25 Fahrenheit to Celsius
Quick answer
25 Fahrenheit (°F) equals
-3.888889 °C
To convert 25 degrees Fahrenheit to degrees Celsius, multiply by -17.2222222222. Therefore, 25 Fahrenheit (°F) equals -3.888889 Celsius (°C).
Formula: °C = (°F - 32) × 5/9. Calculation: -3.888889 °C. Reverse: °F = (°C × 9/5) + 32.
Convert Fahrenheit (°F) to Celsius (°C) online with our free unit converter. Calculated using formula: °C = (°F - 32) × 5/9. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Fahrenheit to Celsius
- Step 1 — start with the formula. °C = (°F - 32) × 5/9
- Step 2 — substitute your figure. Apply the formula to 25 °F.
- Step 3 — read the result. 25 °F = -3.888889 °C
- Step 4 — check it in reverse. °F = (°C × 9/5) + 32 returns 25 °F, which matches the figure you started with.
Temperature Converter
5 units available
25 °F = -3.888889 °C
Formula:
°C = (°F - 32) × 5/9With your value: 25 °F = -3.88888889 °C
Other Fahrenheit to Celsius conversions
Fahrenheit to Celsius Conversion Table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 0.5 | -17.5 |
| 1 | -17.222222 |
| 2 | -16.666667 |
| 5 | -15 |
| 10 | -12.222222 |
| 15 | -9.444444 |
| 20 | -6.666667 |
| 25 | -3.888889 |
| 50 | 10 |
| 100 | 37.777778 |
| 250 | 121.111111 |
| 500 | 260 |
| 1000 | 537.777778 |
Celsius to Fahrenheit Conversion Table
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| 0.5 | 32.9 |
| 1 | 33.8 |
| 2 | 35.6 |
| 5 | 41 |
| 10 | 50 |
| 15 | 59 |
| 20 | 68 |
| 25 | 77 |
| 50 | 122 |
| 100 | 212 |
| 250 | 482 |
| 500 | 932 |
| 1000 | 1,832 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Fahrenheit (°F)
Temperature
°F = °C × 9/5 + 32 exactly; the conversion is affine, not a single multiplying factor.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Celsius (°C)
Temperature
t/°C = T/K − 273.15. The degree Celsius has exactly the same magnitude as the kelvin.
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Standards and context behind Fahrenheit to Celsius
- ITS-90
- The International Temperature Scale of 1990 defines how both scales are realised in practice.
- Anders Celsius / Daniel Fahrenheit
- The scales are named for their 18th-century originators; Celsius's original scale ran inverted.
- −40°
- The single point where both scales read the same number.
How to Convert Fahrenheit to Celsius
This conversion uses an offset formula, so it cannot be described by a single multiplication factor.
Formula: °C = (°F - 32) × 5/9
Reverse: °F = (°C × 9/5) + 32
Step-by-Step Example
- Start with your value in Fahrenheit. For example: 5 °F
- Apply °C = (°F - 32) × 5/9
- The result is: -15 °C
Fahrenheit and Celsius Relationship
This conversion bridges the US Customary / Imperial and Metric (SI) measurement systems, commonly required when translating scientific data, international engineering specifications, or trade standards. Unlike simple multiplicative factors, this conversion follows an affine calculation model: °C = (°F - 32) × 5/9. Understanding the relationship between Fahrenheit and Celsius is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Fahrenheit
The Fahrenheit scale sets 32°F as the freezing point and 212°F as the boiling point of water. It is primarily used in the United States.
Fun Fact: Daniel Fahrenheit chose 96°F as his upper reference point, based on human body temperature (which he measured slightly inaccurately).
Common uses of Fahrenheit: weather (US), cooking (US), HVAC.
About Celsius
The Celsius scale sets 0°C as the freezing point and 100°C as the boiling point of water at standard pressure. It is used by most countries worldwide.
Fun Fact: Anders Celsius originally proposed a scale where 100° was freezing and 0° was boiling—it was later reversed!
Common uses of Celsius: weather, cooking, science.
Frequently Asked Questions
- What is 25 Fahrenheit in Celsius?
- 25 Fahrenheit equals -3.888889 Celsius.
- How many degrees Celsius are in 1 Fahrenheit?
- There are exactly -17.2222222222 degrees Celsius in 1 Fahrenheit.
- What is the formula to convert Fahrenheit to Celsius?
- The formula to convert Fahrenheit to Celsius is: °C = (°F - 32) × 5/9. For example, to convert 10 degrees Fahrenheit to degrees Celsius, you would apply the formula to 10.
- What is a Fahrenheit?
- The Fahrenheit scale sets 32°F as the freezing point and 212°F as the boiling point of water. It is primarily used in the United States.
- What is a Celsius?
- The Celsius scale sets 0°C as the freezing point and 100°C as the boiling point of water at standard pressure. It is used by most countries worldwide.
- What are the common uses of Fahrenheit?
- The Fahrenheit is commonly used in weather (US), cooking (US), HVAC.
- Why can't Celsius to Fahrenheit be a single multiplication?
- The two scales have different zero points, so the conversion needs both a scale factor (9/5) and an offset (+32).
- At what temperature are Celsius and Fahrenheit equal?
- At −40 degrees: −40 °C = −40 °F.
Related Temperature Conversions
Cite this page
UnitConvertLab. (2026). 25 Fahrenheit to Celsius. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/25-fahrenheit-to-celsius