Our free online temperature converter tool allows you to quickly convert between Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur temperature scales. Whether you need to convert f to c, c to f, or any other temperature unit, our calculator provides instant and accurate results for scientific calculations, cooking, weather forecasting, and everyday temperature conversions.
| Celsius (°C) | Fahrenheit (°F) | Kelvin (K) | Description |
|---|---|---|---|
| -273.15 | -459.67 | 0 | Absolute zero |
| -40 | -40 | 233.15 | Where C and F meet |
| 0 | 32 | 273.15 | Freezing point |
| 21 | 69.8 | 294.15 | Room temperature |
| 37 | 98.6 | 310.15 | Body temperature |
| 100 | 212 | 373.15 | Boiling point |
Temperature conversion is the process of changing temperature values from one scale to another. The most common conversions involve Celsius (°C), Fahrenheit (°F), and Kelvin (K). Our temperature converter tool makes this process simple and accurate, whether you're converting f to c, c to f, or any other temperature unit. This mathematical transformation is essential for international communication, scientific research, and everyday applications where different temperature scales are used.
Celsius, also known as centigrade, is the standard unit of temperature in the metric system. It's used worldwide for most temperature measurements. The Celsius scale is based on the freezing point (0°C) and boiling point (100°C) of water at standard atmospheric pressure. This intuitive scale makes it easy to understand temperature relationships in everyday life.
Fahrenheit is the temperature scale primarily used in the United States. It's based on a scale where water freezes at 32°F and boils at 212°F. The Fahrenheit scale is often used in weather forecasts and cooking in the US. While less intuitive than Celsius, it provides finer gradations for human comfort temperatures.
Kelvin is the base unit of temperature in the International System of Units (SI). It's an absolute temperature scale where 0 K represents absolute zero, the theoretical lowest possible temperature. Kelvin is commonly used in scientific research and calculations, particularly in physics and chemistry where absolute temperature measurements are required.
Understanding the mathematical relationships between temperature scales helps you verify conversions and understand the science behind temperature measurement. These formulas are based on the fundamental properties of each temperature scale and their reference points.
Formula: °F = (°C × 9/5) + 32
Example: 25°C = (25 × 9/5) + 32 = 77°F
Formula: °C = (°F - 32) × 5/9
Example: 77°F = (77 - 32) × 5/9 = 25°C
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