80 degrees Fahrenheit is equal to 26.6667 degrees Celsius.
Table of Contents
The conversion from Fahrenheit to Celsius is done by 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 to Celsius is: C = (F – 32) × 5/9. This works because the Fahrenheit and Celsius scales have different zero points and increments. Fahrenheit sets its zero at the freezing point of a salty brine, while Celsius defines zero at water’s freezing point.
To break down the formula:
- Subtract 32 from the Fahrenheit value to align zero points.
- Multiply the result by 5, because each Celsius degree covers a smaller temperature change.
- Divide by 9, since 180 Fahrenheit degrees equal 100 Celsius degrees, making the ratio 5/9.
For example, with 80°F:
(80 – 32) × 5/9 = 48 × 5/9 = 240/9 = 26.6667 °C
Conversion Example
- Convert 100°F to Celsius:
- Subtract 32: 100 – 32 = 68
- Multiply by 5: 68 × 5 = 340
- Divide by 9: 340 ÷ 9 ≈ 37.7778 °C
- Convert 60°F to Celsius:
- Subtract 32: 60 – 32 = 28
- Multiply by 5: 28 × 5 = 140
- Divide by 9: 140 ÷ 9 ≈ 15.5556 °C
- Convert 90°F to Celsius:
- Subtract 32: 90 – 32 = 58
- Multiply by 5: 58 × 5 = 290
- Divide by 9: 290 ÷ 9 ≈ 32.2222 °C
- Convert 75°F to Celsius:
- Subtract 32: 75 – 32 = 43
- Multiply by 5: 43 × 5 = 215
- Divide by 9: 215 ÷ 9 ≈ 23.8889 °C
Conversion Chart
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 55.0 | 12.7778 |
| 60.0 | 15.5556 |
| 65.0 | 18.3333 |
| 70.0 | 21.1111 |
| 75.0 | 23.8889 |
| 80.0 | 26.6667 |
| 85.0 | 29.4444 |
| 90.0 | 32.2222 |
| 95.0 | 35.0000 |
| 100.0 | 37.7778 |
| 105.0 | 40.5556 |
To use the chart, find the Fahrenheit temperature in the left column and read the equivalent Celsius temperature on the right. This is handy for quick reference without calculations.
Related Conversion Questions
- What temperature in Celsius equals 80 degrees Fahrenheit?
- How do I convert 80°F to °C manually?
- Is 80 Fahrenheit warm or cool in Celsius?
- What’s the Celsius equivalent of 80 degrees Fahrenheit for cooking?
- How many Celsius degrees are in 80°F when measuring body temperature?
- Can I use the formula for 80°F to find Celsius in a calculator?
- Why does 80°F convert to 26.6667°C and not a whole number?
Conversion Definitions
Fahrenheit: Fahrenheit is a temperature scale based on 32 degrees as the freezing point of water and 212 degrees as boiling point at sea level. Commonly used in the United States, it divides the temperature range between freezing and boiling into 180 equal parts called degrees.
Celsius: Celsius is a temperature scale where 0 degrees marks the freezing point of water and 100 degrees the boiling point at standard atmospheric pressure. It is widely used globally, especially in scientific and everyday temperature measuring.
Conversion FAQs
Why isn’t 80°F conversion to Celsius a whole number?
Because the Celsius scale uses increments different from Fahrenheit, the conversion results in decimal values. The formula involves multiplying by 5/9, which often produces fractional numbers unless the Fahrenheit temperature matches certain values.
Can I convert Fahrenheit to Celsius without a calculator?
You can estimate by subtracting 30 from the Fahrenheit number and halving the result, but this is rough. For exact values like 80°F, using the formula or a calculator is better to get precise Celsius values.
Is the conversion formula valid for negative temperatures?
Yes, the formula works across all temperatures, including below freezing. For example, -40°F converts exactly to -40°C, which is the only point where both scales intersect.
Why do different countries use Fahrenheit or Celsius?
The choice comes from historical and practical reasons. The US retains Fahrenheit due to tradition, while most other countries adopted Celsius for its simpler decimal-based system aligned with metric units.
Does converting 80°F to Celsius affect scientific measurements?
When precision is critical, converting temperatures must use exact formulas and decimal places, because even small rounding errors can impact scientific results. 80°F to 26.6667°C is precise enough for many practical uses.