📐Unit Converters
Free unit converters for length, weight, temperature, area, speed, volume and digital storage. Precise, internationally-defined conversions, instantly.
📏 Length Converter Free length converter for metres, kilometres, miles, feet, inches, centimetres and more. Convert between metric and imperial units instantly. 🌡️ Temperature Converter Free temperature converter for Celsius, Fahrenheit and Kelvin. Convert C to F, F to C and C to K instantly, with the exact formulas and a handy reference chart. ⚖️ Weight Converter Free weight converter for kg to lbs, pounds to kg, grams to ounces and stone to pounds. Switch between metric and imperial mass units with exact factors. 📐 Angle Converter Free angle converter for degrees to radians, gradians, arcminutes, arcseconds and revolutions. Type in any field and every other unit updates instantly. 📐 Area Converter Free area converter for square feet to square meters, acres to hectares, and more. Type in any unit and the rest update instantly using exact conversion factors. 🥄 Cooking Measurement Converter Free cooking measurement converter. Switch between cups, tablespoons, teaspoons, fluid ounces, pints, quarts, ml and litres instantly. US customary units. 💾 Data Storage Converter Free data storage converter for bits, bytes, KB, MB, GB, TB and PB. Convert MB to GB or bytes to KB instantly, with both decimal (1000) and binary (1024) units. 📶 Data Transfer Rate Converter Free data transfer rate converter: turn Mbps to MB/s, kbps, Gbps and bytes per second instantly. Convert any bandwidth or download speed unit accurately. 🧪 Density Converter Free density converter for kg/m³, g/cm³, g/ml, lb/ft³, and lb/in³. Type a value in any field and every other unit updates instantly with no rounding fuss. ⚡ Energy Converter Free energy converter: switch between joules, kilojoules, calories, kilocalories, watt-hours, kWh, BTU, electronvolts and foot-pounds. Type once to update all. 🪝 Force Converter Free force converter for newtons, kilonewtons, dyne, kgf, lbf and ozf. Convert newtons to pounds-force or kgf to N instantly by typing in any one field. 📡 Frequency Converter Free frequency converter for Hz, kHz, MHz, GHz, THz and rpm units. Type any value and every other field updates instantly through hertz. Accurate, no signup. ⛽ Fuel Economy Converter Free fuel economy converter for MPG (US), MPG (UK), L/100km, and km/L. Type any value to see the rest instantly, with worked examples and reference charts. 💡 Illuminance Converter Free illuminance converter: switch between lux and foot-candles instantly. 1 foot-candle equals 10.7639 lux. Convert lux, fc, phot and kilolux online. ⚡ Power Converter Free power converter for watts, kilowatts, megawatts, horsepower, metric horsepower, BTU per hour and ft-lb/s. Type any field and the rest update instantly. 🌡️ Pressure Converter Free pressure converter for psi to bar, pascal to psi, kPa, atm and mmHg (torr). Type in any field and every other unit updates instantly, all in your browser. 💍 Ring Size Converter Free ring size converter: convert between US, UK, EU ring sizes plus inner diameter and circumference in mm using an accurate built-in ring size chart. 🏛️ Roman Numeral Converter Free Roman numeral converter. Turn any number from 1 to 3999 into Roman numerals, or convert Roman numerals back to a number, with instant two-way validation. 👟 Shoe Size Converter Free shoe size converter for men and women: convert US to EU, UK and CM foot length using standard size charts to quickly find your fit across brands. 🚀 Speed Converter Free speed converter for mph, km/h, knots, m/s and ft/s. Type in any field and every other unit updates instantly using exact, standard conversion factors. ⏱️ Time Converter Free time converter: switch between milliseconds, seconds, minutes, hours, days, weeks, and years. Type in any field and every other unit updates instantly. 🛞 Tire Size Calculator Free tire size calculator: enter width, aspect ratio and rim to get diameter, sidewall, circumference and revs per mile or km, plus a speedometer comparison. 🔧 Torque Converter Free torque converter: switch between N·m, kN·m, ft·lb, in·lb and kgf·m. Type any value and every other unit updates instantly using exact conversion factors. 🧪 Volume Converter Free volume converter for liters to gallons, ml to cups, tablespoons and fluid ounces. Type in any unit and the rest update instantly with exact US factors. 🔌 Wire Gauge Converter Free wire gauge converter: turn any AWG number into conductor diameter in mm and inches plus cross-section area, or measure a wire to find its nearest gauge.
Metric or imperial, the right conversion should be exact, not a rough guess. Our converters use the internationally-defined factors, such as 1 inch being exactly 2.54 cm, so the only rounding is the precision you choose.
Type a value in any unit and every other unit updates at once. Pick a converter below to get started.