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

Alternative to Smartsheet: Comparing Modern Work Management and Collaboration Platforms

June 23rd, 2026
Choosing an alternative to Smartsheet is not simply a matter of finding another project tracker. For many organizations, Smartsheet has become part spreadsheet, part project management system, part reporting layer, and part collaboration hub. Replacing it requires a careful look at how teams plan... Read more


Mobile App Development Teams: Roles, Processes, and Best Practices for Successful Delivery

June 22nd, 2026
Building a successful mobile application is not only a matter of writing code. It requires a coordinated team, a disciplined delivery process, and clear standards for quality, security, scalability, and user experience. Whether an organization is launching a consumer product, an internal enterpri... Read more


Dropbox Disadvantages: Security, Cost, and Scalability Considerations

June 20th, 2026
Dropbox is like a friendly digital backpack. You put files in it. They follow you around. Nice, right? But every backpack has limits. Some zippers jam. Some straps cost extra. Some pockets are not safe enough for secret treasure. TLDR: Dropbox is easy to use, but ... Read more


Kaspr vs Other Email Finder Tools: Which One Is Better?

June 20th, 2026
Choosing an email finder tool has become a practical decision for sales teams, recruiters, founders, and marketers who need reliable B2B contact data without wasting hours on manual research. Among the many options available, Kaspr is often compared with tools such as Hunter, Apo... Read more



Unit Conversion



mm

=

cm

Unit Types

Length

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

Length Conversion

Area

Convert units of area. Examples of such units are acres and square miles.

Area Conversion

Mass

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

Mass Conversion

Volume

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

Volume Conversion

Temperature

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

Temperature Conversion

Time

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

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 pounds per square inch and kilopound per square inch.

Pressure Conversion

Digital

Convert units of digital. Examples of such units are bits and gigabits.

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 kiloamps.

Current Conversion

Power

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

Power Conversion

Energy

Convert units of energy. Examples of such units are watt hours and joules.

Energy Conversion

Volume Flow Rate

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

Volume Flow Rate Conversion

Frequency

Convert units of frequency. Examples of such units are hertz and radian per second.

Frequency Conversion

Pace

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

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 volt-ampere reactive and kvar.

Reactive Power Conversion

Angle

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

Angle Conversion