6 categories · 50+ units · instant

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Precision unit conversion — free, fast, no sign-up required.

50+
Units supported
6
Categories
0ms
Conversion delay
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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Input value
Result
—
Rates from the European Central Bank via frankfurter.app
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Cooking & Nutrition units is a Pro feature

Ingredient-specific cup ⇄ gram conversions, plus calorie and nutrition unit conversions.

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Ingredient
Input value
Result
—
Density-based — actual weight varies with how ingredients are packed/measured
Nutrition units
—
1 kcal = 4.184 kJ
About

About UnitPortal

UnitPortal 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 — UnitPortal handles it in your browser, instantly, with no sign-up required. All calculations happen locally; your data never leaves your device.

Read more about how UnitPortal works →

FAQ

Frequently Asked Questions


How do I convert Celsius to Fahrenheit? +
Select the Temperature tab, enter your °C value, choose Fahrenheit as output. Formula: °F = (°C × 9/5) + 32.
How many miles is 1 kilometer? +
1 kilometer = 0.621371 miles. Use the Distance tab with km → miles selected.

See the full FAQ →

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History PRO

Conversion History

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