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Celsius to Fahrenheit (°C to °F)

Convert °C to °F with the exact formula (× 9/5 + 32), plus a table of weather, body and oven temperatures.

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The formula is °F = °C × 9/5 + 32: multiply by 1.8, then add 32. It needs the offset because water freezes at 0 °C but 32 °F. So 25 °C is 77 °F, 37 °C (body temperature) is 98.6 °F and a 45 °C summer afternoon in the Gulf is 113 °F.

Ovens are where people most often get stuck: 180 °C is 356 °F (recipes round to 350 °F), 200 °C is 392 °F (400 °F) and 220 °C is 428 °F (425 °F). The table includes these. For a change in temperature rather than a reading, multiply by 1.8 without adding 32.

How to use it

  1. Type the value in the first box; the converted value appears in the second box as you type.
  2. Or type in the second box to convert the other way.
  3. Use the Decimals menu to round, and the quick-reference table for common values.

Frequently asked questions

What is the formula for Celsius to Fahrenheit?

°F = °C × 9/5 + 32. Example: 30 °C × 1.8 = 54, plus 32 = 86 °F.

What is a quick mental estimate?

Double it and add 30: 20 °C → 70 °F (exact 68). The error grows at high temperatures, so use the exact formula for cooking.

What is 180 °C in Fahrenheit?

356 °F. Recipes usually round it to 350 °F, which is 176.7 °C.

Is 38 °C a fever?

It is 100.4 °F, the threshold many health services use to define a fever. This page only converts the number; ask a clinician about symptoms.

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