How temperature conversion works
Unlike length or weight, temperature scales don’t share a zero, so you can’t just multiply by a ratio. Each value is converted through Celsius, shifting by the offset between scales.
Common values
| Value (C) | Result |
|---|---|
| 10 C | 50 °F |
| 25 C | 77 °F |
| 50 C | 122 °F |
| 100 C | 212 °F |
| 150 C | 302 °F |
| 200 C | 392 °F |
| 300 C | 572 °F |
| 500 C | 932 °F |
| 1,000 C | 1832 °F |
More detail
Key reference points
Water freezes at 0 °C = 32 °F = 273.15 K and boils at 100 °C = 212 °F = 373.15 K. Absolute zero is 0 K = −273.15 °C. The Celsius and Fahrenheit scales cross at −40°, where both read the same number.
Quick estimates. Handy anchors: room temperature 20 °C ≈ 68 °F, body temperature 37 °C ≈ 98.6 °F, and a 180 °C oven ≈ 356 °F. Memorizing a few lets you sanity-check a conversion at a glance.
Frequently asked questions
What is the Celsius to Fahrenheit formula?
°F = °C × 9/5 + 32. To go the other way, °C = (°F − 32) × 5/9.
What is 36.5°C body temperature in Fahrenheit?
36.5°C = 97.7°F, using °F = °C × 9/5 + 32.
Is it true that −40°C equals −40°F?
Yes — Celsius and Fahrenheit are the only two scales that cross, and they cross at exactly −40 degrees on both.
Why doesn't Kelvin use a degree symbol?
Kelvin is an absolute SI base unit, not a relative scale, so by international convention (since 1967) it's written as "K", not "°K".