Temperature Difference Converter (ΔC to ΔF)
Convert a temperature change — a rise, drop or difference — between Celsius, Fahrenheit, Kelvin and Rankine. This is different from converting a temperature reading.
How to use the Temperature Difference Converter (ΔC to ΔF)
- Enter the size of the temperature change.
- Choose the unit it is in.
- Read the same change in the other units.
How it works
A temperature reading converts with °F = °C × 1.8 + 32, but a temperature difference only depends on the size of the degree: ΔF = ΔC × 1.8 and ΔC = ΔF ÷ 1.8. The +32 offset cancels out when you subtract two readings. A 1 K change equals a 1 °C change, and a 1 °R change equals a 1 °F change.
Common mistake: “global warming of 1.5 °C” is a change of 2.7 °F — not 34.7 °F.
Temperature differences
| Δ°C (= ΔK) | Δ°F (= Δ°R) |
|---|---|
| 0.5 | 0.9 |
| 1 | 1.8 |
| 1.5 | 2.7 |
| 2 | 3.6 |
| 3 | 5.4 |
| 5 | 9 |
| 10 | 18 |
| 20 | 36 |
| 50 | 90 |
| 100 | 180 |
Frequently asked questions
How much is a 1 °C rise in Fahrenheit?
1.8 °F.
What is 1.5 °C of warming in Fahrenheit?
2.7 °F.
Why don’t I add 32?
Because 32 is an offset between zero points; it disappears when you take the difference between two temperatures.
Is a change of 1 K the same as 1 °C?
Yes — Kelvin and Celsius degrees are the same size.