Unit Converter
A modern, instant unit converter for length, weight, area, volume, temperature, speed, pressure, energy, power, digital storage, fuel economy, and time.
1 m = 3.280839895 ft
1 m in all length units
Type a value, pick two units, and get an instant, accurate conversion. Swap units in one click, save your favorite conversions, and copy the result — all running locally in your browser.
About the Unit Converter
A fast, browser-based converter covering the twelve unit categories people actually use every day: length, weight, area, volume, temperature, speed, pressure, energy, power, digital storage, fuel economy, and time. Every conversion runs instantly as you type, with a one-click swap button, saveable favorites, and a reference table that shows your value in every unit at a glance.
Common use cases
- Translating recipes between metric and US customary units. - Converting shipping weights and package dimensions. - Checking tire pressure in bar vs PSI. - Comparing storage sizes marketed in GB against real MiB on disk. - Estimating fuel economy across US, UK, and EU markets. - Sanity-checking scientific homework and engineering calculations.
Tips for great results
- Use the swap button after a conversion to quickly reverse it. - Save the pairs you use daily as favorites — they persist on this device. - Reference table shows your input in every unit, ideal for quick comparisons. - For temperature, remember that Kelvin and Rankine are absolute scales, so negative Celsius or Fahrenheit values map to positive K / °R. - For fuel economy, higher is better on km/L and MPG, but lower is better on L/100km.
Limitations
- Month and year use 30-day and 365-day averages; calendar-aware date math is outside the scope of this tool. - Fuel economy conversions assume the US gallon unless UK is specified. - CMYK-style device-dependent units are not part of any category here; use the color picker for color conversions. - Extremely large or small numbers are shown in scientific notation to stay readable.
Key features
Length, weight, area, volume, temperature, speed, pressure, energy, power, digital storage, fuel economy, and time — all in one tool.
Results update as you type — no button press, no page reload.
Flip the From and To units and the value comes with it, so you can go back and forth without retyping.
Star the pairs you use most (like °C ↔ °F or kg ↔ lb) and jump to them in one tap.
Copy the converted value with a single click, ready to paste into a doc, spreadsheet, or chat.
See your input expressed in every unit of the current category at a glance.
Optimized for phones, tablets, and desktops with large tap targets and clear typography.
All math happens in your browser. Nothing you type ever leaves your device.