Precision unit conversion — free, fast, no sign-up required.
50+
Units supported
6
Categories
0ms
Conversion delay
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Input value
Result
212 °F
formula: °F = (°C × 9/5) + 32
Boiling point
100°C = 212°F
Body temp
37°C = 98.6°F
Freezing
0°C = 32°F
Absolute zero
−273.15°C = 0K
Input value
Result
0.6214 mi
1 meter = 0.000621371 miles
1 mile
1.609 km
1 foot
30.48 cm
1 inch
2.54 cm
Marathon
42.195 km
Input value
Result
68.04 kg
1 pound = 0.453592 kilograms
Body weight
70 kg = 154.3 lb
1 stone
6.35 kg
1 oz
28.35 g
1 metric ton
2,204.6 lb
Input value
Result
62.14 mph
1 km/h = 0.621371 mph
Speed of sound
343 m/s
Speed of light
299,792 km/s
Highway (US)
65 mph = 105 km/h
1 knot
1.852 km/h
Input value
Result
0.2642 gal
1 liter = 0.264172 gallons (US)
1 gallon
3.785 L
1 cup
236.6 mL
1 tablespoon
14.79 mL
1 fl oz
29.57 mL
Input value
Result
10.7639 ft²
1 m² = 10.7639 ft²
1 acre
43,560 ft²
1 hectare
2.471 acres
Football field
≈ 0.91 acres
1 mi²
640 acres
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About
About UnitSwap
UnitSwap is a precision unit conversion tool built for speed and accuracy. Whether you're converting Celsius to Fahrenheit for a recipe, meters to miles for a run, or pounds to kilograms at the gym — UnitSwap handles it in your browser, instantly, with no sign-up required.
All calculations happen locally. Your data never leaves your device.
FAQ
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
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Select the Temperature tab, enter your °C value, choose Fahrenheit as output. Formula: °F = (°C × 9/5) + 32.
How many miles is 1 kilometer?
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1 kilometer = 0.621371 miles. Use the Distance tab with km → miles selected.
Is UnitSwap free?
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Yes. The converter is completely free. UnitSwap Pro ($2.99/mo) removes ads and unlocks history, offline mode, currency conversion, and CSV export.
Does UnitSwap work offline?
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All conversions run in your browser — no internet needed once the page loads. UnitSwap Pro adds full offline caching so the page works even without a connection.
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