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Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Formula: °F = (°C × 9/5) + 32. Example: 100°C = (100 × 9/5) + 32 = 180 + 32 = 212°F. For a quick mental estimate: double the Celsius, subtract 10%, add 32.
How do I convert Fahrenheit to Celsius?
Formula: °C = (°F − 32) × 5/9. Example: 98.6°F = (98.6 − 32) × 5/9 = 66.6 × 0.556 = 37°C (normal body temperature).
What is Kelvin and when is it used?
Kelvin is the SI base unit for temperature, used in science and engineering. 0K is absolute zero — the coldest possible temperature. Kelvin = Celsius + 273.15. There are no negative Kelvin values.
What is normal body temperature?
37°C = 98.6°F = 310.15K. A temperature above 38°C (100.4°F) is generally considered a fever. Normal body temperature can vary between 36.1°C and 37.2°C depending on the person and time of day.
What temperature does water boil and freeze?
At sea level (1 atm pressure): water freezes at 0°C (32°F, 273.15K) and boils at 100°C (212°F, 373.15K). At higher altitudes, boiling point decreases because atmospheric pressure is lower.