How do I convert Celsius to Fahrenheit?

Multiply by 9/5 and add 32: F = C × 9/5 + 32. For example, 20°C = 68°F. The temperature converter does this instantly, both directions.

How do I convert Fahrenheit to Celsius?

Subtract 32 and multiply by 5/9: C = (F − 32) × 5/9. For example, 98.6°F ≈ 37°C, which is normal body temperature.

What is Kelvin used for?

Kelvin is the scientific temperature scale with an absolute zero of 0 K. It is used in physics, chemistry, and astronomy. K = °C + 273.15.

At what temperature are Celsius and Fahrenheit equal?

At −40°, the two scales read the same number: −40°C = −40°F. This is a handy check for verifying a converter is working.

Why can I not multiply Celsius by a simple factor?

Temperature scales have different zero points, so conversion needs both a scale factor and an offset. Unlike length or weight, temperature cannot be converted by multiplication alone.

Temperature Converter

Convert temperatures precisely between Celsius, Fahrenheit, and Kelvin. Because temperature scales have different zero points, the converter applies both scale and offset formulas for exact results.

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