AskCalc
Home › General & Anthropometrics › °C ↔ °F

Temperature Conversion (°C ↔ °F)

Converts body temperature between Celsius and Fahrenheit: °C = (°F − 32) × 5/9 and °F = °C × 9/5 + 32. Normal is about 37 °C (98.6 °F); fever is ≥38 °C (100.4 °F).

  • Temperature (°C or °F)
—

Formula

°C = (°F − 32) × 5/9 · °F = °C × 9/5 + 32

Clinical pearls

  • A number without units between 50 and 122 is treated as °F (it would be implausible in °C).
  • Rectal readings run ~0.5 °C higher than oral; axillary ~0.5 °C lower.

Examples

convert 101.3 F to celsiuswhat is 39 C in fahrenheittemperature 98.6 f

FAQ

What is 100.4 °F in Celsius?

38.0 °C, the usual threshold for fever.

What is normal body temperature?

About 37 °C (98.6 °F) orally, with a normal range of roughly 36.1–37.2 °C.

Evidence

  1. MedCalc-Bench reference implementation (convert_temperature.py).
  2. Mackowiak PA et al. A critical appraisal of 98.6°F, the upper limit of the normal body temperature. JAMA 1992;268:1578–80.

General & Anthropometrics · Reviewed 2026-10-14 · Methodology