About this calculator
**Definition:** Temperature converters are used to convert between the three temperature units Celsius (°C), Fahrenheit (°F), and Kelvin (K).
**Conversion formula:**
1. **Celsius ↔ Fahrenheit:** • °F = (°C × 9/5) + 32 • °C = (°F - 32) × 5/9
2. **Celsius ↔ Kelvin:** • K = °C + 273.15 • °C = K - 273.15
3. **Fahrenheit ↔ Kelvin:** • K = (°F - 32) × 5/9 + 273.15 • °F = (K - 273.15) × 9/5 + 32
**Conversion example:** • 25°C = 77°F = 298.15K (room temperature) • 0°C = 32°F = 273.15K (freezing point of water) • 100°C = 212°F = 373.15K (boiling point of water) • 37°C = 98.6°F = 310.15K (human body temperature)
**Quick Answer:** Celsius is the global standard, Fahrenheit is mostly used in the United States, and Kelvin is used in scientific calculations.
**Common reference points:** • Absolute zero: -273.15°C = -459.67°F = 0K • Freezing point of water: 0°C = 32°F = 273.15K • Room temperature: 20-25°C = 68-77°F = 293-298K • Human body temperature: 37°C = 98.6°F = 310K • Boiling point of water: 100°C = 212°F = 373K
**Last updated:** April 2024
What it calculates
The temperature converter changes values between Celsius, Fahrenheit, and Kelvin for weather, cooking, science, and engineering.
Formula
- F = C * 9/5 + 32.
- C = (F - 32) * 5/9.
- K = C + 273.15.
Inputs
- Temperature value.
- Source temperature unit.
- Target temperature unit.
Example
| Input | Conversion | Result |
|---|---|---|
| 0°C | to °F | 32°F |
| 100°C | to °F | 212°F |
| 273.15 K | to °C | 0°C |
How to interpret the result
Celsius and Fahrenheit have different zero points and scales. Kelvin starts at absolute zero, so temperature conversion can include both scaling and offset.
Common mistakes
- Fahrenheit and Celsius conversion is not just multiplication.
- Kelvin cannot be below 0.
- The offset between °C and K is 273.15.
How to use
Using the temperature conversion calculator is easy and intuitive. First, enter the temperature value you want to convert in the input box. Then, select the unit for the current temperature (Celsius, Fahrenheit, or Kelvin) from the drop-down menu.
After clicking the "Convert" button, the calculator will immediately display the corresponding values of the temperature in all other units. For example, if you enter 100 degrees Celsius, the system will automatically calculate the corresponding 212 degrees Fahrenheit and 373.15 Kelvin.
You can also view the simultaneous display of multiple units directly in the results area for easy comparison. If you need to make a new conversion, just clear the input box and re-enter. The calculator supports decimal input and can process temperature values accurate to multiple digits after the decimal point, meeting the accuracy requirements of scientific calculations.
Main features
This temperature conversion calculator has many useful features. Supports two-way conversion between three major temperature scales: Celsius (°C), Fahrenheit (°F) and Kelvin (K), covering all needs of daily life and scientific research.
Standard physical conversion formulas are used to ensure that the conversion accuracy reaches two decimal places and meets professional calculation requirements. The real-time conversion function allows you to see the results as you enter the values without waiting. The interface design is simple and clear, and the results of all temperature units are displayed simultaneously for quick comparison and viewing.
The calculator is completely free to use, no registration required, just open the webpage and use it. Supports negative temperature value input, which can handle low-temperature scenes in extremely cold weather or scientific experiments. Perfectly compatible with mobile and desktop, temperature conversion can be performed anytime and anywhere.
Use cases
Temperature conversion calculators are widely used in multiple scenarios. In daily life, when viewing foreign weather forecasts, you can convert Fahrenheit to familiar Celsius to help you better understand the local temperature. When cooking enthusiasts use foreign recipes, they can convert the oven temperature from Fahrenheit to Celsius to ensure baking results.
In the fields of scientific research and education, physical and chemical experiments often require conversion between different temperature units, especially when involving thermodynamic calculations, the Kelvin temperature scale is required. When engineering and technical personnel consult international standards or technical documents, they often need to convert temperature units.
In the medical and health field, body temperature measurement results may be displayed in different units, and conversion tools help to accurately understand body temperature data. International travelers can quickly learn how the temperature is actually felt at their destination. When weather enthusiasts analyze global climate data, they need to unify the temperature units used in different regions.