Health Converters tool
Body Temperature Converter
Convert a body temperature from Celsius to Fahrenheit or Fahrenheit to Celsius, for thermometer readings from 25 to 45 °C. Free, nothing stored.
Nothing you enter leaves your device.
Inputs
Results
Enter values to see your results.
Simple steps
How it works
- 01
Choose °C to °F or °F to °C.
- 02
Enter the temperature from your thermometer.
- 03
Select Convert to see it in the other unit.
Good to know
Frequently asked questions
How do I convert °C to °F?
Multiply by 9, divide by 5 and add 32. So 37 °C is 98.6 °F.
What is a normal body temperature?
Usually about 36.1 to 37.2 °C (97 to 99 °F). It varies through the day and between people.
When is it a fever?
A temperature of 38 °C (100.4 °F) or more is generally considered a fever. Ask a doctor for advice, especially for babies.
Why does the reading depend on where I measure?
Mouth, ear, forehead and armpit readings differ a little. Use the same method each time.
Why is the range limited?
The converter accepts body temperatures from 25 to 45 °C (77 to 113 °F).
Is anything I enter stored or sent?
No. The calculation runs in your browser. Nothing you type is saved or sent to a server.
How it is calculated
°F = °C × 9 ÷ 5 + 32; °C = (°F − 32) × 5 ÷ 9 (SI Brochure). Normal body temperature varies; a review found an average of about 36.6 °C (Geneva and colleagues, 2019).
Sources
- International Bureau of Weights and Measures. The International System of Units (SI Brochure), 9th edition, 2019
- Geneva II et al. Normal body temperature: a systematic review. Open Forum Infect Dis 2019;6:ofz032
Last reviewed: October 14, 2026