# Kelvin to Fahrenheit Converter

URL: https://speedycalculator.com/calculators/conversion/kelvin-to-fahrenheit/
Last updated: 2026-10-25

> Convert kelvins to degrees Fahrenheit instantly. Multiply kelvin by 9/5 and subtract 459.67 to get Fahrenheit.

## Inputs

- Kelvins (K)

## Results

- Degrees Fahrenheit

## Formula

```
°F = K × 9/5 − 459.67
```

## Explanation

Multiply kelvin by 9/5 and subtract 459.67 to get Fahrenheit. Engineers in the U.S. working with SI data use this often.

### How to use the Kelvin to Fahrenheit Converter

- Type the number of kelvins into the **Kelvins** field. Decimals such as 150 are fine.
- Read the answer in **Degrees Fahrenheit** – it updates as you type, with no button to press.
- To convert the other way, type into **Degrees Fahrenheit** and the kelvins are recalculated.
- Press **Copy results** to copy both values with the page title, or **Copy link** to share this exact conversion.

This page converts only K ⇄ °F. Need a different unit? Use the general temperature converter, where you can choose any “from” and “to” unit.

### How it works

Kelvins and degrees Fahrenheit use different zero points as well as different sized degrees, so this is not a simple multiplication: the calculator applies the formula °F = K × 9/5 − 459.67, which first scales the value and then shifts it by the offset between the two zero points. Going back uses the inverse, K = (°F − -459.67) ÷ 1.8. Results are calculated at full precision and rounded only for display, so typing into either field gives consistent values.

### How to convert kelvins to degrees Fahrenheit

- Start with the value in kelvins: **300 K**.
- Apply the formula °F = K × 9/5 − 459.67.
- The result is **80.33 °F**.
- To go back, use K = (°F − -459.67) ÷ 1.8.

### K to °F conversion table

KelvinsDegrees FahrenheitDegrees FahrenheitKelvins0 K-459.67 °F-459.67 °F-5.684342 × 10-14 K77 K-321.07 °F0 °F255.37222 K255.37 K-0.004 °F32 °F273.15 K273.15 K32 °F70 °F294.26111 K293.15 K68 °F212 °F373.15 K300 K80.33 °F310.15 K98.6 °F373.15 K212 °F500 K440.33 °F1,000 K1,340.33 °F

### What is a kelvin?

The kelvin is the SI unit of temperature. It starts at absolute zero, the coldest possible temperature, and has the same step size as the degree Celsius.

### What is a degree Fahrenheit?

The Fahrenheit scale, proposed by Daniel Fahrenheit in 1724, puts water’s freezing point at 32 °F and boiling point at 212 °F. It is the everyday scale in the United States.

### Common mistakes to avoid

Forgetting the offset (°f is not just °c × 1.8), converting temperature differences with the full formula (a change of 10 °c is a change of 18 °f, with no +32), and writing “degrees kelvin”.

## Worked example

Inputs — Kelvins: 300 K.

Results — **Degrees Fahrenheit = 80.33 °F**.

## FAQ

**What is 300 K in Fahrenheit?**
80.33 °F.

**What is absolute zero in Fahrenheit?**
−459.67 °F.

**How do I convert kelvins to degrees Fahrenheit?**
Use °F = K × 9/5 − 459.67. For example, 300 K = 80.33 °F.

**How do I convert degrees Fahrenheit back to kelvins?**
Use K = (°F − -459.67) ÷ 1.8, or type the value into the degrees Fahrenheit field above.

**What is 1,000 K in degrees Fahrenheit?**
1,000 K = 1,340.33 °F.

**Is this conversion exact?**
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.

**Can I convert to other units on this page?**
This page converts only between kelvins and degrees Fahrenheit. To pick any temperature unit, use the general temperature converter linked under Related calculators.

**What formula does the Kelvin to Fahrenheit Converter use?**
°F = K × 9/5 − 459.67.


## Sources

- [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)