Convert Fahrenheit to Celsius – Temperature Converter
Use this converter to move seamlessly between fahrenheit and celsius with instant precision.
Interactive Converter
Convert between fahrenheit and celsius with precision rounding.
Quick reference table
| Fahrenheit | Celsius |
|---|---|
| 1 °F | -17.22 °C |
| 5 °F | -15 °C |
| 10 °F | -12.22 °C |
| 25 °F | -3.89 °C |
| 50 °F | 10 °C |
| 100 °F | 37.78 °C |
How to use this Fahrenheit converter
- 1. Enter the value you want to convert in the first input field. You can type decimals or whole numbers.
- 2. The result updates instantly with our high-precision formulas, rounding to sensible decimal places for practical use.
- 3. Use the swap button to reverse the calculation and move from celsius back to fahrenheit.
Conversion formula explained
To convert fahrenheit to celsius, multiply the input value by the precise conversion factor derived from international measurement standards. The formula looks like this:
°C = (°F × 0.55555556) - 17.77777778
We compute the factor using the SI base unit as the truth source to guarantee accuracy even across chained conversions (e.g., meters → feet → inches).
Expert Q&A
What is the exact formula for fahrenheit to celsius?
Multiply your fahrenheit value by 0.55555556, then subtract 17.77777778 to reach celsius.
Can I convert celsius back to fahrenheit?
Yes. Swap the converter direction or add 17.77777778 from your celsius value, then divide the result by 0.55555556.
How accurate is this converter?
We anchor every conversion to internationally recognized base units. The calculator rounds to sensible decimals for readability, but core math runs at double precision.