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What is a fahrenheit?

The US weather and cooking unit — water freezes at 32 °F

Definition

The Fahrenheit scale places water's freezing point at 32 °F and its boiling point at 212 °F. Proposed by Daniel Gabriel Fahrenheit in 1724, it is still the official temperature unit in the US, Belize and a few Caribbean countries. Normal human body temperature is 98.6 °F.

Common uses

  • US daily weather and climate reports
  • US cooking oven temperatures
  • US medical thermometers

🌍 Real-world scale

US room temperature 68–72 °F. Body temperature 98.6 °F. Fever 100.4 °F. Pizza oven 450 °F.

Convert from degrees Fahrenheit

3 conversions
Fahrenheit to Celsius1 °F = -17.2222 °CFahrenheit to Kelvin1 °F = 255.928 KFahrenheit to Rankine1 °F = 460.67 °R

Convert to degrees Fahrenheit

3 conversions
Celsius to Fahrenheit1 °C = 33.8 °FKelvin to Fahrenheit1 K = -457.87 °FRankine to Fahrenheit1 °R = -458.67 °F

Tips

  • Formula: °F = (°C × 9/5) + 32.
  • Rough conversion: subtract 30 then halve to get °C. 70 °F → 20 °C.
  • US ovens in °F; European ovens in °C. Convert before starting a foreign recipe.

Common mistakes

  • Using °F readings in European contexts without conversion.
  • Forgetting the +32 offset — a 20 °F rise is not 20 °C rise.
  • Assuming 50 °F is half of 100 °F in feel — in °C it is 10 °C vs. 38 °C.

FAQ about the fahrenheit

What is a fahrenheit?
The Fahrenheit scale places water's freezing point at 32 °F and its boiling point at 212 °F. Proposed by Daniel Gabriel Fahrenheit in 1724, it is still the official temperature unit in the US, Belize and a few Caribbean countries. Normal human body temperature is 98.6 °F.
Where is the fahrenheit used?
The fahrenheit is commonly used for: US daily weather and climate reports; US cooking oven temperatures; US medical thermometers.
What is an example of a fahrenheit in real life?
US room temperature 68–72 °F. Body temperature 98.6 °F. Fever 100.4 °F. Pizza oven 450 °F.
What category does the fahrenheit belong to?
The fahrenheit is a unit of temperature, part of the 4-unit temperature category on UnitConv.
How accurate are fahrenheit conversions?
All conversion factors follow NIST and BIPM international standards to 8 significant figures — the highest practical accuracy.
Explore all 4 temperature units and their conversions.🌡️ Temperature hub →