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Temperature Converter

Convert between Celsius, Fahrenheit and Kelvin instantly, with the formula and a table of common temperatures.

  • Free
  • Instant results
  • Runs in your browser
In short

°F = °C × 9/5 + 32 and °C = (°F − 32) × 5/9. Water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F); body temperature is about 37 °C (98.6 °F).

About the Temperature Converter

A temperature converter is a device that helps users quickly change the temperature between different devices. It is widely used to ensure meteorology, cooking, engineering science, scientific research and different systems in daily life to ensure accurate temperature reading.


Common Temperature Conversions:


  • Celsius (°C) to Fahrenheit (°F): Used in weather forecasts and daily temperature readings.
  •  Fahrenheit (°F) to Celsius (°C): Common to convert US temperature measurements.
  • Celsius (°C) to Kelvin (K): Used in scientific and engineering programs.
  • Kelvin (K) to Fahrenheit (°F): Essential in physics and thermodynamics.
  • Rankine (°R) to Other Units: Thermodynamic calculations are used.


Key Temperature Conversion Formulas:


1. Celsius to Fahrenheit:

°F=(°C×5/9​)+32


2. Fahrenheit to Celsius:

°C=(°F−32)×9/5​


3. Celsius to Kelvin:

K=°C+273.15


4. Kelvin to Celsius:

°C=K−273.15


5. Fahrenheit to Kelvin:

K=(°F+459.67)×9/5​


6. Kelvin to Fahrenheit:

°F=(K×5/9​)−459.67


7. Rankine to Celsius:

°C=(°R−491.67)×9/5​


Key Uses of the Temperature Converter:


  • Weather Forecasting: Convert temperatures for global comparisons.
  • Cooking & Baking: Adjust recipes based on different unit systems.
  •  Scientific Research: Convert temperatures for laboratory experiments.
  •  HVAC & Engineering: Ensure proper temperature control in systems.
  • Medical Applications: Convert body temperature readings between Celsius and Fahrenheit.

How it works

1. Select the Input Temperature Unit

  • Example: 37°C (Celsius)


2. Select the Output Unit

  • Example: Convert to Fahrenheit (°F)


3. Click ‘Convert’

  • The tool calculates and displays the converted temperature instantly.

Examples

Example 1: Convert 25°C to Fahrenheit

Input:

  • Temperature in Celsius: 25°C
  • Convert To: Fahrenheit (°F)

Calculation:

(25×5/9​)+32=77°F


Result:

  • 25°C = 77°F


Example 2: Convert 300 Kelvin to Celsius

Input:

  • Temperature in Kelvin: 300 K
  • Convert To: Celsius (°C)

Calculation:

300−273.15=26.85°C


Result:

  • 300 K = 26.85°C


Related: Length Converter, Feet to Inches, Inches to Centimeters.

Reference tables

Here is a Reference Table for Temperature Conversion:

Temperature Conversion Reference Table

From Unit

To Unit

Conversion Formula

Example Calculation

Celsius (°C)

Fahrenheit (°F)

(°C × 9/5) + 32

25°C = (25 × 9/5) + 32 = 77°F

Celsius (°C)

Kelvin (K)

°C + 273.15

25°C = 25 + 273.15 = 298.15 K

Fahrenheit (°F)

Celsius (°C)

(°F - 32) × 5/9

77°F = (77 - 32) × 5/9 = 25°C

Fahrenheit (°F)

Kelvin (K)

(°F - 32) × 5/9 + 273.15

77°F = (77 - 32) × 5/9 + 273.15 = 298.15 K

Kelvin (K)

Celsius (°C)

K - 273.15

298.15 K = 298.15 - 273.15 = 25°C

Kelvin (K)

Fahrenheit (°F)

(K - 273.15) × 9/5 + 32

298.15 K = (298.15 - 273.15) × 9/5 + 32 = 77°F

Temperature Conversion Quick Reference

Celsius (°C)

Fahrenheit (°F)

Kelvin (K)

-40°C

-40°F

233.15 K

0°C

32°F

273.15 K

25°C

77°F

298.15 K

37°C

98.6°F

310.15 K

100°C

212°F

373.15 K

Temperature Converter: frequently asked questions

How do I convert Celsius to Fahrenheit?
Multiply by 9/5 (or 1.8) and add 32. 25 °C × 1.8 + 32 = 77 °F.
How do I convert Fahrenheit to Celsius?
Subtract 32 and multiply by 5/9. 350 °F → (350 − 32) × 5/9 ≈ 176.7 °C.
At what temperature are Celsius and Fahrenheit equal?
At −40: −40 °C = −40 °F.
How do I convert to Kelvin?
Add 273.15 to the Celsius value. 0 °C = 273.15 K; absolute zero is 0 K (−273.15 °C).