Convert °C to °F
Fahrenheit and Celsius are linked by the affine formula t/°F = t/°C × 9/5 + 32. So 0 °C = 32 °F (water freezing) and 100 °C = 212 °F (water boiling at sea level). Example: 25 °C × 9/5 + 32 = 77 °F. The only point where both scales agree is −40, and nothing reads below absolute zero: −273.15 °C = −459.67 °F.
Type a value and get the result with its full working shown — the coefficient, the multiplication and the rounding you choose.
degree Celsius → degree Fahrenheit
25 × 9/5 + 32 = 77 °F
See the exact formula: 1 °C × 9/5 + 32 → °F · Source: BIPM SI Brochure, 9th ed.（t/°C = T/K − 273.15）.
Enter accepts · paste works · your locale decimal format is understood
°C to °F conversion table
| °C | °F |
|---|---|
| 1 °C | 33.8000 °F |
| 2 °C | 35.6000 °F |
| 3 °C | 37.4000 °F |
| 4 °C | 39.2000 °F |
| 5 °C | 41.0000 °F |
| 6 °C | 42.8000 °F |
| 7 °C | 44.6000 °F |
| °C | °F |
|---|---|
| 8 °C | 46.4000 °F |
| 9 °C | 48.2000 °F |
| 10 °C | 50.0000 °F |
| 25 °C | 77.0000 °F |
| 50 °C | 122.0000 °F |
| 100 °C | 212.0000 °F |
Rounded to 4 decimals · exact values in the calculator above.
The exact formula
The degree Fahrenheit sets water’s freezing point at 32 °F and boiling point at 212 °F, 180 degrees apart. Absolute zero is −459.67 °F. Multiply by 9/5 + 32 (°C → °F); reverse: multiply by 5/9.
Unit definitions
- degree Celsius (°C)
- The degree Celsius is an SI-derived unit: t/°C = T/K − 273.15. Absolute zero is −273.15 °C. Source: BIPM SI Brochure, 9th ed.（t/°C = T/K − 273.15）.
- degree Fahrenheit (°F)
- The degree Fahrenheit sets water’s freezing point at 32 °F and boiling point at 212 °F, 180 degrees apart. Absolute zero is −459.67 °F. Source: NIST SP 811（t/°F = 9/5·t/°C + 32）.
Frequently asked questions
What is 25 °C in °F?
25 °C = 77 °F. Apply the formula 25 × 9/5 + 32 = 77. For the reverse: (77 − 32) × 5/9 = 25 °C.
What is 100 °C in °F?
100 °C = 212 °F, the boiling point of water at sea level. Calculation: 100 × 9/5 + 32 = 212.
At what temperature are °C and °F equal?
At −40: −40 °C = −40 °F exactly. Check: −40 × 9/5 + 32 = −40. Nothing can read below −273.15 °C (−459.67 °F), absolute zero.
Need more than one unit?
Open the full unit converter — every category, batch mode, CSV export.