Ready to convert
Enter a value and click Convert// convert any unit in one click
Unit Converter — convert length, weight, temperature, area, volume, speed and more. Browser-based, free, no sign-up required.
Ready to convert
Enter a value and click ConvertChoose from Length, Weight, Temperature, Area, Volume, Speed, Data, Time, Energy or Pressure.
Type the number you want to convert into the Value field.
Pick From / To units and click Convert — all equivalent values are shown instantly.
Unit Converter is a free, browser-based tool that converts values across 10 measurement categories — length, weight, temperature, area, volume, speed, data, time, energy and pressure. No install, no sign-up, all math runs locally in your browser.
Yes, completely free. No sign-up, no account, no ads. Everything runs in your browser.
Length, Weight, Temperature, Area, Volume, Speed, Data, Time, Energy and Pressure — with metric and imperial units for each.
All conversions use standard scientific factors and JavaScript's double-precision floating-point arithmetic, accurate to 10+ significant figures for most everyday use cases.
Yes. The Temperature category supports Celsius, Fahrenheit and Kelvin, with full bidirectional conversion between all three.
All conversion logic runs in your browser with no server calls, so once the page loads it works even without internet.
After converting, the tool also displays the equivalent value in every other unit for that category — so you see all conversions at once.
Clicking ⇄ SWAP instantly exchanges the From and To unit selectors, letting you reverse a conversion without manually changing both dropdowns.
No. You can enter any numeric value, including very large or very small numbers. The tool handles scientific-notation-scale numbers correctly.
Whether you need to convert kilometers to miles, kilograms to pounds, Celsius to Fahrenheit or gigabytes to terabytes, Unit Converter has you covered. Built for developers, students, engineers and everyday users, it runs entirely in your browser with zero dependencies and zero data collection.
Unit Converter covers the most common measurement domains: Length (mm, cm, m, km, in, ft, yd, mi), Weight (mg, g, kg, t, oz, lb), Temperature (°C, °F, K), Area (mm², cm², m², km², in², ft², ac, ha), Volume (ml, l, m³, tsp, tbsp, fl oz, cup, pt, qt, gal), Speed (m/s, km/h, mph, knot, ft/s), Data (b, B, KB, MB, GB, TB, PB), Time (ns, µs, ms, s, min, h, d, wk, mo, yr), Energy (J, kJ, cal, kcal, Wh, kWh, BTU) and Pressure (Pa, kPa, MPa, bar, psi, atm, mmHg).
Unlike apps that require installation or accounts that demand sign-up, a browser-based converter is always available at a single URL. Bookmark it, share it, or open it from any device. The calculation logic is entirely local — your input values never leave your machine.