Temperature Converter

What This Converter Does

The three temperature scales just place their zero and their step size differently. Celsius puts 0 at water’s freezing point and 100 at boiling. Fahrenheit uses a different zero and smaller degrees, so that same freezing point reads 32. Kelvin starts at absolute zero - the coldest anything can possibly get - but uses the same size step as Celsius.

Because the scales are both shifted and stretched, converting takes a little multiplying and adding, not just one factor. Enter a temperature in any scale and see all three at once.

The Formulas

$$\begin{aligned} {}^{\circ}\mathrm{F} &= {}^{\circ}\mathrm{C} \times \tfrac{9}{5} + 32 \\ {}^{\circ}\mathrm{C} &= ({}^{\circ}\mathrm{F} - 32) \times \tfrac{5}{9} \\ \mathrm{K} &= {}^{\circ}\mathrm{C} + 273.15 \end{aligned}$$

How to Use It

1. Enter the temperature.
2. Choose the scale it is in.
3. Read it in Celsius, Fahrenheit, and Kelvin.

Worked Examples

Input	Celsius	Fahrenheit	Kelvin
100°C	100	212	373.15
0°C	0	32	273.15
98.6°F	37	98.6	310.15
300 K	26.85	80.33	300

FAQ

How do you convert Celsius to Fahrenheit?

Multiply by 9/5 and add 32: ${}^\circ\text{C} \times \frac{9}{5} + 32$. For 100°C: $212\,{}^\circ\text{F}$.

How do you convert Fahrenheit to Celsius?

Subtract 32 and multiply by 5/9: $({}^\circ\text{F} - 32) \times \frac{5}{9}$. For 98.6°F: $37\,{}^\circ\text{C}$.

What is Kelvin?

Kelvin starts at absolute zero. To convert from Celsius, add 273.15; water freezes at 273.15 K and boils at 373.15 K.