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

How to Get an Estimate for a Print Job Online

June 27th, 2026
Getting a print job priced used to mean phone calls, email chains, and waiting for someone at a print shop to manually calculate paper, ink, finishing, and delivery costs. Today, most printing companies offer online estimate tools that can give you a fast, detailed idea of what your project will ... Read more


Single-Minded Proposition: Examples and Marketing Applications

June 26th, 2026
In modern marketing, attention is scarce and choices are abundant. A single-minded proposition helps a brand communicate one clear, persuasive idea that audiences can understand quickly and remember easily. Rather than listing every feature, benefit, and proof point, it focuses t... Read more


SEO Portsmouth: How Local Businesses Can Rank Higher

June 26th, 2026
Portsmouth is packed with brilliant local businesses. Cafes. Plumbers. Dentists. Gyms. Shops. Solicitors. Builders. Beauty salons. You name it, Portsmouth has it. But here is the big question. When someone searches on Google, do they find you, or do they find your competitor down the roa... Read more


Top Franchise Business Intelligence Data Sources in 2026

June 26th, 2026
Franchise growth in 2026 is no longer driven by instinct alone. Operators, investors, franchisors, and franchisees are increasingly using business intelligence data sources to decide where to open, which brands to back, how to benchmark performance, and when to adjust pricing, st... Read more



Unit Conversion



mm

=

cm

Unit Types

Length

Convert units of length. Examples of such units are millimeters and centimeters.

Length Conversion

Area

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

Area Conversion

Mass

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

Mass Conversion

Volume

Convert units of volume. Examples of such units are millimeters cubed and feet cubed.

Volume Conversion

Temperature

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

Temperature Conversion

Time

Convert units of time. Examples of such units are nanoseconds and days.

Time Conversion

Speed

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

Speed Conversion

Pressure

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

Pressure Conversion

Digital

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

Digital Conversion

Parts Per

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

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 kiloamps.

Current Conversion

Power

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

Power Conversion

Energy

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

Energy Conversion

Volume Flow Rate

Convert units of volume flow rate. Examples of such units are gallons per hour and yards cubed per second.

Volume Flow Rate Conversion

Frequency

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

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 volt-ampere reactive and mvar.

Reactive Power Conversion

Angle

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

Angle Conversion