98.6 Fahrenheit to Celsius (98.6 °F to °C)

Formula and worked answer

°C = (°F − 32) × 5/9

Substituting 98.6 for °F: 98.6 × 0.555556 + -17.777778 = 37 °C. The factor 0.555556 comes from the exact international definition of the degree Fahrenheit relative to the degree Celsius, so this answer is precise rather than rounded.

What does 98.6 Fahrenheit represent?

98.6 degrees Fahrenheit (37 °C) is the canonical "normal" human body temperature published in 19th-century US medical literature, derived from Carl Reinhold August Wunderlich's 1868 study of more than 25,000 patients in Leipzig. Converted to metric it is exactly 37 °C, which is the figure used in non-US clinical thermometry. Modern research has shown average healthy body temperature actually sits a few tenths of a degree below 98.6 °F, but the figure remains the reference point printed on US thermometers and the threshold US clinicians use when describing a "low-grade fever." A patient whose temperature reads 98.6 °F on a US device reads 37 °C on a metric one with no margin of error.

Values near 98.6 °F

• 93.6 °F=34.2223 °C
• 94.6 °F=34.7778 °C
• 95.6 °F=35.3334 °C
• 96.6 °F=35.8889 °C
• 97.6 °F=36.4445 °C
• 99.6 °F=37.5556 °C
• 100.6 °F=38.1112 °C
• 101.6 °F=38.6667 °C
• 102.6 °F=39.2223 °C
• 103.6 °F=39.7778 °C

°F to °C reference table around 98.6

Convert a different value

Looking for a different number of Fahrenheit? Use the full °F to °C converter to enter any value, see the worked formula, and read the full background on the degree Fahrenheit and the degree Celsius. To go the other direction, the °C to °F converter applies the inverse factor and is the page to bookmark if you usually start in Celsius.