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# Converting Fahrenheit, Celsius, and Kelvin

[youtube id="7wIaiZi60Vg" width="600" height="340" position="left"]Temperature can be written in various ways: Fahrenheit, Celsius, and Kelvin. Sometimes it is necessary to convert between two different temperatures. As long as we can remember which formula goes with which temperatures, we will do great!

**1.) Converting Fahrenheit and Celsius**

Lets start with 90°F. How many degrees Celsius is that? Well our formula is

°C = (°F - 32) × 5/9

By plugging in what we know, our formula becomes °C = (90 - 32) × 5/9. Solving we get °C = 32.2.

If we know the temperature in celsius, we can rearrange the formula and it will work the same way. The formula becomes

(9/5 × °C) + 32 = °F

We plug in what we know and solve.

**2.) Converting Celsius and Kelvin**

We can also convert Kelvin to Celsius by using the following formula:

°C = K - 273.15

If we have 300 degrees kelvin, that is equivalent to 26.85 °C.

Working backwards, we can solve the formula for K giving

°C + 273.15 = K

**3.) Converting Fahrenheit and Kelvin**

While I find it easier to start at Kelvin, convert to Celsius, then change to Fahrenheit, there is a formula that we can use as well.

°F = (K × 9/5) - 459.67

If we know °F, we can rearrange the formula to become

(°F + 459.67) × 5/9 = K