How do I convert Celsius to Fahrenheit?

Multiply the Celsius temperature by 9/5 and add 32. For example, 37°C × 9/5 + 32 = 98.6°F. The converter applies this formula automatically and shows the calculation.

What is absolute zero in each scale?

Absolute zero is 0 K, -273.15°C, or -459.67°F. It is the lowest possible temperature, where all molecular motion stops. The converter flags any temperature below absolute zero as physically impossible.

Why does Kelvin not use a degree symbol?

Kelvin is an absolute temperature scale defined by the SI system, which does not use the degree symbol. You write 273.15 K, not 273.15°K. This convention distinguishes it from the relative scales (Celsius and Fahrenheit).

At what temperature are Celsius and Fahrenheit equal?

Celsius and Fahrenheit are equal at -40 degrees: -40°C = -40°F. This is the only point where the two scales intersect, and it is a useful fact to remember for quick mental estimates.

Can I convert negative temperatures?

Yes. The converter handles negative temperatures correctly in all scales. For example, -40°C converts to -40°F and 233.15 K. The only restriction is that the Kelvin scale cannot go below 0.

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Temperature Converter

To convert Celsius to Fahrenheit, multiply by 9/5 and add 32 (°F = °C × 9/5 + 32). To convert Fahrenheit to Celsius, subtract 32 and multiply by 5/9 (°C = (°F - 32) × 5/9). For Kelvin, add 273.15 to Celsius. Our free converter shows all three scales instantly.

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What is Temperature Converter?

A temperature converter is an online tool that transforms temperature values between the Celsius, Fahrenheit, and Kelvin scales using the standard conversion formulas, displaying all equivalents simultaneously with the formula shown.

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Temperature conversion is one of those things you need often but can never remember the formula for — is it times 9/5 or 5/9, and do you add or subtract 32? This free temperature converter eliminates the guesswork by showing all three scales simultaneously with the exact formula, so you get the right answer and learn the method at the same time.

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