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

Best Real-Time Speech-to-Text Tools for Mac OS

May 31st, 2026
Real-time speech-to-text on Mac OS has moved from a niche accessibility feature to a practical everyday productivity tool. Whether you are dictating emails, capturing meeting notes, generating captions, coding by voice, or transcribing interviews as they happen, todays best tools can turn spoken... Read more


Top AI Tour Guide Tools for Traveling in China with Live Translation (2026)

May 30th, 2026
Traveling in China in 2026 is far easier than it was a decade ago, but language still matters. English signage is common in major airports, premium hotels, and some tourist districts, yet many of the most rewarding experiences happen in small restaurants, train stations, local markets, temples, t... Read more


How Do Collaborative Design Tools Improve Software Architecture Workflows?

May 27th, 2026
Software architecture is no longer shaped by a small group of people working in isolation around static diagrams and long documents. Modern systems are distributed, cloud based, security sensitive, and continuously evolving, which means architecture decisions must be visible, testable, and unders... Read more


Why Are the Best AI Interior Design Tools in 2026 So Advanced?

May 27th, 2026
Interior design software has changed from a helpful visualization aid into a serious decision-making platform. In 2026, the best AI interior design tools are advanced because they combine spatial intelligence, generative design, product data, renovation planning, and user personalization... Read more



Unit Conversion



mm

=

cm

Unit Types

Length

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

Length Conversion

Area

Convert units of area. Examples of such units are millimeters squared and acres.

Area Conversion

Mass

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

Mass Conversion

Volume

Convert units of volume. Examples of such units are milliliters and meters cubed.

Volume Conversion

Temperature

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

Temperature Conversion

Time

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

Time Conversion

Speed

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

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 bytes and gigabytes.

Digital Conversion

Parts Per

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

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 milliamps and kiloamps.

Current Conversion

Power

Convert units of power. Examples of such units are watts and gigawatts.

Power Conversion

Energy

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

Energy Conversion

Volume Flow Rate

Convert units of volume flow rate. Examples of such units are liters per minute and feet cubed per hour.

Volume Flow Rate Conversion

Frequency

Convert units of frequency. Examples of such units are megahertz and revolutions per minute.

Frequency Conversion

Pace

Convert units of pace. Examples of such units are minutes per kilometer 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 gvar.

Reactive Power Conversion

Angle

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

Angle Conversion