Formula: F = (C × 9/5) + 32
Inverse: C = (F − 32) × 5/9
Absolute zero is −273.15 °C which equals −459.67 °F.
Tip: use Tab to move between fields and press Enter to convert.
1) What is the formula to convert Celsius to Fahrenheit?
The relationship is linear: F = (C × 9/5) + 32. Multiply Celsius by nine fifths then add thirty two.
2) How do I handle negative temperatures?
Negative Celsius values are valid above absolute zero. The calculator accepts them and computes the correct Fahrenheit value automatically.
3) Why do my results differ from a textbook by a small amount?
Differences usually come from rounding choices. Use the decimals selector to match the rounding used by your source.
4) Can I convert several values at once?
Yes. Paste a list separated by spaces commas or newlines into the bulk box. Non numeric items are ignored.
5) What is absolute zero in Celsius and Fahrenheit?
Absolute zero is −273.15 °C which corresponds to −459.67 °F. Values below this are physically impossible.
6) Does this tool support the inverse conversion?
Yes. Use the reverse compare panel to input Fahrenheit and get the equivalent Celsius value instantly.
7) How accurate is this calculator?
It uses the exact linear formula with configurable rounding from 0 to 8 decimal places. The arithmetic is double precision in modern browsers and on the server.