Fahrenheit to Fahrenheit Converter

Quick Conversion: Convert via Celsius

Fahrenheit to Fahrenheit Converter

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How to Convert Fahrenheit to Fahrenheit

The formula is:

Convert via Celsius

Temperature conversion chart

To Fahrenheit To Celsius To Kelvin
From Fahrenheit (F) F (F - 32) × 5/9 (F - 32) × 5/9 + 273.15
From Celsius (C or o) (C × 9/5) + 32 C C + 273.15
From Kelvin (K) (K - 273.15) × 9/5 + 32 K - 273.15 K

About the Fahrenheit

Facts & Uses

  • Primary scale in the United States for weather, body temperature, cooking, and HVAC. Devised by Daniel Gabriel Fahrenheit in 1724.
  • Body temperature: 98.6 °F normal (Wunderlich, 1868), 100.4 °F = 38 °C low fever, 104 °F+ = 40 °C high fever.
  • US oven standards: 350 °F baking, 375 °F roasting, 400-425 °F high-heat roasting, 450-500 °F broiling/pizza.
  • Weather references: 32 °F = freezing, 70 °F = comfortable room temp, 90 °F+ = hot summer day, 0 °F = bitter cold (≈ −18 °C).

Curiosities

  • Fahrenheit's original scale used three reference points: 0 °F = freezing brine (saltwater + ammonium chloride), 32 °F = pure water freezing, 96 °F = average human body temp (later refined to 98.6 °F).
  • The 180-degree gap between freezing (32) and boiling (212) of water is no accident — Fahrenheit chose it because 180 has many divisors, useful for scale subdivision.
  • Ray Bradbury's novel Fahrenheit 451 takes its title from the temperature at which book paper supposedly auto-ignites — though the actual flash point of paper is closer to 450-475 °F depending on type.
  • Approximate equivalents: 32 °F = 0 °C; 100 °F ≈ 37.8 °C (warm fever); 212 °F = 100 °C (boiling); −40 °F = −40 °C.

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All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.

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Conversion factors verified against NIST, BIPM, ITS-90 (International Temperature Scale) Defined by the absolute thermodynamic scale (Kelvin). Last reviewed: March 2026
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