Convert Celsius to Fahrenheit
°F = °C × 9/5 + 32. 21 °C = 69.8 °F.
°F = °C × 9/5 + 32
Common values, converted exactly
| degrees Celsius (°C) | degrees Fahrenheit (°F) |
|---|---|
| -40 °C | -40 °F |
| -20 °C | -4 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °F |
| 10 °C | 50 °F |
| 16 °C | 60.8 °F |
| 20 °C | 68 °F |
| 21 °C | 69.8 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 37 °C | 98.6 °F |
| 100 °C | 212 °F |
| 180 °C | 356 °F |
| 200 °C | 392 °F |
| 220 °C | 428 °F |
Related conversions
To convert Celsius to Fahrenheit, apply °F = °C × 9/5 + 32. For example, 21 °C = 69.8 °F.
The two scales are defined exactly against each other: °F = °C × 9/5 + 32. Unlike every other conversion here it is affine, not a simple ratio — there is an offset as well as a factor, which is why you cannot convert a temperature *difference* the same way. The scales cross at −40°, which is the same temperature on both.
Everything on this page is computed in your browser from the exact definitions above — the table is not a stored list of pre-rounded answers, and neither is the converter. For a unit not covered here, the full unit converter handles length, weight, volume, temperature and cooking measures.
How many degrees Fahrenheit is 21 °C?
21 °C = 69.8 °F. °F = °C × 9/5 + 32, so any amount converts the same way — the table on this page lists the values most often looked up.
What is the formula for converting Celsius to Fahrenheit?
°F = °C × 9/5 + 32. The two scales are defined exactly against each other: °F = °C × 9/5 + 32. Unlike every other conversion here it is affine, not a simple ratio — there is an offset as well as a factor, which is why you cannot convert a temperature *difference* the same way. The scales cross at −40°, which is the same temperature on both.
Is the Celsius to Fahrenheit conversion exact?
Yes. The Celsius and Fahrenheit scales are defined against each other exactly, so the conversion introduces no error — only the rounding you choose to apply to the answer.
How do I convert degrees Fahrenheit back to degrees Celsius?
Use the reverse of the same relationship; the fahrenheit to celsius page has its own table and converter.