Convert Kelvin to Fahrenheit
Unit definitions
Kelvin
Kelvin is the standard unit of thermodynamic temperature in the International System of Units (SI). Kelvin generally has no negative values as it starts at absolute zero, which is the lowest temperature theoretically possible.
Fahrenheit
Fahrenheit is a scale commonly used in the United States. Temperature in $^{\circ}\text{F}$ is equal to $\text{K} \times \frac{9}{5} - 459.67$.
How to convert Kelvin to Fahrenheit
$$\text{Temperature}_{\text{°F}} = \left( - 273.15 + \text{Temperature}_{\text{K}}\right) \cdot \frac{9}{5} + 32$$
Examples
Example 1
Convert $40.0\ \text{K}$ to $\text{°F}$.
$$\text{Temperature}_{\text{°F}} = \left( - 273.15 + 40.0\right) \cdot \frac{9}{5} + 32$$
$$\text{Temperature}_{\text{°F}} = -387.67$$
$$\therefore \ 40.0\ \text{K} = -387.67 \ \text{°F}$$
Example 2
Convert $90.0\ \text{K}$ to $\text{°F}$.
$$\text{Temperature}_{\text{°F}} = \left( - 273.15 + 90.0\right) \cdot \frac{9}{5} + 32$$
$$\text{Temperature}_{\text{°F}} = -297.67$$
$$\therefore \ 90.0\ \text{K} = -297.67 \ \text{°F}$$
Example 3
Convert $105.0\ \text{K}$ to $\text{°F}$.
$$\text{Temperature}_{\text{°F}} = \left( - 273.15 + 105.0\right) \cdot \frac{9}{5} + 32$$
$$\text{Temperature}_{\text{°F}} = -270.67$$
$$\therefore \ 105.0\ \text{K} = -270.67 \ \text{°F}$$
Example 4
Convert $135.0\ \text{K}$ to $\text{°F}$.
$$\text{Temperature}_{\text{°F}} = \left( - 273.15 + 135.0\right) \cdot \frac{9}{5} + 32$$
$$\text{Temperature}_{\text{°F}} = -216.67$$
$$\therefore \ 135.0\ \text{K} = -216.67 \ \text{°F}$$
Example 5
Convert $170.0\ \text{K}$ to $\text{°F}$.
$$\text{Temperature}_{\text{°F}} = \left( - 273.15 + 170.0\right) \cdot \frac{9}{5} + 32$$
$$\text{Temperature}_{\text{°F}} = -153.67$$
$$\therefore \ 170.0\ \text{K} = -153.67 \ \text{°F}$$
Kelvin to Fahrenheit conversion table
Convert Kelvin to other Temperature units
| Kelvin [K] | Other unit |
|---|---|
| 1 | -272.15 Celsius [°C] |
| 1 | 1.8 Rankine [°R] |