Unit Conversion Calculators
Metric, imperial, US customary — convert between any units in seconds.
Bridging Two Measurement Worlds
The world hasn't fully agreed on units. A recipe calls for grams, your kitchen scale shows ounces. A flight booking shows kilometers, your odometer shows miles. A weather app says 22 °C, you grew up with Fahrenheit. These converters solve the problem instantly, with high-precision factors so you can trust the results.
What's Covered
Length handles meters, kilometers, miles, feet, inches, yards and nautical miles. Weight covers kilograms, grams, pounds, ounces, stones and tonnes. Temperature converts between Celsius, Fahrenheit and Kelvin. Area includes acres, hectares, square meters, square feet and more. Volume works for liters, gallons (US and UK), cups, ounces and milliliters. Speed and time round out the section.
Precision Matters
Conversion factors are defined to at least nine significant digits so rounding errors don't accumulate when you convert through multiple units. For everyday use this is overkill, but for engineering, science and international trade it matters.