Unit Glossary

Definitions and conversion links for every measurement unit on ChangingUnits.

📏 Length

nanometers nm micrometers μm millimeters mm centimeters cm meters m kilometers km inches in feet ft yards yd miles mi nautical miles nmi light years ly

⚖️ Weight

milligrams mg grams g kilograms kg metric tonnes t ounces oz pounds lb stones st short tons ton troy ounces toz

🌡️ Temperature

Celsius °C Fahrenheit °F Kelvin K Rankine °R

📐 Area

square millimeters mm² square centimeters cm² square meters m² hectares ha square kilometers km² square inches in² square feet ft² square yards yd² acres ac square miles mi²

🧪 Volume

milliliters ml liters L cubic meters m³ teaspoons tsp tablespoons tbsp fluid ounces fl oz cups cup pints pt quarts qt US gallons gal imperial gallons imp gal cubic feet ft³ cubic inches in³

🚀 Speed

meters per second m/s kilometers per hour km/h miles per hour mph feet per second ft/s knots kn mach Ma

⏱️ Time

nanoseconds ns microseconds μs milliseconds ms seconds s minutes min hours hr days day weeks wk months mo years yr

💾 Data

bits bit bytes B kilobytes KB megabytes MB gigabytes GB terabytes TB petabytes PB kibibytes KiB mebibytes MiB gibibytes GiB tebibytes TiB pebibytes PiB

⚡ Energy

joules J kilojoules kJ megajoules MJ calories cal kilocalories kcal watt-hours Wh kilowatt-hours kWh megawatt-hours MWh BTU BTU electronvolts eV foot-pounds ft·lb ergs erg

💨 Pressure

pascals Pa kilopascals kPa megapascals MPa bar bar millibars mbar PSI psi atmospheres atm torr Torr mmHg mmHg inches of mercury inHg inches of water inH₂O

⛽ Fuel Economy

MPG (US) mpg MPG (Imperial) imp mpg Km/L km/L L/100km L/100km

∠ Angles

degrees ° radians rad gradians grad turns turn arcminutes ' arcseconds " milliradians mrad

📈 Frequency

hertz Hz kilohertz kHz megahertz MHz gigahertz GHz terahertz THz RPM rpm revolutions/second rps radians/second rad/s