Free Unit Converter — Length, Weight, Temperature & More
Quickly convert between common units: length, weight, temperature, volume, area, and speed. This free Unit Converter runs entirely in your browser — no files uploaded or data sent to servers.
Result
—
Precision
Clear
Tip: Choose a category, enter a number, pick units and press Convert. Works offline after page load.
Supported Units (examples)
- Length: meters, kilometers, centimeters, millimeters, miles, yards, feet, inches
- Weight: kilograms, grams, milligrams, pounds, ounces
- Temperature: Celsius, Fahrenheit, Kelvin
- Volume: liters, milliliters, cubic meters, US gallons, US fluid ounces
- Area: square meters, square kilometers, hectares, acres, square feet
- Speed: meters/sec, km/h, mph, knots
How this Unit Converter Works
All calculations run in your browser for privacy and speed. Temperature conversions use exact formulas (Celsius ↔ Fahrenheit ↔ Kelvin).
FAQs
Is my data stored?
No — conversions are performed in your browser and we do not send or store your input.
Is this accurate?
Yes — conversion factors are standard. For scientific use, please verify precision requirements.
Can I add more units?
Yes — additional units can be added in the JavaScript.