Temperature Converter: Celsius, Fahrenheit & Kelvin Explained

Temperature conversion is one of the most common unit conversions, especially when traveling internationally or working with scientific data. Understanding the three main temperature scales helps you convert quickly and accurately.

The Three Temperature Scales

Scale	Freezing Point of Water	Boiling Point of Water	Absolute Zero
Celsius (C)	0	100	-273.15
Fahrenheit (F)	32	212	-459.67
Kelvin (K)	273.15	373.15	0

Conversion Formulas

Celsius to Fahrenheit

F = (C × 9/5) + 32

Fahrenheit to Celsius

C = (F - 32) × 5/9

Celsius to Kelvin

K = C + 273.15

Quick Reference Table

Celsius	Fahrenheit	Description
-40	-40	Where both scales meet
0	32	Water freezes
20	68	Room temperature
37	98.6	Body temperature
100	212	Water boils

Fun Facts

Celsius and Fahrenheit are equal at exactly -40 degrees

The Kelvin scale has no negative values — 0 K is absolute zero

Most countries use Celsius; the United States primarily uses Fahrenheit

Scientists typically use Kelvin for calculations

Practical Applications

Cooking: Converting oven temperatures between recipe systems

Travel: Understanding weather forecasts in different countries

Science: Converting between laboratory and everyday scales

HVAC: Setting heating and cooling systems

Try It Yourself

Convert between Celsius, Fahrenheit, and Kelvin instantly with our free Temperature Converter.