Fahrenheit to Celsius

32°F equals exactly 0°C — the freezing point of pure water at standard atmospheric pressure. The Fahrenheit scale anchors at 32 for freezing; Celsius uses 0. Formula: °C = (32 − 32) × 5/9 = 0°C. Below 32°F, roads and pipes freeze, which is why US weather forecasts use this threshold.

98.6°F equals exactly 37.0°C — the traditional average human body temperature. Formula: (98.6 − 32) × 5/9 = 37.0°C. Fever is typically defined as above 100.4°F (38.0°C). More recent research places the true average closer to 36.6°C (97.9°F), but 37°C remains the clinical standard worldwide.

72°F equals 22.2°C. This is the standard comfortable room temperature in the United States — most thermostats are set between 68°F and 72°F (20°C–22.2°C). European indoor comfort standards typically recommend 20°C–22°C (68°F–71.6°F), so 72°F sits just above the upper European comfort range.

212°F equals exactly 100°C — the boiling point of pure water at sea level (1 atm pressure). This is the upper reference point of both scales. At higher altitudes water boils at lower temperatures: at 3,000 m (the height of many Andean cities), water boils at about 90°C (194°F), which affects cooking times.

0°F equals −17.78°C. Formula: (0 − 32) × 5/9 = −17.78°C. This is a severe cold temperature common in the US Midwest and northern states in winter. At −18°C, frostbite can occur on exposed skin within 30 minutes; US weather services issue extreme-cold warnings at or below 0°F.

350°F equals 176.7°C (often rounded to 175°C or 180°C in European recipes). Formula: (350 − 32) × 5/9 = 176.67°C. This is the most common baking temperature in US and UK recipes — used for cookies, cakes, brownies, and biscuits. European ovens: 175–180°C; gas ovens: Gas Mark 4.

400°F equals 204.4°C (often written as 200°C in European recipes). Formula: (400 − 32) × 5/9 = 204.44°C. This is a high roasting temperature used for pizza, bread, roast vegetables, and poultry. European recipes specify 200°C; gas ovens: Gas Mark 6.

The Fahrenheit and Celsius scales are equal at exactly −40°. Both −40°F and −40°C represent the same temperature — the only point where the two scales cross. Formula: set °C = (°C − 32) × 5/9 and solve to get °C = −40. This extreme cold occurs naturally in parts of Siberia, northern Canada, and Antarctica.