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 Make Your Own LLM: Open-Source LLM Frameworks vs Hosted AI Platform Alternatives

September 23rd, 2026
Build your own LLM only if ownership, cost control, data privacy, or product fit clearly justify the extra engineering work. For most teams, making an LLM should not mean training a giant model from scratch. It usually means adapting an existing open-source model, adding compan... Read more


How to Inspect Element on iPad: iPad Web Inspector vs Remote Safari DevTools and Browser Alternatives

September 22nd, 2026
The best way to inspect element on an iPad is to use Safaris Web Inspector with a Mac. The iPad does not offer a full built-in right click, inspect tool like desktop Chrome or Safari. If you need real CSS editing, JavaScript debugging, network logs, and console access, Rem... Read more


Python Externally Managed Environment: Python venv vs pipx and Package Management Alternatives

September 22nd, 2026
Use python -m venv for project packages, and use pipx for Python command-line apps. That is the simple rule. If your Linux system says externally managed environment, do not fight it with random sudo pip install commands. That way... Read more


eBay Scraper API: eBay APIs vs E-Commerce Scraping and Product Data Alternatives

September 22nd, 2026
Use official eBay APIs when you need stable, compliant access to permitted marketplace data; use an eBay scraper API only when official endpoints do not expose the fields, coverage, or freshness your product team needs. For serious pricing, catalog, resale, and market research wo... Read more



Unit Conversion



mm

=

cm

Unit Types

Length

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

Length Conversion

Area

Convert units of area. Examples of such units are hectare and square feet.

Area Conversion

Mass

Convert units of mass. Examples of such units are milligrams and tonne.

Mass Conversion

Volume

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

Volume Conversion

Temperature

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

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 meters per second and feet per second.

Speed Conversion

Pressure

Convert units of pressure. Examples of such units are hectopascals and pounds per square inch.

Pressure Conversion

Digital

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

Digital Conversion

Parts Per

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

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 watt hours and kilowatt hours.

Energy Conversion

Volume Flow Rate

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

Volume Flow Rate Conversion

Frequency

Convert units of frequency. Examples of such units are hertz 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 radians and arcsecond.

Angle Conversion