Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius instantly with our free online calculator. Essential for understanding weather forecasts, cooking temperatures, scientific calculations, and travel to metric countries.
Conversion Formulas
| Conversion | Formula | Example |
|---|---|---|
| °F to °C | (°F - 32) × 5/9 | 68°F = 20°C |
| °C to °F | (°C × 9/5) + 32 | 20°C = 68°F |
Temperature Reference Chart
| Fahrenheit | Celsius | Condition |
|---|---|---|
| 32°F | 0°C | Water freezes |
| 50°F | 10°C | Cool weather |
| 68°F | 20°C | Room temperature |
| 77°F | 25°C | Warm weather |
| 98.6°F | 37°C | Body temperature |
| 100°F | 37.8°C | Hot weather |
| 212°F | 100°C | Water boils |
Cooking Temperature Guide
| Fahrenheit | Celsius | Cooking Use |
|---|---|---|
| 250°F | 121°C | Slow roasting |
| 325°F | 163°C | Baking cakes |
| 350°F | 177°C | Standard baking |
| 375°F | 191°C | Roasting |
| 400°F | 204°C | High-heat roasting |
| 425°F | 218°C | Pizza, bread |
| 450°F | 232°C | Very high heat |
| 500°F | 260°C | Broiling |
Quick Mental Conversion
For approximate conversions:
- °F to °C: Subtract 30, then divide by 2
- °C to °F: Multiply by 2, then add 30
Conversion Code Example
``javascript
function fahrenheitToCelsius(f) {
return (f - 32) * 5 / 9;
}
function celsiusToFahrenheit(c) {
return (c * 9 / 5) + 32;
}
// Examples
console.log(fahrenheitToCelsius(68)); // 20
console.log(celsiusToFahrenheit(20)); // 68
``
Weather Interpretation
| Temp Range | Fahrenheit | Celsius | Feel |
|---|---|---|---|
| Freezing | < 32°F | < 0°C | Ice, snow |
| Cold | 32-50°F | 0-10°C | Winter coat |
| Cool | 50-65°F | 10-18°C | Light jacket |
| Comfortable | 65-75°F | 18-24°C | T-shirt |
| Warm | 75-85°F | 24-30°C | Summer clothes |
| Hot | 85-100°F | 30-38°C | Stay cool |
| Extreme | > 100°F | > 38°C | Dangerous heat |