Fahrenheit to Celsius Converter

Convert Fahrenheit to Celsius instantly — essential for weather, cooking, travel, and science.

Conversion table

Temperature	Celsius	Kelvin	Rankine
1	-17.22°C	255.93 K	460.67°R
2	-16.67°C	256.48 K	461.67°R
3	-16.11°C	257.04 K	462.67°R
4	-15.56°C	257.59 K	463.67°R
5	-15°C	258.15 K	464.67°R
10	-12.22°C	260.93 K	469.67°R
15	-9.44°C	263.71 K	474.67°R
20	-6.67°C	266.48 K	479.67°R
25	-3.89°C	269.26 K	484.67°R
30	-1.11°C	272.04 K	489.67°R
40	4.44°C	277.59 K	499.67°R
50	10°C	283.15 K	509.67°R
60	15.56°C	288.71 K	519.67°R
70	21.11°C	294.26 K	529.67°R
75	23.89°C	297.04 K	534.67°R

💡 Temperature Tips

Formula: °C = (°F - 32) × 5/9. Quick: subtract 30, then divide by 2.
Key anchors: 32°F = 0°C, 72°F = 22°C, 98.6°F = 37°C, 212°F = 100°C.
-40 is the same in both scales: -40°F = -40°C.
US oven temps: 350°F = 177°C, 375°F = 191°C, 400°F = 204°C, 425°F = 218°C.

How to Convert Fahrenheit to Celsius

To convert Fahrenheit to Celsius, subtract 32 and multiply by 5/9. The formula is: °C = (°F - 32) × 5/9. The Fahrenheit scale is used daily in the United States for weather, cooking, and thermostats. Most other countries use Celsius. The -32 removes the offset (water freezes at 32°F vs 0°C), and ×5/9 scales the degree size (180°F range = 100°C range between freezing and boiling). Understanding this conversion is essential for international travel, following recipes from other countries, and interpreting global weather reports.

The °F to °C Formula Explained

The exact formula is: °C = (°F - 32) / 1.8. The factor 1.8 (or 9/5) exists because there are 180 Fahrenheit degrees between water's freezing (32°F) and boiling (212°F), compared to 100 Celsius degrees (0°C to 100°C). So 180/100 = 1.8. For quick mental math: subtract 30 and divide by 2. Example: 72°F → (72-30)/2 = 21°C (actual: 22.2°C — close enough for weather). This shortcut works well between 30°F and 100°F.

Common Fahrenheit to Celsius Conversions

0°F = -17.8°C — very cold winter weather
32°F = 0°C — water freezes, snow likely
68°F = 20°C — comfortable room temperature
72°F = 22.2°C — ideal thermostat setting
98.6°F = 37°C — normal human body temperature
212°F = 100°C — water boils at sea level

US Oven Temperature Chart (°F → °C)

250°F = 121°C — very low / warming
325°F = 163°C — low oven / slow roasting
350°F = 177°C — moderate oven (most baking)
375°F = 191°C — moderate-hot (cookies, pies)
400°F = 204°C — hot oven (roasting vegetables)
450°F = 232°C — very hot (pizza, bread)

Fahrenheit to Celsius Examples

Step-by-step conversions

Weather: 85°F to °C

85 - 32 = 53
53 × 5/9 = 53 / 1.8 = 29.4°C
Quick method: (85-30)/2 = 27.5°C (close)
85°F is a hot summer day

85°F = 29.4°C (hot summer day)

Oven: 375°F to °C

375 - 32 = 343
343 × 5/9 = 343 / 1.8 = 190.6°C
Round to 190°C or 191°C
Gas Mark 5 equivalent

375°F = 190.6°C ≈ 190°C

Frequently Asked Questions

What is the formula for Fahrenheit to Celsius?

°C = (°F - 32) × 5/9, or equivalently °C = (°F - 32) / 1.8. Subtract 32 from Fahrenheit, then multiply by 5/9 (or divide by 1.8) to get Celsius.

What is 72°F in Celsius?

72°F = 22.2°C. This is a common room temperature and thermostat setting in the US. In Celsius-using countries, 22°C is considered comfortable indoor temperature.

What is 98.6°F in Celsius?

98.6°F = 37°C exactly. This is the standard normal human body temperature. A fever is generally considered 100.4°F (38°C) or higher.

How do I quickly estimate °F to °C?

Subtract 30 and divide by 2. Example: 80°F → (80-30)/2 = 25°C (actual: 26.7°C). This works within ±2°C for normal weather temperatures (30-100°F). For more accuracy, subtract 32 and divide by 1.8.

What is 350°F in Celsius for baking?

350°F = 176.7°C, typically rounded to 177°C or 180°C. This is the most common baking temperature in US recipes. In metric countries, the equivalent is usually stated as 180°C.

What temperature is the same in °F and °C?

-40 degrees is identical on both scales: -40°F = -40°C. You can verify: (-40 - 32) × 5/9 = -72 × 5/9 = -40. This is extremely cold — roughly the temperature of an arctic winter.