Unit Converters

Browse every conversion category on UnifyUnits. Each category links to dedicated converter pages with formulas, example values, reference tables, manual conversion steps, FAQs, and related converters.

Conversion Categories

Length Converter

Convert length and distance units — meters, feet, inches, miles, km, yards, and more. Free online length converter with instant results and formulas.

11 units available

Mass Converter

Convert mass and weight units — kilograms, pounds, ounces, grams, stones, and tons. Free online weight converter with accurate results and formulas.

10 units available

Temperature Converter

Convert temperature between Celsius, Fahrenheit, Kelvin, and Rankine. Free online temperature converter with instant results, formulas, and examples.

4 units available

Area Converter

Convert area units — sq feet, sq meters, acres, hectares, sq miles, and more. Free online area converter for real estate, land, and construction.

10 units available

Volume Converter

Convert volume units — liters, gallons, cups, milliliters, fluid ounces, and more. Free online volume converter for cooking, chemistry, and liquid use.

18 units available

Speed Converter

Convert speed units — mph, km/h, m/s, knots, Mach, and more. Free online speed converter for transportation, physics, aviation, and sports use.

7 units available

Data Storage Converter

Convert digital storage units — bytes, KB, MB, GB, TB, and bits. Free online data storage converter for file sizes, memory, and bandwidth calculations.

11 units available

Time Converter

Convert time units — seconds, minutes, hours, days, weeks, months, and years. Free online time converter for scheduling, durations, and calculations.

12 units available

Pressure Converter

Convert pressure units — PSI, bar, Pascal, atm, mmHg, and more. Free online pressure converter for engineering, meteorology, diving, and automotive use.

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

Popular Converters

Open a dedicated converter page for formulas, worked examples, tables, and related conversions.

Feet to Centimeters ft to cm Inches to Centimeters in to cm Kilometers to Miles km to mi Meters to Feet m to ft Pounds to Kilograms lb to kg Ounces to Grams oz to g Kilograms to Pounds kg to lb Fahrenheit to Celsius F to C Celsius to Fahrenheit C to F Celsius to Kelvin C to K Gallons to Liters gal to l Cups to Milliliters cup to ml Liters to Gallons l to gal Miles per Hour to Kilometers per Hour mph to kph Kilometers per Hour to Miles per Hour kph to mph Square Feet to Square Meters ft2 to m2 Acres to Hectares acre to ha Megabytes to Gigabytes MB to GB Gigabytes to Terabytes GB to TB Hours to Minutes h to min Days to Hours d to h PSI to Bar psi to bar Atmospheres to Pascals atm to Pa Kilocalorie → Kilojoule kcal to kJ Kilowatt-hour → Megajoule kWh to MJ BTU → Joule BTU to J Joule → Calorie J to cal Degree → Radian deg to rad Radian → Degree rad to deg Degree → Arcminute deg to arcmin Hertz → Kilohertz Hz to kHz Megahertz → Gigahertz MHz to GHz RPM → Hertz rpm to Hz g/cm³ → kg/m³ g-cm3 to kg-m3 lb/ft³ → kg/m³ lb-ft3 to kg-m3 kg/L → kg/m³ kg-l to kg-m3 mpg(US) → L/100km mpg-us to L100km L/100km → mpg(US) L100km to mpg-us mpg → km/L mpg-us to km-l

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?

Dedicated converter pages include the conversion formula, examples, a reference table, manual steps, and related converters.

Are conversions rendered without JavaScript?

Main page content, converter links, descriptions, FAQs, and structured data are included in the server-rendered HTML.