Fahrenheit to Celsius Converter
Temperature converter
Convert single or batch values with consistent precision and formula trust notes.
Converted temperature
-17.777778C
Converted from Fahrenheit (F) to Celsius (C) at 6-decimal precision.
InputsSingle valueF -> CLive
Single value
Single valueLive conversion
Live conversionFormula: C = (F - 32) × 5/9
Assumptions: Values below -459.67 F are rejected because they are below absolute zero.
Quick conversions
Precision options
Outputs and reference details
All-scale outputs
Celsius
-17.777778 C
Fahrenheit
0 F
Kelvin
255.372222 K
17.778 C below freezing • 117.778 C below boiling
Reference points
- Water freezing point: 0 C = 32 F = 273.15 K
- Water boiling point: 100 C = 212 F = 373.15 K
- Average body temperature: 37 C = 98.6 F = 310.15 K
Fahrenheit to Celsius reference points
US weather, oven, and science anchor points with Celsius equivalents.
| Use case | Celsius | Fahrenheit | Context |
|---|---|---|---|
| Scale crossover | -40 C | -40 F | science |
| Freezing point | 0 C | 32 F | weather |
| Cool day | 10 C | 50 F | weather |
| Warm day | 24 C | 75.2 F | weather |
| Body temperature | 37 C | 98.6 F | health |
| Rare steak | 52 C | 125.6 F | cooking |
| Baking temperature | 180 C | 356 F | cooking |
| Boiling point | 100 C | 212 F | science |
Formula
C = (F - 32) × 5/9 - Subtract 32 from Fahrenheit first.
- Multiply by 5/9.
- Result is Celsius.
Example
Worked example: 77 F to C
- 1 77 - 32 = 45
- 2 45 × 5/9 = 25
- 3 Result unit = C
77 F equals 25 C.
How
- Enter Fahrenheit value.
- Keep From as F and To as C, or swap scales when needed.
- Use sanity-check chips (`-40`, `32`, `68`, `98.6`, `212`) to validate expected outputs quickly.
- Review Celsius result live, then copy result/report details.
Avoid
- Dividing by 9/5 instead of multiplying by 5/9.
- Skipping subtraction of 32.
- Entering values below absolute zero (-459.67 F).
Table
| Conversion | Result |
|---|---|
| 32 F to C | 0 C |
| 50 F to C | 10 C |
| 68 F to C | 20 C |
| 77 F to C | 25 C |
| 98.6 F to C | 37 C |
| 212 F to C | 100 C |
FAQ
Can this convert freezing point?
Yes, 32 F converts to 0 C.
Can I input decimals?
Yes. Decimal, comma-formatted, and scientific-notation Fahrenheit values are supported.
Does this include Kelvin?
Yes, you can switch scales in the converter to include Kelvin pairs when needed.
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