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Free Online Unit Converter
Convert between common units of length, weight, and temperature instantly.
Common Length Conversions
- 1 meter = 3.281 feet
- 1 mile = 1.609 km
- 1 inch = 2.54 cm
Common Weight Conversions
- 1 kg = 2.205 lb
- 1 lb = 16 oz
Temperature Formulas
°F = (°C × 9/5) + 32. °C = (°F − 32) × 5/9
Frequently Asked Questions
Why do units differ by country?
The U.S. mainly uses imperial; most of the world uses metric — a historical standards difference.
Are these conversions exact?
Yes, this uses precise standardized conversion factors.
Can I convert either direction?
Yes, just change which unit is selected on each side.