Conversions calculators
Fast, accurate unit and measurement converters — length, weight, temperature, volume and beyond.
Area Converter
Free area converter between metric (mm², cm², m², ha, km²) and imperial (in², ft², yd², acre, mi²). Uses exact international definitions. Works in your browser.
Data Storage Converter (KB, MB, GB, TB, KiB, MiB…)
Free digital storage converter — bits, bytes, KB, MB, GB, TB, PB and the binary IEC versions (KiB, MiB, GiB, TiB). Clears up the 1000-vs-1024 confusion.
Length Converter
Free length / distance converter between metric (mm, cm, m, km) and imperial (in, ft, yd, mi) units. Uses the international definitions. Works in your browser.
Speed Converter
Free speed converter — km/h, mph, m/s, knots, ft/s and more. Uses exact conversion factors. Works in your browser.
Temperature Converter
Free temperature converter between Celsius (°C), Fahrenheit (°F) and Kelvin (K). Works in your browser, no sign-up.
Volume Converter
Free volume converter between metric (mL, L, m³) and US / UK customary (fl oz, cup, pint, quart, gallon). Includes US tablespoons and teaspoons. Runs in your browser.
Weight / Mass Converter
Free weight and mass converter between metric (mg, g, kg, t) and imperial (oz, lb) units. Uses the exact international avoirdupois definitions. Works in your browser.