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  1. Home
  2. Unit Converters
  3. Temperature Converter

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin instantly. Perfect for weather, cooking, science experiments, and international travel. Shows the conversion formulas for reference and learning.

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

  1. Select the source temperature scale.
  2. Select the target temperature scale.
  3. Enter the temperature value.
  4. View the converted result.
  5. 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

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

About

A temperature converter instantly converts between Celsius, Fahrenheit, and Kelvin — the three most widely used temperature scales. Whether you're cooking, traveling, studying science, or checking weather, it eliminates the need to memorize conversion formulas.

How to Use

Use a temperature converter when following recipes from different countries, understanding weather forecasts abroad, working on scientific experiments, or setting thermostats and ovens in unfamiliar units.

  1. Select the temperature scale you're converting from (Celsius, Fahrenheit, or Kelvin).
  2. Select the target scale you want to convert to.
  3. Enter the temperature value you want to convert.
  4. Get the accurate converted temperature instantly, along with the conversion formula.

Common Use Cases

  • Converting oven temperatures between Celsius and Fahrenheit for international recipes
  • Understanding weather forecasts and climate data when traveling to different countries
  • Working with scientific data and laboratory measurements that use the Kelvin scale
  • Setting thermostats, ovens, and HVAC systems when living or working abroad

Pro Tips

  • Remember 0°C = 32°F (freezing) and 100°C = 212°F (boiling) as anchor points
  • For a quick Fahrenheit estimate, double the Celsius and add 30
  • Use Kelvin only for scientific contexts — it starts at absolute zero, not water freezing

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.
Why does the US still use Fahrenheit when most countries use Celsius?
The Fahrenheit scale was developed in the early 18th century by Daniel Gabriel Fahrenheit, before the metric system became widespread. The US adopted many imperial measurements and never fully transitioned to metric, so Fahrenheit remains in everyday use for weather, cooking, and body temperature.
At what temperature do Celsius and Fahrenheit meet?
Celsius and Fahrenheit are equal at -40 degrees. -40°C = -40°F. This is the only point where both scales show the same numeric value.
What is absolute zero and why is it important?
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 come within billionths of a degree. It is the foundation of the Kelvin scale and essential in thermodynamics.

Popular Conversions

°C°FCelsius → Fahrenheit°F°CFahrenheit → Celsius°CKCelsius → KelvinK°CKelvin → Celsius°FKFahrenheit → KelvinK°FKelvin → Fahrenheit

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Result
32° Fahrenheit