80 degrees Fahrenheit is equal to 26.6667 degrees Celsius.
The conversion from Fahrenheit to Celsius involves subtracting 32 from the Fahrenheit temperature, then multiplying the result by 5/9. This formula adjusts for the different zero points and scaling between the two temperature units.
Conversion Tool
Result in celsius:
Conversion Formula
The formula to convert Fahrenheit (F) to Celsius (C) is:
C = (F – 32) × 5/9
This formula works because Fahrenheit and Celsius scales have different starting points and increments. The Fahrenheit scale sets freezing water at 32°F, while Celsius sets it at 0°C. Also, the size of one Fahrenheit degree is smaller than a Celsius degree by the ratio 5/9.
For example, converting 80°F to Celsius:
- Subtract 32 from 80: 80 – 32 = 48
- Multiply 48 by 5/9: 48 × 5/9 = 26.6667
- So, 80°F equals approximately 26.67°C
Conversion Example
- Convert 100°F to Celsius:
- Subtract 32: 100 – 32 = 68
- Multiply by 5/9: 68 × 5/9 = 37.7778
- Result: 37.78°C
- Convert 60°F to Celsius:
- Subtract 32: 60 – 32 = 28
- Multiply by 5/9: 28 × 5/9 = 15.5556
- Result: 15.56°C
- Convert 72°F to Celsius:
- Subtract 32: 72 – 32 = 40
- Multiply by 5/9: 40 × 5/9 = 22.2222
- Result: 22.22°C
- Convert 90°F to Celsius:
- Subtract 32: 90 – 32 = 58
- Multiply by 5/9: 58 × 5/9 = 32.2222
- Result: 32.22°C
Conversion Chart
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 55.0 | 12.78 |
| 60.0 | 15.56 |
| 65.0 | 18.33 |
| 70.0 | 21.11 |
| 75.0 | 23.89 |
| 80.0 | 26.67 |
| 85.0 | 29.44 |
| 90.0 | 32.22 |
| 95.0 | 35.00 |
| 100.0 | 37.78 |
| 105.0 | 40.56 |
To use the chart, locate the Fahrenheit value in the left column, then read across to find the corresponding Celsius value. This gives a quick reference without calculating manually.
Related Conversion Questions
- How do I convert 80 degrees Fahrenheit into Celsius?
- What is 80°F in Celsius temperature scale?
- Is 80°F considered warm or cool in Celsius?
- What formula converts 80 Fahrenheit to Celsius?
- How many Celsius degrees equal 80 degrees Fahrenheit?
- Can you show me the math for converting 80°F to Celsius?
- What temperature in Celsius corresponds to 80 degrees Fahrenheit?
Conversion Definitions
Fahrenheit: Fahrenheit is a temperature scale where water freezes at 32 degrees and boils at 212 degrees under standard atmospheric pressure. The scale divides the interval between freezing and boiling into 180 equal parts called degrees, used mainly in the United States and a few other countries.
Celsius: Celsius is a temperature scale defining 0 degrees as the freezing point of water and 100 degrees as boiling point at sea level. Each degree Celsius represents an equal increment in temperature, used worldwide for scientific and everyday temperature measurements except in some countries.
Conversion FAQs
Why does the Fahrenheit scale start at 32 for freezing water?
The Fahrenheit scale sets freezing water at 32 degrees due to its original design by Daniel Gabriel Fahrenheit in the early 18th century. He chose this value based on a mixture of ice, water, and salt to create a reproducible low temperature point. This baseline differs from the Celsius freezing point.
Can I use the conversion formula for negative Fahrenheit values?
Yes, the formula C = (F – 32) × 5/9 works for all Fahrenheit values, including negatives. Since it is a linear transformation, subtracting 32 then multiplying by 5/9 converts any temperature accurately, whether above or below freezing.
Why multiply by 5/9 after subtracting 32?
The subtraction adjusts the zero point between scales, and multiplying by 5/9 scales the temperature difference correctly. Fahrenheit degrees are smaller than Celsius ones by this ratio, so the multiplication converts the unit size between the two.
Is the conversion formula reversible?
Yes, converting back from Celsius to Fahrenheit uses the inverse formula: F = C × 9/5 + 32. This reverses the steps to get the original Fahrenheit value from Celsius.
Are there any shortcuts to convert 80°F to Celsius mentally?
Approximations can be made by subtracting 30 from the Fahrenheit value and halving the result. For 80°F, 80 – 30 = 50, half is 25°C; this is close to the exact 26.67°C but less precise. Such shortcuts help quick estimates in everyday situations.