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

What Are Parsers? Data Parsers vs ETL, Scraping, and API-Based Alternatives

September 19th, 2026
A parser is a tool that turns messy data into neat fields your software can use. It reads text, files, web pages, emails, logs, or code. Then it pulls out the useful bits. Think of it as a tiny office goblin that finds names, dates, totals, prices, IDs, and addresses without sigh... Read more


Is Janitor AI Safe? AI Chatbot Privacy vs AI Assistant Alternatives

September 19th, 2026
Janitor AI can be safe for casual roleplay, but it should not be treated as a private AI assistant. Its main risk is not that every chat is automatically exposed; the bigger issue is that users may share intimate prompts, API keys, names, fantasies, work details, or personal prob... Read more


Coding Companion: Cursor vs GitHub Copilot and Other AI Assistants for Everyday Programming

September 18th, 2026
Choose Cursor if you want an AI-first coding environment, and choose GitHub Copilot if you want strong assistance inside the editor you already use. For most everyday programming, that single split is the most useful way to think about the choice. Cursor changes how you work with... Read more


Claude Code PyCharm: Claude Code vs GitHub Copilot and Other AI Coding Tools for JetBrains IDEs

September 17th, 2026
Claude Code is best for PyCharm users who want an agent that can inspect a project, edit several files, run tests, and explain its reasoning, while GitHub Copilot remains stronger for fast inline autocomplete inside JetBrains IDEs. JetBrains AI Assistant, Tabnine, Codeium, Contin... Read more



Unit Conversion



mm

=

cm

Unit Types

Length

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

Length Conversion

Area

Convert units of area. Examples of such units are inches squared and square feet.

Area Conversion

Mass

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

Mass Conversion

Volume

Convert units of volume. Examples of such units are teaspoon and tablespoon.

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 seconds and minutes.

Time Conversion

Speed

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

Speed Conversion

Pressure

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

Pressure Conversion

Digital

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

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 volts 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 megawatts and gigawatts.

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 kilometers cubed per second and gallons 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 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 gvar.

Reactive Power Conversion

Angle

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

Angle Conversion