Fahrenheit to Celsius Converter
Unit Converter
Instant · Precise · Universal
6 units available
6 categories total
How to Convert Fahrenheit to Celsius
To Celsius: °C = (°F − 32) × 5/9. To Kelvin: K = (°F − 32) × 5/9 + 273.15. To Rankine: °R = °F + 459.67.
The Fahrenheit scale has 180 degrees between freezing (32 °F) and boiling (212 °F), compared to 100 degrees in Celsius.
For example, 1 Fahrenheit (°F) = -17.22222222 Celsius (°C).
Fahrenheit to Celsius — Common Values
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 0.1 | -17.72222222 |
| 0.5 | -17.5 |
| 1 | -17.22222222 |
| 2 | -16.66666667 |
| 5 | -15 |
| 10 | -12.22222222 |
| 25 | -3.888888889 |
| 50 | 10 |
| 100 | 37.77777778 |
| 500 | 260 |
| 1000 | 537.7777778 |
About Fahrenheit (°F)
Definition
The degree Fahrenheit is a temperature unit where water freezes at 32 °F and boils at 212 °F at standard atmospheric pressure, with 180 equal divisions between these points.
Mathematical Relationship
The Fahrenheit scale has 180 degrees between freezing (32 °F) and boiling (212 °F), compared to 100 degrees in Celsius.
Conversion Formula
To Celsius: °C = (°F − 32) × 5/9. To Kelvin: K = (°F − 32) × 5/9 + 273.15. To Rankine: °R = °F + 459.67.
Practical Applications
US weather forecasts, oven temperatures in American cooking, pool and hot tub settings, and thermostat controls in American homes.
Interesting Facts
Fahrenheit originally set human body temperature as 96 °F (a number divisible by 12). The modern accepted value is 98.6 °F (37 °C).
Common Mistakes
Forgetting to subtract 32 before multiplying by 5/9 when converting to Celsius. Also confusing °F with °C in international recipes.
Educational Tips
Quick anchors: 32 °F = freezing, 72 °F = comfortable room, 98.6 °F = body, 212 °F = boiling. For quick °F→°C: subtract 30, divide by 2.
About Celsius (°C)
Definition
The degree Celsius is a unit of temperature on the Celsius scale, where 0 °C is the freezing point and 100 °C is the boiling point of water at standard atmospheric pressure.
Mathematical Relationship
°C = K − 273.15. The Celsius and Kelvin scales have identical degree sizes — they differ only by an offset of 273.15.
Conversion Formula
To Fahrenheit: °F = °C × 9/5 + 32. To Kelvin: K = °C + 273.15. To Rankine: °R = (°C + 273.15) × 9/5.
Practical Applications
Weather reports, cooking temperatures, body temperature (37 °C normal), refrigerator settings (2–4 °C), and industrial processes.
Interesting Facts
−40 °C = −40 °F — the only point where Celsius and Fahrenheit scales intersect. The hottest recorded temperature on Earth was 56.7 °C in Death Valley.
Common Mistakes
Forgetting the °C × 9/5 + 32 offset when converting to Fahrenheit. Also, assuming 0 °C = 0 K (actually 0 °C = 273.15 K).
Educational Tips
Key anchors: 0 °C = water freezes, 37 °C = body temp, 100 °C = water boils. For quick °C→°F: double and add 30 (approximate).