this daily. It evaluates expressions with a safe parser — never the unsafe eval — so your input is handled securely. Everything runs in your browser with no signup.
How to Use the Scientific Calculator
- 1Type a mathematical expression or tap the button grid.
- 2Use parentheses to group operations and ^ for powers.
- 3Switch between degrees and radians for trigonometric functions.
- 4Press equals to evaluate, and use memory keys to store a running total.
Frequently Asked Questions
How does the calculator handle order of operations?
It follows standard precedence (BODMAS/PEMDAS): parentheses first, then powers and roots, then multiplication and division, then addition and subtraction. So 2 + 3 × 4 = 14 because the multiplication happens before the addition.
How do I use trigonometric functions?
Enter sin, cos or tan followed by the angle in parentheses, such as sin(30). Set the mode to degrees for angle measures like 30° and 90°, or radians for values like π/2. The result updates according to the mode you have selected.
What is the difference between degrees and radians?
Both measure angles. A full circle is 360 degrees or 2π radians, so 180° equals π radians. Most everyday problems use degrees; calculus and higher maths use radians. Choosing the wrong mode is the most common source of trig errors, so check the setting.
Is it safe to enter any expression?
Yes. The calculator parses your input with a dedicated maths parser rather than running it as code, so only valid mathematical expressions are evaluated. Invalid input simply shows an error rather than doing anything unexpected.
How do the memory keys work?
Memory lets you keep a value aside while you do other calculations: store the current result, then add to or recall it later. It is handy for summing a column of intermediate answers without writing them down.