Celsius to Fahrenheit Converter
Convert celsius to fahrenheit instantly — °F = °C × 9/5 + 32
1 °C = 33.8 °F(°F = °C × 9/5 + 32)
Celsius to Fahrenheit conversion table
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| -40 | -40 |
| -20 | -4 |
| -10 | 14 |
| 0 | 32 |
| 5 | 41 |
| 10 | 50 |
| 15 | 59 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 35 | 95 |
| 37 | 98.6 |
| 40 | 104 |
| 100 | 212 |
How it works
Enter a value in celsius and it is converted to fahrenheit using the exact factor: °F = °C × 9/5 + 32. The conversion also works in reverse — edit either field.
Celsius to Fahrenheit formula
°F = °C × 9/5 + 32
- °C
- celsius
- °F
- fahrenheit
Worked example
- Convert 25 °C to Fahrenheit
- °F = °C × 9/5 + 32
25 × 9/5 + 32 = 77 °F
Good to know
- The conversion factor is exact by definition (international yard and pound agreement, 1959) — rounding only comes from the decimals you keep.
- For the reverse conversion, see the Celsius to Fahrenheit converter below.
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Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 (1.8) and add 32. So 20 °C = 20 × 1.8 + 32 = 68 °F. To go back, subtract 32 and divide by 1.8.
What temperature is the same in Celsius and Fahrenheit?
−40°. It is the one point where the two scales cross: −40 °C = −40 °F.
What is normal body temperature in both scales?
About 37 °C = 98.6 °F, though healthy body temperature varies roughly between 36.1 and 37.2 °C (97-99 °F).
What is a quick mental estimate for °C to °F?
Double the Celsius value and add 30: 25 °C → 80 °F (true value 77 °F). Good enough for weather; use the exact formula when precision matters.