About

Last updated: 2026-06-25

What we offer

Unit Converter is a free collection of tools built to handle the unit conversions you meet most often, quickly and accurately. It provides nine converters — length, weight, temperature, area, volume, speed, data storage, cooking measurements and shoe sizes — and uses real-time conversion so every unit updates the instant you type a value.

Our principles

• Free, no install — Anyone can use it straight away with no sign-up or app.
• Privacy first — Every conversion runs in your browser (on the client); your input is never sent to or stored on a server.
• Accurate factors — We use international standards plus common Korean customary units, such as 1 inch = 2.54 cm, 1 pound = 453.59237 g and 1 pyeong ≈ 3.305785 m².
• Transparent math — Each converter shows its conversion factors, formulas and worked examples.

A note on reference standards

Some values — cooking densities, shoe size charts and the speed of sound for Mach — depend on conditions (ingredient state, brand, altitude, temperature), so we use standard approximations. Units that differ by country, such as gallons and cups, are labeled with the Korean or US standard used. For precise measurement, trade or experiments, please confirm against official standards and instruments.

The converters

Contact

Send error reports or suggestions to the operator's email and we will review and apply them. For advertising and privacy details, see the Privacy Policy.

Last updated: 2026-06-25