The Fahrenheit to Celsius Calculator converts temperatures from Fahrenheit (°F) to Celsius (°C) using the standard formula. Fahrenheit is primarily used in the United States, while Celsius is the global standard for science and everyday temperature measurement. This calculator provides step‑by‑step explanations, making it ideal for students, travelers, and anyone needing accurate temperature conversions. You can also convert from Celsius to Fahrenheit by toggling the mode.
Fahrenheit to Celsius Formula
Formula: °C = (°F - 32) × 5/9
Example: 32°F → (32 - 32) × 5/9 = 0°C
Example: 212°F → (212 - 32) = 180, 180 × 5/9 = 100°C
How to Convert Fahrenheit to Celsius (Step‑by‑Step)
- Start with the temperature in Fahrenheit (°F).
- Subtract 32 from the value.
- Multiply the result by 5/9 (or 0.5556).
- The final number is the temperature in Celsius (°C).
Example: 68°F → 68 - 32 = 36, then 36 × 5/9 = 20°C.
Reverse Conversion – Celsius to Fahrenheit
Formula: °F = (°C × 9/5) + 32
Example: 0°C → 0 × 9/5 = 0, then 0 + 32 = 32°F
Example: 100°C → 100 × 9/5 = 180, then 180 + 32 = 212°F
Common Temperature Reference Points
| Description | °F | °C |
|---|---|---|
| Absolute zero | -459.67 | -273.15 |
| Water freezes | 32 | 0 |
| Body temperature (approx.) | 98.6 | 37 |
| Room temperature | 68-72 | 20-22 |
| Water boils | 212 | 100 |
Real‑World Applications
- Travel: Understanding weather forecasts when visiting the US (Fahrenheit) vs. other countries (Celsius).
- Cooking: Converting oven temperatures from recipes using different scales.
- Science & engineering: Working with international data or standards.
- Health: Interpreting body temperature readings (fever thresholds in both scales).