Unit Converter Online Free: Length, Weight, Temperature & More

Convert between any units of length, weight, temperature, speed, area, volume, and data online free — instantly.

The Easiest Way to Convert Units Online

Whether you're converting kilometers to miles, Celsius to Fahrenheit, or kilograms to pounds, our free Unit Converter handles all common conversions instantly — no formula memorization required.

Categories Available

Length: Meters, kilometers, miles, feet, inches, yards, centimeters
Weight: Kilograms, pounds, grams, ounces, stone, tonnes
Temperature: Celsius, Fahrenheit, Kelvin
Speed: km/h, mph, m/s, knots
Area: Square meters, square feet, acres, hectares
Volume: Liters, gallons, cups, fluid ounces
Data: Bytes, KB, MB, GB, TB

Quick Reference: Common Conversions

1 mile = 1.609 km
1 kg = 2.205 lbs
°F = (°C × 9/5) + 32
1 gallon (US) = 3.785 liters
1 inch = 2.54 cm

Frequently Asked Questions

Is Unit Converter free?

Yes, completely free with no signup and no usage limits.

Does it convert in real time?

Yes, results update as you type with no button press needed.

Can I see all conversions at once?

Yes. The tool shows a full conversion table for the selected category below the main converter.

Conclusion

Stop remembering conversion formulas. Use our free Unit Converter to convert between any units instantly — length, weight, temperature, and more.

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