Unit Converter — Length, Weight, Temperature & More
Convert between common units instantly. Select a category, enter your value, and get your result — no sign-up, no ads during use.
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Quick Reference
📏 Length
1 inch2.54 cm
1 foot30.48 cm
1 yard0.9144 m
1 mile1.609 km
1 km0.621 miles
⚖️ Weight
1 kg2.205 lbs
1 lb453.6 g
1 oz28.35 g
1 stone6.35 kg
1 tonne1,000 kg
🌡️ Temperature
0°C (freezing)32°F
20°C (room)68°F
37°C (body)98.6°F
100°C (boiling)212°F
0 K (absolute zero)−273.15°C
🧪 Volume
1 litre0.264 US gal
1 US gallon3.785 L
1 US cup236.6 mL
1 tablespoon14.79 mL
1 teaspoon4.93 mL
Frequently Asked Questions
Formula: °C = (°F − 32) × 5/9. Quick mental trick: subtract 32, then halve the result and add 10% — this gives an approximation. Example: 68°F → (68−32)=36 → 36/2=18 + 10%(18)=1.8 → ≈19.8°C (actual: 20°C). For exact conversion use the formula or the calculator above.
A US gallon = 3.785 litres. A UK (Imperial) gallon = 4.546 litres — about 20% larger. UK/Australian recipes and fuel economy figures (miles per gallon) use Imperial gallons; US recipes and US vehicles use US gallons. Always specify which gallon when cooking international recipes or comparing fuel efficiency across countries.
A hectare is 10,000 square metres — equivalent to a square with sides of 100 metres. It equals approximately 2.47 acres. One hectare is roughly the size of a standard international football (soccer) pitch. The metric system uses hectares for land area; the Imperial system uses acres. 1 square kilometre = 100 hectares.