Welcome to UnitConversion.io

Welcome to UnitConversion.io. This website was made to be the best unit conversion website on the internet. The way that I hope to achieve this is to make the pages extremely fast and responsive. As you will see below, there are many unit types and an extensive unit list to choose from, which differentiates UnitConversion.io from other similar sites. Our aim is to be a destination for students, professionals, and everyone in between for converting units quickly and in a well presented format. I hope you enjoy the site, and contact me if you have any feedback!

Blog

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April 4th, 2026
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April 2nd, 2026
As modern development teams build increasingly data-driven applications, choosing the right SQL access tool becomes a strategic decision. While Drizzle ORM has gained popularity for its type safety and lightweight approach, it is far from the only solution available. Teams often evaluate multiple... Read more



Unit Conversion



mm

=

cm

Unit Types

Length

Convert units of length. Examples of such units are meters and inches.

Length Conversion

Area

Convert units of area. Examples of such units are hectare and kilometers squared.

Area Conversion

Mass

Convert units of mass. Examples of such units are ounces and megatonne.

Mass Conversion

Volume

Convert units of volume. Examples of such units are teaspoon and yards cubed.

Volume Conversion

Temperature

Convert units of temperature. Examples of such units are celsius and fahrenheit.

Temperature Conversion

Time

Convert units of time. Examples of such units are seconds and years.

Time Conversion

Speed

Convert units of speed. Examples of such units are miles per hour and knots.

Speed Conversion

Pressure

Convert units of pressure. Examples of such units are kilopascals and pounds per square inch.

Pressure Conversion

Digital

Convert units of digital. Examples of such units are terabits and kilobytes.

Digital Conversion

Parts Per

Convert units of parts per. Examples of such units are parts-per-trillion and parts-per-quadrillion.

Parts Per Conversion

Voltage

Convert units of voltage. Examples of such units are millivolts and kilovolts.

Voltage Conversion

Current

Convert units of current. Examples of such units are amps and milliamps.

Current Conversion

Power

Convert units of power. Examples of such units are kilowatts and megawatts.

Power Conversion

Energy

Convert units of energy. Examples of such units are megawatt hours and gigawatt hours.

Energy Conversion

Volume Flow Rate

Convert units of volume flow rate. Examples of such units are gallons per second and feet cubed per minute.

Volume Flow Rate Conversion

Frequency

Convert units of frequency. Examples of such units are kilohertz and gigahertz.

Frequency Conversion

Pace

Convert units of pace. Examples of such units are seconds per meter and seconds per foot.

Pace Conversion

Illuminance

Convert units of illuminance. Examples of such units are lux and foot-candles.

Illuminance Conversion

Reactive Power

Convert units of reactive power. Examples of such units are mvar and kvar.

Reactive Power Conversion

Angle

Convert units of angle. Examples of such units are radians and arcsecond.

Angle Conversion