Fahrenheit ↔ Celsius Converter
Convert between Fahrenheit and Celsius instantly
Enter Fahrenheit value to convert to Celsius
Enter Celsius value to convert to Fahrenheit
Conversion Result
68°F = 20°C
Room temperature • 293.15 Kelvin
📚 Fahrenheit ↔ Celsius Conversion Details
Fahrenheit to Celsius Formula
°C = (°F - 32) × 5/9
Subtract 32 from Fahrenheit, then multiply by 5/9 to get Celsius.
Celsius to Fahrenheit Formula
°F = (°C × 9/5) + 32
Multiply Celsius by 9/5, then add 32 to get Fahrenheit.
Key Temperature Points
- Water Freezes: 32°F = 0°C
- Water Boils: 212°F = 100°C
- Body Temp: 98.6°F = 37°C
- Same Temp: -40°F = -40°C
Common Uses
- Cooking temperatures
- Weather forecasts
- Medical measurements
- Scientific experiments
🌡️ How This Converter Works
This is a bidirectional converter that works in real-time:
- Fahrenheit → Celsius: When you type in the °F field, the °C field automatically updates
- Celsius → Fahrenheit: When you type in the °C field, the °F field automatically updates
- No swapping needed: Both conversions happen simultaneously
- Real-time: Updates happen as you type, no button clicks required
// Bidirectional Conversion Logic:
°C = (°F - 32) × 5/9
°F = (°C × 9/5) + 32
// Example 1: Type "68" in Fahrenheit
°C = (68 - 32) × 5/9 = 20°C
// Example 2: Type "25" in Celsius
°F = (25 × 9/5) + 32 = 77°F
°C = (°F - 32) × 5/9
°F = (°C × 9/5) + 32
// Example 1: Type "68" in Fahrenheit
°C = (68 - 32) × 5/9 = 20°C
// Example 2: Type "25" in Celsius
°F = (25 × 9/5) + 32 = 77°F
📊 Temperature Comparison Table
| Description | Fahrenheit | Celsius |
|---|---|---|
| Absolute Zero | -459.67°F | -273.15°C |
| Water Freezes | 32°F | 0°C |
| Room Temperature | 68°F | 20°C |
| Body Temperature | 98.6°F | 37°C |
| Water Boils | 212°F | 100°C |
| Same Temperature | -40°F | -40°C |
❓ Frequently Asked Questions
Q: How do I convert Fahrenheit to Celsius?
A: Use the formula: °C = (°F - 32) × 5/9. Or just type in the Fahrenheit field above and see the Celsius result instantly.
Q: What is 100°F in Celsius?
A: 100°F is approximately 37.78°C. This is close to normal human body temperature.
Q: Why does -40°F equal -40°C?
A: This is the point where the two temperature scales intersect. It's the only temperature where Fahrenheit and Celsius have the same numerical value.
Q: Which countries use Fahrenheit?
A: Fahrenheit is primarily used in the United States, Belize, Cayman Islands, and Palau. Most other countries use Celsius.