Unit of Measure Conversions
Temperature Scale Conversions
Additional Units and Information
| Name | Symbol | Value | Description/Notes |
|---|---|---|---|
| Celsius | °C |
Ice melts at 0°C*
Water boils at 100°C* |
|
| Fahrenheit | °F |
Ice melts at 32°F*
Water boils at 212°F* |
|
| Kelvin | K | 1 K = 1°C in size |
Ice melts at 273 K*
Water boils at 373 K* |
| Rankine | °R | 1°R = 1°F in size |
Ice melts at 492°R*
Water boils at 672°R* |
| Réaumur | °Ré |
Ice melts at 0°Ré*
Water boils at 80°Ré* |
|
| 36.9°C; 98.4°F |
Normal body temperature | ||
| 4.0°C; 39.2°F |
Water density is at maximum* | ||
| -273.15°C; -459.67°F |
0.0 K (Absolute Zero) |
Useful Approximations
| Approximation | % Accuracy |
|---|---|
| -15°C = 5°F | 100 |
| -10°C ≈ 15°F | 92.9 |
| -5°C ≈ 25°F | 91.3 |
| 0°C ≈ 30°F | 93.8 |
| 5°C ≈ 40°F | 97.6 |
| 10°C = 50°F | 100 |
| 15°C ≈ 60°F | 98.3 |
| 20°C ≈ 70°F | 97.1 |
| 25°C ≈ 75°F | 97.4 |
| 30°C ≈ 85°F | 98.8 |
| 35°C = 95°F | 100 |
| 40°C ≈ 105°F | 99.0 |
| 45°C ≈ 115°F | 98.2 |
| 50°C ≈ 120°F | 98.4 |
| Readily Recalled Values | % Accuracy |
| 04°C ≈ 40°F (just swap digits) | 98.0 |
| 16°C ≈ 61°F (swap digits) | 99.7 |
| 28°C ≈ 82°F (swap digits) | 99.5 |
| 40°C = 104°F (swap digits and prefix with 1) | 100 |
| 52°C ≈ 125°F (swap digits and prefix with 1) | 99.5 |