38°C to °F — What is 38 Celsius in Fahrenheit?
38°C = 100.40°F. Use the exact formula (°C × 9/5) + 32 to convert any Celsius temperature to Fahrenheit — algebraically exact with zero rounding, as defined by the NIST.
Answer
38 °C = 100.40 °F
Exact: 100.400000 °F · uses the BIPM-defined constant
How it's calculated
(°C × 9/5) + 32 = °F
Step 1: Apply the formula to the input value.
Step 2: (38 × 9/5) + 32 = 68.4 + 32 = 100.40
What does 38°C feel like?
38°C (100.4°F) is the WHO's clinical fever threshold for adults. Antipyretics (paracetamol, ibuprofen) are typically recommended above 38.5°C. Fever in infants under 3 months above 38°C is a medical emergency requiring immediate attention.
38°C in other temperature scales
Celsius
38°C
Fahrenheit
100.40°F
Kelvin
311.15 K
Common temperature references
Key temperatures from science, cooking, and medicine
| °C | °F | Reference |
|---|---|---|
| -40°C | -40°F | °C and °F are equal |
| -18°C | 0°F | Zero Fahrenheit |
| 0°C | 32°F | Water freezes |
| 10°C | 50°F | Cool day |
| 20°C | 68°F | Room temperature |
| 25°C | 77°F | Warm room |
| 37°C | 98.6°F | Body temperature |
| 38°C | 100.4°F | Fever threshold (WHO) |
| 100°C | 212°F | Water boils (sea level) |
| 160°C | 320°F | Low oven |
| 180°C | 356°F | Moderate oven (Gas Mark 4) |
| 200°C | 392°F | Hot oven (Gas Mark 6) |
| 220°C | 428°F | Very hot oven (Gas Mark 7) |
| 250°C | 482°F | Max home oven |
Celsius to Fahrenheit — Nearby Values
Click any row to open its full conversion page
Common questions about 38 °C to °F
What is 38°C in Fahrenheit?
38 degrees Celsius equals exactly 100.4 degrees Fahrenheit. The formula is (38 × 9/5) + 32 = 100.4°F. In Kelvin, this is 311.15 K.
How do you convert 38°C to °F step by step?
Step 1: Multiply 38 by 9/5 (or 1.8) to get 68.4. Step 2: Add 32. Result: 68.4 + 32 = 100.4°F. This formula is algebraically exact — zero rounding at any step.
Is 38°C hot or cold?
38°C is very hot. Extreme heat warning territory in most countries.
What is 100.4°F back in Celsius?
100.4°F converts back to exactly 38°C — which is 38°C. The conversion is perfectly reversible using the inverse formula: (°F − 32) × 5/9.
Is 38°C a fever?
The WHO defines fever as body temperature above 38°C (100.4°F). 38°C is a low-grade fever — consider paracetamol or ibuprofen above 38.5°C.
What should I wear at 38°C?
At 38°C, extreme heat clothing: lightest possible fabrics, wide-brim hat, frequent water breaks. Avoid outdoor exertion during midday. Seek air-conditioned spaces.
Related Celsius to Fahrenheit Conversions
Live calculator
Type any value — converts instantly
Fahrenheit
38 °C=100.40 °F
Formula used
(°C × 9/5) + 32 = °F
Algebraically exact — zero rounding in the formula