Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin. Free online temperature converter with instant results.

What is Temperature Converter?

A temperature converter transforms measurements between the three main temperature scales: Celsius (°C), Fahrenheit (°F), and Kelvin (K). Celsius is used worldwide for everyday temperatures, Fahrenheit is primarily used in the United States, and Kelvin is the scientific standard used in physics and chemistry.

Understanding temperature conversions is essential for cooking with international recipes, interpreting weather forecasts while traveling, and working with scientific data. The relationship between these scales isn't a simple multiplication because they have different zero points, making a dedicated converter particularly useful.

Formula

Celsius to Fahrenheit: °F = (°C × 9/5) + 32

Fahrenheit to Celsius: °C = (°F - 32) × 5/9

Celsius to Kelvin: K = °C + 273.15

Fahrenheit to Kelvin: K = (°F - 32) × 5/9 + 273.15

How to Calculate

Select the source temperature scale.
Select the target temperature scale.
Enter the temperature value.
View the converted result.
See equivalent temperatures in all three scales.

Example

Normal body temperature is 37°C, which equals 98.6°F and 310.15K. Water freezes at 0°C (32°F, 273.15K) and boils at 100°C (212°F, 373.15K). Room temperature of 20°C equals 68°F.

Key Benefits

Convert Celsius Fahrenheit Kelvin perfectly
Understand weather in any scale
Scientific conversions for lab work
No formula memorization needed

Common Mistakes to Avoid

Adding 32 before multiplying by 5/9
Confusing Kelvin no degree symbol
Wrong direction giving illogical results

Pro Tips

0C=32F freezing 100C=212F boiling
Double Celsius add 30 for quick F
Kelvin only for scientific work

Key Terms Explained

Celsius: Water freezes 0 boils 100
Fahrenheit: Water freezes 32 boils 212
Kelvin: Starts at absolute zero
Absolute Zero: -273.15C lowest possible

When to Use This Calculator

Traveling to different climate countries
Recipes with unfamiliar temperature units
Science projects needing conversions

Common Use Cases

Converting oven temperatures for international recipes
Understanding weather forecasts while traveling abroad
Working with scientific data that uses Kelvin
Setting thermostat temperatures in unfamiliar units

Frequently Asked Questions

Why is Fahrenheit still used in the US?

The Fahrenheit scale was developed before the metric system became widespread. The US adopted many imperial measurements and never fully transitioned to metric, so Fahrenheit remains in everyday use.

At what temperature are Celsius and Fahrenheit equal?

Celsius and Fahrenheit are equal at -40 degrees. -40°C = -40°F. This is the only point where the two scales show the same number.

What is absolute zero?

Absolute zero is 0 Kelvin (-273.15°C or -459.67°F), the theoretical lowest possible temperature where all molecular motion stops. It has never been achieved but scientists have gotten extremely close.

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