Charts & references · 3 min read
Celsius to Fahrenheit Chart (−40 to 100 °C) With Kelvin
The chart
| °C | °F | K |
|---|---|---|
| -40 | −40 | 233.15 |
| -30 | −22 | 243.15 |
| -20 | −4 | 253.15 |
| -10 | 14 | 263.15 |
| 0 | 32 | 273.15 |
| 5 | 41 | 278.15 |
| 10 | 50 | 283.15 |
| 15 | 59 | 288.15 |
| 20 | 68 | 293.15 |
| 25 | 77 | 298.15 |
| 30 | 86 | 303.15 |
| 37 | 98.6 | 310.15 |
| 40 | 104 | 313.15 |
| 50 | 122 | 323.15 |
| 60 | 140 | 333.15 |
| 70 | 158 | 343.15 |
| 80 | 176 | 353.15 |
| 90 | 194 | 363.15 |
| 100 | 212 | 373.15 |
The formulas
- °F = °C × 9/5 + 32
- °C = (°F − 32) × 5/9
- K = °C + 273.15
A 72 °F room in Celsius
Step-by-step working 2 steps
- 1Convert to Celsius first
(72 − 32) × 5/9 = 22.222222 °C
- 2Convert Celsius to °C
22.222222 °C
The point where they agree
Set °F = °C = x: x = 9x/5 + 32, so −4x/5 = 32 and x = −40.
A quick estimate
For a rough Celsius → Fahrenheit, double and add 30: 20 °C → 70 °F (exact: 68). It drifts at extremes, so use the formula for anything important. Full method: Celsius to Fahrenheit.
Frequently asked questions
What is normal body temperature in Fahrenheit?
About 98.6 °F, which is 37 °C (98.6 °F).
Is Kelvin the same size as Celsius?
Yes — one kelvin equals one degree Celsius; only the zero point differs.
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