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Convert between units of length, weight, temperature, area, volume, speed, data, and time. Results update as you type.
Convert any unit of measurement instantly. Length, weight, temperature, area, volume, speed, data storage, and time — all in one tool. Results update in real time as you type. No signup, no server, no tracking. Everything runs in your browser with pure JavaScript math.
Select a category (length, weight, temperature, etc.), enter a number, choose your "from" and "to" units, and the result appears instantly. You can also use the swap button to reverse the conversion.
The converter supports 8 categories: Length (mm to miles), Weight (mg to tons), Temperature (Celsius, Fahrenheit, Kelvin), Area (mm squared to hectares), Volume (ml to cubic meters), Speed (m/s to knots), Data (bytes to petabytes), and Time (milliseconds to years).
Yes. All conversions use standard mathematical formulas and precise conversion factors. Temperature conversions use the exact formulas (not approximations). Results show up to 8 significant digits for precision.
Yes. The converter runs entirely in your browser with pure JavaScript — no data is sent to any server, no signup required, and no usage limits. Completely free forever.