Temperature Converter

How to Use the Temperature Converter

Enter a temperature value, select the unit you are converting from, and the unit you want to convert to. Click "Convert" to see the result along with the formula used. The reference table below shows common temperatures across all three scales for quick comparison.

Temperature Conversion Formulas

Fahrenheit to Celsius

°C = (°F - 32) × 5/9

Subtract 32 from the Fahrenheit temperature, then multiply by 5/9 (or approximately 0.5556). For example, 72°F = (72 - 32) × 5/9 = 22.22°C.

Celsius to Fahrenheit

°F = (°C × 9/5) + 32

Multiply the Celsius temperature by 9/5 (or 1.8), then add 32. For example, 25°C = (25 × 9/5) + 32 = 77°F.

Celsius to Kelvin

K = °C + 273.15

Simply add 273.15 to the Celsius temperature. Kelvin and Celsius have the same degree size, they just have different zero points.

Fahrenheit to Kelvin

K = (°F - 32) × 5/9 + 273.15

First convert to Celsius, then add 273.15 to get Kelvin.

Understanding Temperature Scales

The three major temperature scales each have different origins and uses:

• Fahrenheit (°F): Developed by Daniel Gabriel Fahrenheit in 1724. Water freezes at 32°F and boils at 212°F. Primarily used in the United States for weather, cooking, and everyday temperatures.
• Celsius (°C): Developed by Anders Celsius in 1742. Water freezes at 0°C and boils at 100°C. Used worldwide for everyday temperatures and in most scientific contexts.
• Kelvin (K): The SI unit of temperature, starting at absolute zero. Used in physics, chemistry, and engineering. One kelvin equals one degree Celsius in size.

Quick Mental Conversion Tips

• To roughly convert °F to °C: subtract 30 and divide by 2. (Not exact, but close for everyday temperatures.)
• To roughly convert °C to °F: double it and add 30.
• Remember that -40° is the same in both Fahrenheit and Celsius.
• Room temperature is about 20°C or 68°F.
• Body temperature is about 37°C or 98.6°F.

Temperature in Cooking

Understanding temperature conversions is essential when following recipes from different countries. European recipes use Celsius, while American recipes use Fahrenheit. Common oven temperatures include 180°C (350°F) for baking, 200°C (400°F) for roasting, and 220°C (425°F) for high-heat cooking.