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Celsius to Fahrenheit Converter - Free Online Temperature Calculator
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Celsius to Fahrenheit Converter
Convert temperatures between Celsius (°C) and Fahrenheit (°F) instantly. Essential for science education, international recipes, and weather comparisons.
Visual Temperature Scale
🌡️ Common Temperature References
| Description | Celsius (°C) | Fahrenheit (°F) |
|---|---|---|
| Water freezes | 0°C | 32°F |
| Room temperature | 20-22°C | 68-72°F |
| Body temperature | 37°C | 98.6°F |
| Hot bath | 40-45°C | 104-113°F |
| Water boils | 100°C | 212°F |
📐 Conversion Formulas
Celsius to Fahrenheit
°F = (°C × 9/5) + 32
Multiply by 9/5 (or 1.8), then add 32
Fahrenheit to Celsius
°C = (°F - 32) × 5/9
Subtract 32, then multiply by 5/9
How to use this calculator
🌡️ How to Use This Calculator
- Enter a temperature value in either Celsius or Fahrenheit
- The conversion happens automatically as you type
- Use the quick buttons for common temperatures
- View your temperature on the visual scale
- Check the reference table for common conversions
📐 Conversion Formulas
Celsius to Fahrenheit:
°F = (°C × 9/5) + 32
Or: °F = (°C × 1.8) + 32
Fahrenheit to Celsius:
°C = (°F - 32) × 5/9
Or: °C = (°F - 32) ÷ 1.8
🌟 Practical Examples
Science Class
- • Water freezes: 0°C = 32°F
- • Water boils: 100°C = 212°F
- • Absolute zero: -273.15°C = -459.67°F
- • Dry ice: -78.5°C = -109.3°F
Daily Life
- • Room temp: 20-22°C = 68-72°F
- • Body temp: 37°C = 98.6°F
- • Fever: 38°C = 100.4°F
- • Hot coffee: 60°C = 140°F
💡 Teaching Tips
- • Remember the key points: 0°C = 32°F (freezing) and 100°C = 212°F (boiling)
- • Quick estimate: Double °C and add 30 for approximate °F
- • For negative temperatures: Convert to positive, then make result negative
- • Room temperature is about 20°C or 68°F
- • Each 10°C change equals 18°F change
⚠️ Common Mistakes to Avoid
- • Don't forget to add/subtract 32 in the conversion
- • Remember: 9/5 = 1.8 and 5/9 ≈ 0.556
- • Celsius uses °C, not just C
- • Check your math with known values (0°C = 32°F)
- • Be careful with negative temperatures
About this calculator
Convert temperatures between Celsius and Fahrenheit instantly. Perfect for science classes, cooking, and weather comparisons.
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