Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin. Enter a temperature value and select the input and output units for instant conversion. Free online temperature converter.
Temperature converter
Result
What is this?
A temperature converter converts between Celsius (°C), Fahrenheit (°F), and Kelvin (K). Water freezes at 0°C (32°F, 273.15 K) and boils at 100°C (212°F, 373.15 K). Kelvin is used in science and has no negative values—absolute zero is 0 K. Celsius is used in most of the world; Fahrenheit is common in the US. The formulas are linear between units, so conversion is straightforward. The calculator handles negative temperatures and decimals.
When to use
Use for weather (F to C), cooking (oven temps), science (Kelvin), or travel. Example: 25°C = 77°F; 0°C = 273.15 K. Body temp 98.6°F = 37°C. Travelers convert weather forecasts. Cooks convert oven temperatures between recipes. Scientists work in Kelvin for physics and chemistry. Medical settings may use different scales. Anyone dealing with temperature across regions or disciplines needs this.
How to use
Enter a temperature and select the source and target units. Formulas: °F = (°C × 9/5) + 32, K = °C + 273.15.
Frequently asked questions
- °F = (°C × 9/5) + 32. For example, 25°C = (25 × 9/5) + 32 = 77°F.
- 0°C = 273.15 K. The formula is K = °C + 273.15.