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

Blackbaud Raiser's Edge Review: Features, Pricing & Nonprofit CRM Alternatives

August 14th, 2026
If your nonprofit has donors, events, gifts, emails, grants, and a spreadsheet named final final donors version 9, you may be ready for a real CRM. Blackbaud Raisers Edge NXT is one of the biggest names in nonprofit fundraising software. It is powerful. It is also not the simplest tool in... Read more


SmartFlow Review: Workflow Automation Software Features & Alternatives

August 14th, 2026
Workflow automation has moved from nice to have to operational necessity. Teams now expect software to route tasks, trigger approvals, sync data, and notify the right people without someone manually chasing every step. SmartFlow fits into this category as a workflow automation ... Read more


Cbox Review: Features, Embedded Chat Widgets & Alternatives

August 14th, 2026
For website owners, community managers, streamers, and small publishers, a simple embedded chat box can turn a static page into a more active gathering place. Cbox is one of the long-running tools in this category, offering a lightweight chat widget that can be placed on websites... Read more


PaySchools Review: Features, School Payment Solutions & Alternatives

August 14th, 2026
For districts that need to collect lunch money, activity fees, field trip payments, and other school-related charges, PaySchools is a widely used school payment platform designed to reduce cash handling and simplify family transactions. This review looks at how PaySchools works, ... 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 millimeters squared and kilometers squared.

Area Conversion

Mass

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

Mass Conversion

Volume

Convert units of volume. Examples of such units are liters and cups.

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 milliseconds and years.

Time Conversion

Speed

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

Speed Conversion

Pressure

Convert units of pressure. Examples of such units are pascal and torrs.

Pressure Conversion

Digital

Convert units of digital. Examples of such units are megabits and terabytes.

Digital Conversion

Parts Per

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

Parts Per Conversion

Voltage

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

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 watts and kilowatts.

Power Conversion

Energy

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

Energy Conversion

Volume Flow Rate

Convert units of volume flow rate. Examples of such units are inches cubed per minute and gallons per hour.

Volume Flow Rate Conversion

Frequency

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

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 gvar.

Reactive Power Conversion

Angle

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

Angle Conversion