Temperature conversion
21 °C to °F
69.8 °F
21 degrees Celsius = 69.8 degrees Fahrenheit. Exact factor: °F = °C × 9/5 + 32.
Live converter
Edit either field — the other updates instantly. Type decimal values like 38.4.
The formula
°F = °C × 9/5 + 32
Worked example: 21 × 9/5 + 32 = 69.8 °F.
Values near 21 °C
| °C | °F |
|---|---|
| 18 | 64.4 |
| 19 | 66.2 |
| 20 | 68 |
| 21this page | 69.8 |
| 22 | 71.6 |
| 23 | 73.4 |
| 24 | 75.2 |
Frequently asked
How do you convert degrees Celsius to degrees Fahrenheit?
Apply the formula °F = °C × 9/5 + 32. Enter any value in the live converter above and the result updates as you type.
What is 21 °C in °F?
21 °C equals 69.8 °F. The reference table below shows the values immediately around 21 °C.
Why does temperature conversion add 32?
The two scales have different zero points and step sizes. Water freezes at 32 °F but 0 °C, so the formula rescales by 5/9 and shifts by the 32-degree offset.