Unit conversion glossary: measurements, units & formulas

Acceleration Converter converts acceleration units — m/s², ft/s², g (standard gravity), and gal — for physics and vehicle data.

Angle Converter converts angle units — degrees, radians, gradians, arcminutes, arcseconds, and revolutions.

Area Converter converts sq ft, sq meters, acres, and hectares.

Battery Capacity Converter converts battery capacity between mAh, Ah, and watt-hours using the pack voltage, and estimates run time from a load.

Cooking Temperature Converter converts oven temperature between Fahrenheit, Celsius, and UK gas marks, with fan/convection adjustment and a reference table.

Currency Converter converts 40 world currencies using approximate exchange rates.

Data Storage Converter converts bytes, KB, MB, GB, TB, and PB.

Data Transfer Rate Converter converts data transfer rate units — bit/s, kbit/s, Mbit/s, Gbit/s, and byte-per-second equivalents — and estimates download time.

Density Converter converts units of density — kg/m³, g/cm³, g/mL, lb/ft³, and lb/gal — for any material.

Dimensional Analysis converts units step-by-step using the factor-label method with visual unit cancellation.

Electric Charge Converter converts electric charge between coulombs, milliamp-hours, amp-hours, faradays, and elementary charges.

Energy Converter converts joules, calories, BTU, kWh, and eV.

Add, subtract, multiply, or divide measurements in feet, inches, and fractions, with decimal feet and metric conversions.

Flow Rate Converter converts volumetric flow rate units — GPM, liters per minute, cubic meters per hour, CFM, and more.

Force Converter converts units of force — newtons, kilonewtons, pound-force, kilogram-force, and dynes.

Frequency Converter converts frequency units — hertz, kilohertz, megahertz, gigahertz, RPM, and radians per second.

Fuel Efficiency Converter converts fuel economy between MPG, L/100km, and km/L instantly.

Illuminance Converter converts illuminance units — lux, foot-candles, phot, and lumens per square meter — for lighting design.

Kinematic Viscosity Converter converts kinematic viscosity between m²/s, stokes, centistokes, and ft²/s, and relate it to dynamic viscosity via density.

Length Converter converts meters, feet, inches, miles, and more.

Luminous Flux Converter converts luminous flux between lumens and sub-multiples, and relate lumens to lux (via area) and to watts (via luminous efficacy).

Magnetic Field Converter converts magnetic flux density between tesla, gauss, millitesla, microtesla, and their sub-multiples.

Metric Prefix Converter converts a value between metric (SI) prefixes — nano, micro, milli, kilo, mega, giga, and more — with the scientific-notation equivalent.

Number Base Converter converts numbers between binary, octal, decimal, and hex.

Pace Converter converts running pace between min/km, min/mile, km/h, and mph, and finds finish times for common race distances.

Paper Size references paper dimensions for A-series (A0–A6), US Letter, Legal, and Tabloid in mm and inches, and the scale factor between any two sizes.

Power Converter converts units of power — watts, kilowatts, horsepower, BTU/hour, and foot-pounds per second.

Pressure Converter converts across 9 pressure units including PSI, bar, atm, pascal, kPa, MPa, millibar, mmHg, and inHg.

Radiation Dose Converter converts radiation dose units — sieverts, rem, grays, rad, and their sub-multiples — for dosimetry.

Roman Numeral Converter converts decimal numbers to Roman numerals and back. See step-by-step breakdowns for any number 1–3999.

Speed Converter converts across 6 speed units including mph, km/h, knots, m/s, ft/s, and Mach.

Surface Tension Converter converts surface tension between N/m, mN/m, dyn/cm, and other units, with reference values for common liquids.

Temperature Converter converts 8 temperature scales, including Celsius, Fahrenheit, Kelvin, and Rankine.

Thermal Conductivity Converter converts thermal conductivity between W/(m·K), BTU/(hr·ft·°F), and other units, with reference values for common materials.

Time Unit Converter converts units of time — seconds, minutes, hours, days, weeks, months, and years — instantly.

Torque Converter converts torque units — newton-meters, pound-feet, pound-inches, and kilogram-force meters — for tools and engines.

Typing Speed Converter converts typing speed between words per minute (WPM), characters per minute (CPM), and keystrokes per hour, and estimates time to type a document.

Unit Converter converts 200+ units across 11 measurement categories.

Viscosity Converter converts dynamic viscosity units — pascal-seconds, poise, centipoise, and pound-force-second per square foot.

Volume Converter converts across 25 volume units including liters, gallons, cups, milliliters, fluid ounces, cubic meters, dry measures, and imperial units.

Weight Converter converts across 14 weight and mass units including kilograms, pounds, ounces, grams, tons, stones, troy ounces, carats, grains, and slugs.

Weight on Other Planets calculates how much you would weigh on the Moon, Mars, and other planets, from Earth weight and each body's surface gravity.

See Gauge (Wire). The standard system for measuring wire diameter. Lower AWG numbers indicate thicker wires with greater current capacity.