Free Unit Converter
Convert between metric and imperial units in seconds. Pick a category — length, weight, or temperature — enter a value, choose your units, and get an instant, accurate result right in your browser.
Frequently Asked Questions
Which conversions are supported?
The converter covers three categories. Length: millimeter, centimeter, meter, kilometer, inch, foot, yard, and mile. Weight: milligram, gram, kilogram, ounce, pound, and tonne. Temperature: Celsius, Fahrenheit, and Kelvin.
How accurate are the results?
Very. The tool uses standard international conversion factors (for example, 1 inch = 2.54 cm exactly, and 1 pound = 0.45359237 kg). Results are rounded to 10 significant digits so they stay readable without losing precision.
Does it support metric and imperial?
Yes. Both metric units (meters, kilograms, Celsius) and imperial/US units (feet, pounds, Fahrenheit) are included, so you can convert in either direction.
Is my data sent anywhere?
No. Every conversion is calculated locally in your browser with JavaScript. Nothing you enter is uploaded or stored anywhere.