Quick answer
Enter a temperature and choose the scales. Quick reference: 0 °C = 32 °F (water freezes), 100 °C = 212 °F (water boils), 37 °C = 98.6 °F (body temperature) and −40 °C = −40 °F.
- °C → °F:
- × 9/5 + 32
- °F → °C:
- (°F − 32) × 5/9
- °C → K:
- + 273.15
- Freezing point:
- 0 °C / 32 °F
- Boiling point:
- 100 °C / 212 °F
- Same value:
- −40 °C = −40 °F
Weather apps, recipes, science homework and thermostat settings all use different scales. Our temperature converter converts Celsius, Fahrenheit, Kelvin and Rankine accurately — including negative values.
How to use Temperature Converter – step by step
- 1 Enter the temperatureNegative numbers and decimals work.
- 2 Choose scalesPick the scale you have and the one you need.
- 3 See the resultThe converted temperature and all other scales appear instantly.
Why use our Temperature Converter?
Four scales
Celsius, Fahrenheit, Kelvin and Rankine.
Exact formulas
No rounding until the final display.
Handles negatives
Perfect for winter weather and freezers.
Fast
Results as you type.
Celsius to Fahrenheit chart
Celsius to Fahrenheit
| Celsius (C) | Fahrenheit (F) |
|---|---|
| -20 C | -4 F |
| -10 C | 14 F |
| 0 C | 32 F |
| 10 C | 50 F |
| 20 C | 68 F |
| 25 C | 77 F |
| 30 C | 86 F |
| 37 C | 98.6 F |
| 40 C | 104 F |
| 100 C | 212 F |
Oven temperatures
| Description | °C | °F | Gas mark |
|---|---|---|---|
| Low | 140 | 275 | 1 |
| Moderate | 180 | 350 | 4 |
| Hot | 200 | 400 | 6 |
| Very hot | 230 | 450 | 8 |
Fan ovens usually need about 20 °C less.
Frequently asked questions
How do I convert Celsius to Fahrenheit?
Multiply by 9, divide by 5, then add 32. For example, 20 °C × 9/5 + 32 = 68 °F.
How do I convert Fahrenheit to Celsius?
Subtract 32, multiply by 5, then divide by 9. For example, (100 °F − 32) × 5/9 ≈ 37.8 °C.
What is Kelvin?
Kelvin is the scientific scale starting at absolute zero. 0 K = −273.15 °C.
At what temperature are Celsius and Fahrenheit equal?
At −40 degrees.
Last updated November 2026 · Written and tested by the SmallEasyTools team.