55°F is equal to 12.7778°C.
To convert 55 degrees Fahrenheit to Celsius, you subtract 32 from the Fahrenheit value, then multiply the result by 5/9. This method adjusts for the difference in the two temperature scales’ starting points and increments.
Conversion Tool
Result in celcius:
Conversion Formula
The formula to convert Fahrenheit (f) to Celsius (celcius) is: C = (F – 32) × 5/9. This works by first removing the 32 offset that Fahrenheit scale has compared to Celsius. Then, it multiplies the difference by the fraction 5/9 because Celsius degrees are larger than Fahrenheit degrees.
For example, to convert 55°F:
- Subtract 32 from 55: 55 – 32 = 23
- Multiply 23 by 5/9: 23 × 5/9 = 115/9 ≈ 12.7778
- So, 55°F equals approximately 12.7778°C
Conversion Example
- Convert 68°F to Celsius:
- Subtract 32: 68 – 32 = 36
- Multiply by 5/9: 36 × 5/9 = 180/9 = 20
- Result: 68°F = 20°C
- Convert 100°F to Celsius:
- Subtract 32: 100 – 32 = 68
- Multiply by 5/9: 68 × 5/9 ≈ 37.7778
- Result: 100°F ≈ 37.7778°C
- Convert 40°F to Celsius:
- Subtract 32: 40 – 32 = 8
- Multiply by 5/9: 8 × 5/9 ≈ 4.4444
- Result: 40°F ≈ 4.4444°C
- Convert 77°F to Celsius:
- Subtract 32: 77 – 32 = 45
- Multiply by 5/9: 45 × 5/9 = 25
- Result: 77°F = 25°C
Conversion Chart
The chart below shows Fahrenheit temperatures from 30.0 to 80.0 degrees, converted to Celsius. You can find your Fahrenheit value and see the approximate Celsius equivalent, which helps quick reference without calculation.
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 30.0 | -1.1111 |
| 35.0 | 1.6667 |
| 40.0 | 4.4444 |
| 45.0 | 7.2222 |
| 50.0 | 10.0000 |
| 55.0 | 12.7778 |
| 60.0 | 15.5556 |
| 65.0 | 18.3333 |
| 70.0 | 21.1111 |
| 75.0 | 23.8889 |
| 80.0 | 26.6667 |
Related Conversion Questions
- What is 55 degrees Fahrenheit in Celsius exactly?
- How do I convert 55°F to Celsius manually?
- Is 55°F warm or cold in Celsius scale?
- What’s the Celsius equivalent of 55 Fahrenheit for cooking?
- How many Celsius degrees equal 55°F when measuring weather?
- Does 55°F convert to above or below room temperature in Celsius?
- Can I use the formula for 55°F to Celsius conversion in a calculator?
Conversion Definitions
f (Fahrenheit): Fahrenheit is a temperature scale where water freezes at 32 degrees and boils at 212 degrees under standard atmospheric pressure. It’s mostly used in the United States and some Caribbean countries for weather, cooking, and industrial measurements.
celcius (Celsius): Celsius is a temperature scale where water freezes at 0 degrees and boils at 100 degrees at sea level air pressure. Widely used globally, it’s the standard for scientific temperature measurements and daily temperature readings.
Conversion FAQs
Why does the Fahrenheit scale start at 32 for water freezing point?
The Fahrenheit scale sets 32 degrees as the freezing point of water based on early calibration experiments by its inventor, Daniel Gabriel Fahrenheit. This offset allows Fahrenheit degrees to cover a useful range comfortably for human-related temperatures, but it means conversion needs adjusting by subtracting 32 to align with Celsius.
Can I convert Fahrenheit to Celsius by just dividing by two?
Dividing Fahrenheit by two isn’t accurate for conversion. Because the scales have different zero points and degree sizes, you must first subtract 32 from Fahrenheit, then multiply the difference by 5/9. Dividing by two can only provide a loose estimation, but not precise results.
Why is the conversion factor 5/9 used in Fahrenheit to Celsius?
The 5/9 factor comes from the ratio of the size of a Celsius degree to a Fahrenheit degree. Fahrenheit divides the temperature between freezing and boiling of water into 180 parts, Celsius into 100 parts. So, each Celsius degree equals 9/5 Fahrenheit degrees, and the inverse (5/9) converts Fahrenheit differences back to Celsius.
What happens if I convert negative Fahrenheit temperatures?
The same formula applies for negative Fahrenheit values; subtract 32 and multiply by 5/9. Negative Fahrenheit values convert to negative Celsius values correctly, reflecting colder temperatures below freezing. No special adjustments needed besides applying the formula carefully.
Is rounding necessary after converting 55°F to Celsius?
Rounding depends on your precision needs. The exact result for 55°F is 12.7777…°C, but rounding to 12.78 or 13 is common for simplicity. For scientific or technical uses, more decimal places may be required, but general use tolerates rounding to two decimal places.