Unit Converters

Choose a category, then the units you want to convert. Each conversion page includes a calculator, formula, and worked examples.

Conversion Categories

Length Converter

Convert length and distance units: meters, feet, inches, miles, km, yards, and more.

11 units available

Mass Converter

Convert mass and weight units: kilograms, pounds, ounces, grams, stones, and tons.

10 units available

Temperature Converter

Convert temperature between Celsius, Fahrenheit, Kelvin, and Rankine.

4 units available

Area Converter

Convert area units: sq feet, sq meters, acres, hectares, sq miles, and more.

10 units available

Volume Converter

Convert volume units: liters, gallons, cups, milliliters, fluid ounces, and more.

18 units available

Speed Converter

Convert speed units: mph, km/h, m/s, knots, Mach, and more.

7 units available

Data Storage Converter

Convert decimal and binary data units: bytes, KB, MB, GB, KiB, MiB, GiB, and bits.

16 units available

Time Converter

Convert time units: seconds, minutes, hours, days, weeks, months, and years.

12 units available

Pressure Converter

Convert pressure units: PSI, bar, Pascal, atm, mmHg, and more.

10 units available

Energy Converter

Convert between joules, calories, kilowatt-hours, BTU, and more energy units.

14 units available

Angle Converter

Convert between degrees, radians, gradians, arcminutes, arcseconds, and other angle units.

7 units available

Frequency Converter

Convert between hertz, kilohertz, megahertz, gigahertz, RPM, and other frequency units.

8 units available

Density Converter

Convert between kg/m³, g/cm³, lb/ft³, lb/in³, and other density units.

11 units available

Fuel Economy Converter

Convert between mpg (US/Imperial), L/100km, km/L, and other fuel economy units.

6 units available

Data Transfer Rate Converter

Convert data transfer rate units: bps, Kbps, Mbps, Gbps, KB/s, MB/s, GB/s.

10 units available

Popular Converters

Choose a conversion to see its formula and worked examples.

Feet to Centimetersft to cm Inches to Centimetersin to cm Kilometers to Mileskm to mi Meters to Feetm to ft Pounds to Kilogramslb to kg Ounces to Gramsoz to g Kilograms to Poundskg to lb Fahrenheit to CelsiusF to C Celsius to FahrenheitC to F Celsius to KelvinC to K Gallons to Litersgal to l Cups to Milliliterscup to ml Liters to Gallonsl to gal Miles per Hour to Kilometers per Hourmph to kph Kilometers per Hour to Miles per Hourkph to mph Square Feet to Square Metersft2 to m2 Acres to Hectaresacre to ha Megabytes to GigabytesMB to GB Gigabytes to TerabytesGB to TB Hours to Minutesh to min Days to Hoursd to h PSI to Barpsi to bar Atmospheres to Pascalsatm to Pa Kilocalorie → Kilojoulekcal to kJ Kilowatt-hour → MegajoulekWh to MJ BTU → JouleBTU to J Joule → CalorieJ to cal Degree → Radiandeg to rad Radian → Degreerad to deg Degree → Arcminutedeg to arcmin Hertz → KilohertzHz to kHz Megahertz → GigahertzMHz to GHz RPM → Hertzrpm to Hz g/cm³ → kg/m³g-cm3 to kg-m3 lb/ft³ → kg/m³lb-ft3 to kg-m3 kg/L → kg/m³kg-l to kg-m3 mpg(US) → L/100kmmpg-us to L100km L/100km → mpg(US)L100km to mpg-us mpg → km/Lmpg-us to km-l Megabits per Second to Megabytes per SecondMbps to MB-s Megabytes per Second to Megabits per SecondMB-s to Mbps Gigabits per Second to Megabytes per SecondGbps to MB-s Kilobits per Second to Megabits per SecondKbps to Mbps

Unit Converter FAQ

What unit converters are available?

UnifyUnits includes converters for length, mass and weight, temperature, area, volume, speed, data storage, time, and pressure units.

Do converter pages include formulas?

Yes. Each conversion page shows the formula, worked examples, and a reference table.

Can I use the site without JavaScript?

You can read the formulas, examples, and reference tables without JavaScript. The interactive calculator needs JavaScript.