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 Is CMOS? Understanding Complementary Metal-Oxide Semiconductor Technology in Modern Electronics

September 3rd, 2026
CMOS is the dominant semiconductor technology used to build low-power digital chips, image sensors, memory circuits, and many control systems inside modern electronics. The name stands for Complementary Metal-Oxide Semiconductor, and the key idea is simple: it pairs two ... Read more


How Sensor Sensing Works: Understanding Data Collection, Detection, and Real-Time Monitoring Systems

September 3rd, 2026
Sensor sensing works by converting a physical condition into an electrical signal, checking that signal against rules, and sending trustworthy data to monitoring software fast enough for action. A temperature probe, motion detector, pressure sensor, or gas sensor does not unders... Read more


API Testing Strategies for Validating Reliability, Security, Performance, and Integration Workflows

September 2nd, 2026
API testing should prove four things before release: the service behaves correctly, fails safely, resists abuse, and still works when connected to real systems. Treat every API as a contract with business impact, not as a thin technical layer. A weak endpoint can slow checkout, e... Read more


American Wire Gauge Explained: How AWG Numbers Affect Cable Diameter, Resistance, and Electrical Capacity

September 2nd, 2026
Smaller AWG numbers mean thicker wire, lower resistance, and higher current capacity. That is the rule to remember before choosing a cable for a circuit, speaker run, battery lead, solar setup, or electronics project. A 10 AWG copper wire is much thicker than a 16 AWG wire, so it... Read more



Unit Conversion



mm

=

cm

Unit Types

Length

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

Length Conversion

Area

Convert units of area. Examples of such units are kilometers squared and square miles.

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 millimeters cubed and yards cubed.

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 seconds and months.

Time Conversion

Speed

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

Speed Conversion

Pressure

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

Pressure Conversion

Digital

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

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 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 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 milliliters per second and kilometers cubed per second.

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 volt-ampere reactive and kvar.

Reactive Power Conversion

Angle

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

Angle Conversion