Unit Converter
Convert length, weight, temperature, area, speed and volume — kg to lbs, cm to feet, °C to °F, miles to km and more.
About the Unit Converter
This free unit converter handles six everyday measurement categories: length, weight, temperature, area, speed and volume. Pick a category, choose the from and to units, type a value, and the result appears instantly in both directions — for example "1 kg = 2.2046 lb" and "1 lb = 0.4536 kg" at the same time, so you always see the relationship both ways.
It covers the conversions people search for most: kilograms to pounds, centimetres to feet and inches, Celsius to Fahrenheit, kilometres to miles, litres to gallons, square feet to square metres, acres to hectares and km/h to mph. Linear units convert through exact internationally defined factors (1 inch = 2.54 cm, 1 lb = 0.45359237 kg), while temperature uses the proper formulas rather than a simple multiplier.
Below the result, a quick-reference table shows common values for your selected pair — handy for cooking conversions, travel, shipping weights, fitness tracking and homework. Everything computes live in your browser with up to six decimal places of precision.
How to Use the Unit Converter
- 1Select a category: Length, Weight, Temperature, Area, Speed or Volume.
- 2Choose the unit to convert from and the unit to convert to.
- 3Enter your value — the result updates instantly in both directions.
- 4Use the reference table below for common values of the same pair.
Frequently Asked Questions
What is 1 kg in pounds?
1 kilogram equals about 2.20462 pounds, using the exact definition 1 lb = 0.45359237 kg. Quick references: 5 kg is about 11.02 lb, 10 kg is 22.05 lb, and 70 kg — a common body weight — is roughly 154.3 lb. To go the other way, divide pounds by 2.20462.
How do I convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5 and add 32: °F = °C × 1.8 + 32. So 20 °C is 68 °F, 37 °C (body temperature) is 98.6 °F, and 100 °C is 212 °F. The two scales meet at -40°, where -40 °C equals -40 °F exactly.
How many feet is 170 cm?
170 cm is about 5.577 feet, or 5 feet 6.9 inches — commonly rounded to 5′7″. The conversion uses 1 foot = 30.48 cm exactly. Other common heights: 160 cm is 5′3″, 175 cm is 5′8.9″, and 180 cm is just over 5′10.9″.
How many kilometres is a mile?
1 mile equals exactly 1.609344 kilometres, so 1 km is about 0.6214 miles. For quick mental math, multiply miles by 1.6 to get kilometres: a 5 km run is about 3.11 miles, a 10 km drive is 6.21 miles, and 100 km/h is roughly 62 mph.
How many litres are in a US gallon?
One US gallon is 3.785411784 litres, so a litre is about 0.264 US gallons. Note the imperial (UK) gallon is larger at 4.546 litres — this converter uses US liquid measures for gallons, fluid ounces, cups, tablespoons and teaspoons, the ones found in American recipes and fuel prices.
Are the conversion factors exact?
For length, weight, area, speed and volume, yes — the tool uses the exact factors fixed by the international yard and pound agreement (1 in = 2.54 cm, 1 lb = 0.45359237 kg) and SI definitions. Results are displayed to six decimal places. Temperature conversions use the exact algebraic formulas between Celsius, Fahrenheit and Kelvin.