Unit Converter
Convert between common length, weight, and temperature units instantly — type a value in any field and it converts automatically.
About the Unit Converter
This tool covers the three unit categories people actually convert day to day — length, weight, and temperature — using exact, internationally defined conversion factors rather than rounded approximations, so the numbers stay accurate even at the fourth or fifth decimal place.
The exact factors used
Length: 1 mile = 1,609.344 metres, 1 foot = 0.3048 metres, 1 inch = 0.0254 metres — all exact by international definition, not rounded. Weight: 1 pound = 0.45359237 kilograms, 1 ounce = 0.028349523125 kilograms, also exact international definitions. Temperature uses the standard linear formulas (Fahrenheit = Celsius × 9/5 + 32; Kelvin = Celsius + 273.15) rather than an approximation.
Why exactness matters here
For everyday use a rounded factor is fine, but exact factors matter for anything technical — engineering specs, recipe scaling at volume, or converting a measurement that will itself be used in a further calculation, where small rounding errors compound.
Frequently Asked Questions
What length units are supported?
Meters, kilometers, centimeters, miles, feet, and inches — type a value in any field and every other field updates automatically.
What weight units are supported?
Kilograms, grams, pounds, and ounces, using exact international conversion factors.
How is temperature converted?
Using the standard formulas: Fahrenheit = Celsius × 9/5 + 32, and Kelvin = Celsius + 273.15.