Temperature converters change a temperature value from one scale or measurement system to another. Use the tools in this category to convert between Celsius, Fahrenheit and Kelvin, compare common temperatures, calculate oven settings or interpret weather and body temperature readings.
Choose the conversion you need, enter a value and get an accurate result instantly. Each converter also explains the formula used, helping you understand how the calculation works instead of showing only the final number.
Available Temperature Converter Tools
The following temperature converters and reference pages cover the most common everyday, scientific, cooking and weather-related calculations.
| Converter or resource | What it helps you calculate |
|---|---|
| Celsius to Fahrenheit | Convert temperatures from degrees Celsius to degrees Fahrenheit |
| Fahrenheit to Celsius | Convert temperatures from degrees Fahrenheit to degrees Celsius |
| Celsius to Kelvin | Convert Celsius temperatures to the Kelvin scale |
| Kelvin to Celsius | Convert Kelvin values to degrees Celsius |
| Fahrenheit to Kelvin | Convert Fahrenheit temperatures directly to Kelvin |
| Kelvin to Fahrenheit | Convert Kelvin temperatures directly to Fahrenheit |
| Temperature Conversion Chart | Compare common Celsius, Fahrenheit and Kelvin values |
| Oven Temperature Conversion Chart | Compare oven settings in Celsius, Fahrenheit and Gas Mark |
| Temperature Conversion Formula | Find and understand the main temperature conversion formulas |
| Body Temperature Converter | Compare body temperature readings in Celsius and Fahrenheit |
| Weather Temperature Converter | Convert weather forecast temperatures between Celsius and Fahrenheit |
| Gas Mark to Celsius Converter | Convert British Gas Mark oven settings to Celsius temperatures |
Celsius, Fahrenheit and Kelvin Explained
The Celsius scale, written as °C, is widely used for weather forecasts, cooking and everyday temperature measurements. Water freezes at approximately 0°C and boils at approximately 100°C under standard atmospheric pressure.
The Fahrenheit scale, written as °F, places the freezing point of water at 32°F and its boiling point at approximately 212°F under the same conditions.
The Kelvin scale, written as K without a degree symbol, is the SI unit of thermodynamic temperature. It begins at absolute zero, where 0 K equals −273.15°C. A temperature interval of 1 kelvin has the same size as an interval of 1 degree Celsius.
Quick Temperature Conversion Chart
Use this chart to compare several important temperature reference points.
| Reference point | Celsius | Fahrenheit | Kelvin |
|---|---|---|---|
| Absolute zero | −273.15°C | −459.67°F | 0 K |
| Freezing point of water | 0°C | 32°F | 273.15 K |
| Typical room temperature | 20°C | 68°F | 293.15 K |
| Common body temperature reference | 37°C | 98.6°F | 310.15 K |
| Boiling point of water | 100°C | 212°F | 373.15 K |
The freezing and boiling values in the table refer to water under standard atmospheric conditions. Actual boiling temperature can change with atmospheric pressure and altitude. The room and body temperature values are approximate reference points rather than universal fixed values.
Temperature Conversion Formulas
The most common temperature conversions use the following formulas:
| Conversion | Formula |
|---|---|
| Celsius to Fahrenheit | °F = (°C × 9/5) + 32 |
| Fahrenheit to Celsius | °C = (°F − 32) × 5/9 |
| Celsius to Kelvin | K = °C + 273.15 |
| Kelvin to Celsius | °C = K − 273.15 |
| Fahrenheit to Kelvin | K = (°F − 32) × 5/9 + 273.15 |
| Kelvin to Fahrenheit | °F = (K − 273.15) × 9/5 + 32 |
These formulas are exact for conversions between the Celsius, Fahrenheit and Kelvin scales.
How to Use the Temperature Converters
Select the converter that matches your starting unit and the unit you need. Enter the temperature value into the calculator, and the converted result will appear automatically.
For example:
- 20°C equals 68°F.
- 32°F equals 0°C.
- 25°C equals 298.15 K.
- 300 K equals 26.85°C.
For quick everyday calculations, you can use the approximate rule that doubling a Celsius value and adding 30 gives a rough Fahrenheit estimate. However, use the exact converter whenever accuracy matters.
Which Temperature Converter Should You Choose?
Use a direct Celsius, Fahrenheit or Kelvin converter when you already know the two scales involved. Choose the Temperature Conversion Chart when you want to compare several values at once.
For recipes and baking, use the Oven Temperature Conversion Chart or the Gas Mark to Celsius Converter. Weather forecasts are easier to interpret with the Weather Temperature Converter, while the Body Temperature Converter is designed for comparing thermometer readings.
Body temperature results are provided for unit conversion and general information only. They should not be used to diagnose fever, illness or another medical condition.
Frequently Asked Questions
What are the three main temperature scales?
The three most commonly used temperature scales are Celsius, Fahrenheit and Kelvin. Celsius and Fahrenheit are common in everyday use, while Kelvin is the SI unit used for thermodynamic temperature.
Is one degree Celsius equal to one kelvin?
A temperature change of 1°C is equal in size to a change of 1 K. However, their zero points are different: 0°C equals 273.15 K.
Why does Kelvin not use a degree symbol?
The correct unit symbol is K, not °K. Kelvin is an absolute thermodynamic temperature unit rather than a conventional degree scale.
What is the fastest way to convert a temperature?
For an accurate result, select the appropriate temperature converter and enter your value. This avoids calculation errors and provides a result using the correct formula.
