Temperature Conversion Formula
Convert temperatures between Celsius, Fahrenheit, and Kelvin using mathematical formulas. Evaluate conversion expressions for common temperature values.
Conversion
Detailed Explanation
Temperature Conversion Formulas
Three temperature scales are commonly used worldwide. The evaluator lets you type any conversion formula directly.
Celsius to Fahrenheit
F = C * 9/5 + 32
Examples:
0 * 9/5 + 32 = 32 (freezing point)
100 * 9/5 + 32 = 212 (boiling point)
37 * 9/5 + 32 = 98.6 (body temperature)
20 * 9/5 + 32 = 68 (room temperature)
Fahrenheit to Celsius
C = (F - 32) * 5/9
Examples:
(72 - 32) * 5/9 = 22.22 (comfortable indoor)
(98.6 - 32) * 5/9 = 37 (body temperature)
(451 - 32) * 5/9 = 232.78 (paper ignition)
Celsius to Kelvin
K = C + 273.15
Examples:
0 + 273.15 = 273.15 (freezing point)
-273.15 + 273.15 = 0 (absolute zero)
100 + 273.15 = 373.15 (boiling point)
Fahrenheit to Kelvin
Combine both formulas:
K = (F - 32) * 5/9 + 273.15
Example: 72 F to Kelvin:
(72 - 32) * 5/9 + 273.15 = 295.37
Quick Reference
| Celsius | Fahrenheit | Kelvin |
|---|---|---|
| -40 | -40 | 233.15 |
| 0 | 32 | 273.15 |
| 20 | 68 | 293.15 |
| 37 | 98.6 | 310.15 |
| 100 | 212 | 373.15 |
Use Case
A traveler converting weather forecasts between Celsius and Fahrenheit, or a scientist converting laboratory measurements to Kelvin.