To convert Fahrenheit ($F$) to Celsius ($C$), we use the formula:

$C = \frac{5}{9} (F - 32)$

Substitute $F = 23$:

$C = \frac{5}{9} (23 - 32)$

$C = \frac{5}{9} (-9) = -5$

So, 23°F = -5°C.

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Would you like further details or have additional questions?

Related Questions:

1. What is the formula to convert Celsius to Fahrenheit?
2. How do you convert 50°F to Celsius?
3. What is the Kelvin equivalent of 23°F?
4. Why does the Fahrenheit and Celsius scale have different starting points?
5. How do you convert negative Fahrenheit temperatures to Celsius?

Tip: To quickly estimate, subtract 30 from the Fahrenheit value and divide by 2 (approximation).