Direct answer
Converting a body-temperature reading
Multiply the Celsius reading by 1.8 and add 32. For example, 37°C × 1.8 + 32 equals 98.6°F.
The same formula converts whole and decimal thermometer readings. Decimal precision is useful because a small Celsius difference produces a noticeable Fahrenheit difference.
Conversion gives the equivalent number on another scale. It does not determine what the reading means medically.
Enter a decimal body-temperature reading to calculate Fahrenheit.
Temperature interpretation depends on age, symptoms, measurement site, thermometer type, medical history, and professional guidance. Seek appropriate medical advice for concerning readings or symptoms.
Thermometer conversion
Body-temperature conversion formula
Equivalent fraction form: °F = (°C × 9/5) + 32.
For a reading of 36.7°C:
Rounded to one decimal place: approximately 98.1°F.
Keep the original decimal Celsius value until the calculation is complete.
Manual method
How to convert body temperature step by step
Use 38.2°C as an example.
- 01
Record the exact displayed reading
Write 38.2°C rather than rounding it to 38°C.
- 02
Multiply by 1.8
Calculate 38.2 × 1.8 to get 68.76.
- 03
Add 32
Add 32 to 68.76 to get 100.76°F.
- 04
Round only at the end
To one decimal place, the result is approximately 100.8°F.
Worked thermometer readings
Body-temperature conversion examples
Convert 35°C
Convert 36°C
Convert 37°C
Convert 38°C
Convert 39°C
Convert 40°C
Decimal reference values
Body-temperature Celsius-to-Fahrenheit chart
| Celsius | Fahrenheit |
|---|---|
| 35.0°C | 95.0°F |
| 35.5°C | 95.9°F |
| 36.0°C | 96.8°F |
| 36.1°C | 97.0°F |
| 36.2°C | 97.2°F |
| 36.3°C | 97.3°F |
| 36.4°C | 97.5°F |
| 36.5°C | 97.7°F |
| 36.6°C | 97.9°F |
| 36.7°C | 98.1°F |
| 36.8°C | 98.2°F |
| 36.9°C | 98.4°F |
| 37.0°C | 98.6°F |
| 37.5°C | 99.5°F |
| 38.0°C | 100.4°F |
| 38.5°C | 101.3°F |
| 39.0°C | 102.2°F |
| 39.5°C | 103.1°F |
| 40.0°C | 104.0°F |
Fahrenheit values in the table are rounded to one decimal place where necessary.
Thermometer readings
Why measurement method matters
Body-temperature readings can differ depending on the measurement site, device, technique, timing, and environmental conditions.
- Follow the thermometer manufacturer's instructions.
- Confirm whether the device displays Celsius or Fahrenheit.
- Record the measurement site when relevant.
- Keep the original displayed value before converting it.
- Avoid comparing readings taken by different methods as though they were identical.
- Clean and maintain the device as instructed.
A conversion formula cannot correct an inaccurate thermometer reading or inconsistent measurement method.
Decimal accuracy
How much precision should be kept?
A thermometer displaying tenths of a degree Celsius may be converted to tenths of a degree Fahrenheit for a readable result.
Measured to 0.1°C
Calculation result
Rounded to 0.1°F
Displaying many extra digits does not make the original thermometer reading more accurate.
Using the converted number
Conversion and medical interpretation are different
The equation tells you which Fahrenheit number represents the same temperature as a Celsius reading. It does not diagnose a condition or determine the appropriate response.
Interpretation can depend on age, symptoms, pregnancy, health conditions, medications, measurement site, duration, and guidance from a qualified healthcare professional.
Contact a qualified healthcare professional or local medical service for concerning symptoms, unusual readings, or questions about an infant, older adult, pregnancy, or a person with significant health conditions.
Accuracy check
Common body-temperature conversion mistakes
Rounding Celsius before converting
Changing 36.7°C to 37°C changes the result from about 98.1°F to 98.6°F.
Using a weather shortcut
The double-and-add-30 shortcut is too approximate for a body-temperature reading.
Confusing the thermometer unit
Confirm whether the display is already in Celsius or Fahrenheit before converting.
Assuming conversion interprets the reading
Numerical conversion and medical evaluation are separate tasks.
Continue reading
Related Celsius-to-Fahrenheit guides
Questions and answers
Frequently asked questions
How do I convert body temperature from Celsius to Fahrenheit?
Multiply the Celsius reading by 1.8 and add 32.
What is 37 degrees Celsius in Fahrenheit?
Thirty-seven degrees Celsius equals 98.6 degrees Fahrenheit.
What is 38 degrees Celsius in Fahrenheit?
Thirty-eight degrees Celsius equals 100.4 degrees Fahrenheit.
Should body temperature be rounded before conversion?
No. Keep the original decimal reading and round only the final Fahrenheit result.
Convert a temperature
Use the Celsius to Fahrenheit Converter
Enter any positive, negative, whole, or decimal Celsius temperature to calculate Fahrenheit instantly.
Open Celsius to Fahrenheit ConverterLast updated: July 27, 2026