Fahrenheit to Celsius Converter

The Fahrenheit to Celsius Converter is a powerful calculator that allows users to convert temperatures from the Fahrenheit (°F) scale to the Celsius (°C) scale quickly and accurately. This conversion is crucial for scientific research and communication, where different regions use different temperature scales.

Definition of Fahrenheit (°F)

The Fahrenheit temperature scale is commonly used in the United States. The symbol for degrees Fahrenheit is °F. On the Fahrenheit scale, the freezing point of water is 32°F, the boiling point of water is 212°F under standard atmospheric conditions, and Absolute zero (lowest possible temperature) is −459.67°F.

Brief Definition of Celsius (°C)

The Celsius or centigrade is a temperature measurement scale. The symbol for degree Celsius is °C, and the Celsius scale is part of the metric system. On the Celsius scale, the boiling point of water is 100 °C, the freezing point of water is 0 °C under standard atmospheric conditions, and absolute zero is −273.15 °C.

°F to °C Conversion Formula

The formula for converting a temperature from Fahrenheit (°F) to Celsius (°C) is:

Celsius (°C) = (Fahrenheit (°F) – 32) ÷ (9/5)

The size of a degree on the Fahrenheit scale is smaller than on the Celsius scale. Precisely, a change of 1°C corresponds to a change of 1.8°F. Dividing by 1.8 (or 9/5) scales the adjusted Fahrenheit value to match the Celsius scale.

Subtract 32: The Fahrenheit scale starts at 32°F for the freezing point of water, whereas the Celsius scale starts at 0°C. Subtracting 32 from the °C adjusts the Fahrenheit temperature to match where Celsius starts.

Divide by 9/5 (or 1.8): Fahrenheit has a different scale than Celsius. Every 1-degree change in Celsius is equivalent to a 1.8-degree change in the Fahrenheit scale. Dividing by 1.8 makes the temperature match the Celsius scale.

= (95 – 32) ÷ (9/5)
= 63 ÷ 1.8
 = 35

= (77 – 32) ÷ (9/5)
= 45 ÷ 1.8
= 25

How to use this calculator

Step 1: Find the input field for Fahrenheit (°F) and enter the temperature you want to convert. Always make sure you enter a valid number.

Step 2: Once you have entered the Fahrenheit temperature value, click the calculate button to start the calculation. The calculator will automatically apply the formula to convert the temperature to Celsius.

Phenomenon Degrees Fahrenheit (°F) Degrees Celsius (°C) Kelvin (K)
Absolute Zero Temp-459.67-273.150
Freezing Water Temp320273.15
Boiling Water Temp212100373.15
Human Body Temp98.637310.15
Average Room Temp71.622295.15
Oven Baking Temp350176.67449.82
Molten Lava Temp20001093.331366.48
Surface Sun Temp994155005773.15
Liquid Nitrogen Temp-320.4-195.877.35
Liquid Helium Temp-452.1-268.94.2
Core Earth Temp1083260006273.15
Lightning Bolt Temp537002972630000.15

Table 1 shows temperature readings in Celsius, Fahrenheit, and Kelvin at different reference points.

1. What is the formula of °F to °C?

The formula to convert Fahrenheit (°F) to Celsius (°C) is: °C = (°F – 32) ÷ (9/5)

100°F is approximately 37.78°C, not 40°C.

99.5 Fahrenheit is 37.5 Celsius.