28 degrees Fahrenheit is equal to approximately -2.2222 degrees Celsius.
To convert 28°F to Celsius, you subtract 32 from the Fahrenheit value, then multiply by 5/9. This moves the freezing point of water from 32°F to 0°C and scales the temperature accordingly.
Conversion Tool
Result in celsius:
Conversion Formula
The formula to convert Fahrenheit to Celsius is: Celsius = (Fahrenheit – 32) × 5/9.
This formula works because the Fahrenheit and Celsius scales have different zero points and increments. Water freezes at 32°F but at 0°C, so subtracting 32 aligns the freezing points. The factor 5/9 converts the scale from Fahrenheit degrees to Celsius degrees, since there are 180 Fahrenheit degrees between freezing and boiling points, and 100 Celsius degrees in the same range.
Example calculation for 28°F:
- Subtract 32: 28 – 32 = -4
- Multiply by 5/9: -4 × 5/9 = -20/9 ≈ -2.2222
- So, 28°F is about -2.2222°C
Conversion Example
- 45°F to Celsius:
- Subtract 32: 45 – 32 = 13
- Multiply by 5/9: 13 × 5/9 ≈ 7.2222
- Result: 45°F ≈ 7.2222°C
- 10°F to Celsius:
- Subtract 32: 10 – 32 = -22
- Multiply by 5/9: -22 × 5/9 ≈ -12.2222
- Result: 10°F ≈ -12.2222°C
- 100°F to Celsius:
- Subtract 32: 100 – 32 = 68
- Multiply by 5/9: 68 × 5/9 ≈ 37.7778
- Result: 100°F ≈ 37.7778°C
- 0°F to Celsius:
- Subtract 32: 0 – 32 = -32
- Multiply by 5/9: -32 × 5/9 ≈ -17.7778
- Result: 0°F ≈ -17.7778°C
Conversion Chart
The table below shows Fahrenheit temperatures from 3.0 to 53.0 degrees, with their Celsius equivalents. You can find a Fahrenheit value and see the corresponding Celsius without doing calculations yourself.
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 3.0 | -16.1111 |
| 13.0 | -10.5556 |
| 23.0 | -5.0000 |
| 28.0 | -2.2222 |
| 33.0 | 0.5556 |
| 38.0 | 3.3333 |
| 43.0 | 6.1111 |
| 48.0 | 8.8889 |
| 53.0 | 11.6667 |
Related Conversion Questions
- What is 28 degrees Fahrenheit in Celsius without a calculator?
- How cold is 28°F compared to Celsius temperatures?
- Is 28°F below freezing in Celsius?
- How to convert 28°F to Celsius using mental math?
- Why does 28°F convert to a negative Celsius number?
- What Celsius temperature matches 28 degrees Fahrenheit exactly?
- How does 28°F compare to room temperature in Celsius?
Conversion Definitions
Fahrenheit: Fahrenheit is a temperature scale where water freezes at 32 degrees and boils at 212 degrees under standard atmospheric conditions. It was invented by Daniel Gabriel Fahrenheit in the early 18th century and remains used mainly in the United States and few other countries for everyday temperature measurement.
Celsius: Celsius is a temperature scale based on water’s freezing point at 0 degrees and boiling point at 100 degrees under standard atmospheric pressure. It is used worldwide in science and most countries for weather and temperature readings, providing a decimal-based system that’s easier to calculate.
Conversion FAQs
Why is the freezing point 32°F but 0°C?
The Fahrenheit scale sets 32 as the freezing point of water because its creator chose it based on a mixture of ice, water, and salt for zero, then adjusted the scale to make water freeze at 32. Celsius uses a simpler decimal system where water freezes at 0, making it easier for scientific use.
Can I convert Fahrenheit to Celsius by just subtracting 30?
Subtracting 30 from Fahrenheit gives a rough estimate, but not accurate. The exact formula involves subtracting 32 and multiplying by 5/9. The 30 subtraction is a shortcut but leads to errors, especially at lower or higher temperatures.
Why does the formula multiply by 5/9?
The multiplication by 5/9 adjusts for the different size of degrees between scales. Fahrenheit degrees are smaller, with 180 units between freezing and boiling of water, while Celsius has 100 units. Multiplying by 5/9 scales the difference properly.
Is negative Celsius temperature normal when converting from Fahrenheit?
Yes, because Fahrenheit values below 32 correspond to Celsius temperatures below zero. Temperatures like 28°F equal approximately -2.2°C, showing below freezing conditions on the Celsius scale.
How precise is the conversion using this formula?
The formula provides precise conversions when using decimals. Rounding can introduce small errors, but using decimal places (like four digits) gives a very accurate result for practical uses.
