Unit Converter
Convert length, weight, temperature, area, volume, and time in both directions. Everything happens on your device - nothing is ever uploaded.
Runs entirely on your device - nothing is ever uploaded.
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How to use the unit converter
- Pick a category: length, temperature, area, volume, weight, or time.
- Type a value in the From field and choose its unit. Fractions such as 1/2 work, and 1,000 is read as one thousand.
- The converted value appears instantly. Swap units, edit either side, or copy the result.
What it is for
Homework, cooking, travel, DIY projects, fitness, and science class - anywhere two measurement systems meet. Typical uses: miles to kilometres for a trip, cups to millilitres for a recipe, pounds to kilograms for a workout log, or °F to °C before setting an oven.
How it works
Each unit carries its exact internationally defined factor to a shared base unit (metres, square metres, litres, kilograms, seconds); temperature converts through offset formulas, e.g. °C = (°F − 32) × 5⁄9 and K = °C + 273.15. Results are computed on your device instantly as you type, so nothing you enter leaves the browser.
Worked example
Convert 5 ft 7 in to centimetres: 5 ft = 152.4 cm and 7 in = 17.78 cm, so 5′7″ = 170.18 cm. Or convert 350 °F to °C: (350 − 32) × 5⁄9 = 176.7 °C - the standard 350 °F baking temperature. You can type 5*12+7 or 1/2 in the value field; fractions and comma-grouped thousands are parsed before converting.
Limitations
Conversions use exact definition factors (1 in = 2.54 cm; 1 lb = 0.45359237 kg), displayed rounded to a readable precision - for lab work, re-check the unrounded figure against your required significant figures. Temperature intervals ("a rise of 10 °F") differ from absolute temperatures and need separate handling. For currency, which changes daily, use a live rate source rather than a fixed converter. Related tools: Temperature Converter for a focused temperature page, Speed Converter for pace and wind, and Fractions Calculator for exact fractional arithmetic.