Temperature Interval Converter
A temperature interval is a difference between two temperatures, not a reading on a thermometer. Converting an interval needs only a scaling factor: a change of 1 °C is the same size as a change of 1 K, while a change of 1 °F is 5/9 of that.
1 Kelvin = 1.8 Fahrenheit
How to convert Kelvin to Fahrenheit
One Kelvin equals 1.8 Fahrenheit, so multiply any value in K by 1.8 to get deg F. To convert back, divide by 1.8 — or multiply by 0.5555555556.
deg F = K × 1.8
Example: 25 K × 1.8 = 45 deg F.
Watch out: A rise of 10 °C is a rise of 18 °F — but a reading of 10 °C is 50 °F. Use the Temperature converter for readings.
Kelvin to Fahrenheit table
| Kelvin (K) | Fahrenheit (deg F) |
|---|---|
| 1 | 1.8 |
| 2 | 3.6 |
| 5 | 9 |
| 10 | 18 |
| 15 | 27 |
| 20 | 36 |
| 25 | 45 |
| 50 | 90 |
| 100 | 180 |
Fahrenheit to Kelvin table
| Fahrenheit (deg F) | Kelvin (K) |
|---|---|
| 1 | 0.5555555556 |
| 2 | 1.111111111 |
| 5 | 2.777777778 |
| 10 | 5.555555556 |
| 15 | 8.333333333 |
| 20 | 11.11111111 |
| 25 | 13.88888889 |
| 50 | 27.77777778 |
| 100 | 55.55555556 |
Temperature Interval units at a glance
All 5 units this converter supports, each expressed in Kelvin (K) and the other way round.
| Unit | Symbol | 1 unit in K | 1 K in unit |
|---|---|---|---|
| Kelvin | K | 1 | 1 |
| Celsius | deg C | 1 | 1 |
| Fahrenheit | deg F | 0.5555555556 | 1.8 |
| Rankine | deg R | 0.5555555556 | 1.8 |
| Degree Reaumur | deg Re | 1.25 | 0.8 |
Where temperature interval conversions are used
Engineering tolerances, thermal expansion and heat-transfer calculations, and specifying how much a system heats or cools.
Frequently asked questions
What is 1 Kelvin in Fahrenheit?
1 Kelvin (K) is 1.8 Fahrenheit (deg F).
What is 1 Fahrenheit in Kelvin?
1 Fahrenheit (deg F) is 0.5555555556 Kelvin (K).
How do I convert Kelvin to Fahrenheit?
Multiply the value in Kelvin by 1.8. For example, 5 K × 1.8 = 9 deg F. To go the other way, divide by 1.8.
How many units does the temperature interval converter support?
It converts between 5 units: Kelvin, Celsius, Fahrenheit, Rankine, Degree Reaumur.
What should I watch out for when converting temperature interval?
A rise of 10 °C is a rise of 18 °F — but a reading of 10 °C is 50 °F. Use the Temperature converter for readings.
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Figures on this page are calculated with the same conversion factors as the converter above and shown to up to 10 significant figures. See our disclaimer before relying on a result in a professional or safety-critical context.