How do I convert Celsius to Fahrenheit?

To convert Celsius to Fahrenheit, you use this quick formula:

Multiply the Celsius temperature by 1.8 (or 9/5), then add 32.

The Formula:

$$(^\circ\text{C} \times 1.8) + 32 = ^\circ\text{F}$$

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An Example:

Let's convert 20°C to Fahrenheit:

1. Multiply by 1.8: $20 \times 1.8 = 36$
2. Add 32: $36 + 32 = 68$

So, 20°C is 68°F.

A Quick Trick for Estimation:

If you don't have a calculator and just need a rough idea, double the Celsius number and add 30.

• $20 \times 2 = 40$
• $40 + 30 = 70$
• It’s not exact, but it gets you close enough to know if you need a jacket!