18°F to °C
Instant 18°F to °C conversion — free, accurate, no signup.
Instant Answer
18 °F = -7.78 °C
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18 °F = -7.78 °C
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About 18°F to °C
Swimming pool and spa temperatures are often listed in Fahrenheit in the US. A comfortable pool temperature of 78–82°F converts to 26–28°C — the standard range used internationally. The formula for converting Fahrenheit to Celsius is: °C = (°F − 32) × 5/9. Subtracting 32 accounts for the difference in zero points, and multiplying by 5/9 adjusts the scale size. Fahrenheit (°F) is the temperature scale used in the United States and a few other countries. Celsius (°C) is the standard scale in most of the world and in all scientific contexts.
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Frequently Asked Questions
18°F equals -7.78°C. The formula is: °C = (°F − 32) × 5/9.
Subtract 32 from 18, then multiply by 5/9. So (18 − 32) × 0.5556 = -7.78°C.
18°F (-7.78°C) is below freezing — very cold.
Normal body temperature is 98.6°F (37°C). 18°F equals -7.78°C.
Fahrenheit is used primarily in the United States. Celsius is the standard in most other countries and in all scientific work. Converting is important for travel, cooking, medicine, and weather forecasting.
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