Convert Fahrenheit to Celsius

The Fahrenheit (symbol: °F) is a unit of temperature. A temperature scale introduced by Polish-German physicist Daniel Gabriel Fahrenheit in 1724 — on which water freezes at exactly 32 °F and boils at exactly 212 °F under standard atmospheric pressure (101.325 kPa). The 180-degree span between freezing and boiling is divided into smaller intervals than Celsius (1 °C = 9/5 °F), giving finer resolution in everyday weather conversation. Fahrenheit remains the dominant temperature scale in the United States, Belize, and the Cayman Islands for: weather reporting (NOAA / NWS US forecasts in °F; typical US summer high 85-100 °F; winter low 10-32 °F across temperate latitudes); cooking and oven temperatures per US-edition cookbooks + USDA FSIS food-safety thresholds (safe meat cooking 145 °F poultry breast, 165 °F poultry whole, 145 °F pork, 145 °F beef medium-rare); HVAC thermostat settings (typical 68-72 °F heating, 72-78 °F cooling per ASHRAE 55 occupant-comfort thermal envelope); pool and spa water (typical 78-82 °F pool, 100-104 °F spa); refrigerator/freezer per US FDA (refrigerator ≤40 °F, freezer ≤0 °F). The Fahrenheit scale's smaller degree interval is sometimes argued to be a feature for human-comfort discussion ('72 °F vs 73 °F is a noticeable difference').

It belongs to the imperial measurement system.

Fahrenheit are commonly used in weather forecasting, cooking, scientific experiments, and HVAC.

The Celsius (symbol: °C) is a unit of temperature. A temperature scale on which water freezes at exactly 0 °C and boils at exactly 100 °C under standard atmospheric pressure (101.325 kPa) — devised by Swedish astronomer Anders Celsius in 1742 (originally inverted, with 0 at boiling and 100 at freezing — flipped to the modern convention by Carl Linnaeus in 1745). Celsius is the global standard for: weather forecasts and climate-change reporting (IPCC AR6 baseline 1.5 °C / 2 °C / 4 °C warming scenarios), cooking and food-safety temperatures per FDA Food Code + EU EFSA guidelines (safe cold storage <4 °C; safe meat cooking ≥74 °C internal), human body temperature (normal core 36.5-37.5 °C per WHO; fever clinical threshold ≥38 °C), HVAC thermostat settings outside US, refrigerant and process temperatures in chemical engineering per IUPAC SATP (Standard Ambient Temperature & Pressure = 25 °C, 100 kPa), and most scientific measurement worldwide outside the US. Because the Celsius degree interval is identical to the kelvin (Δ1 °C = Δ1 K), Celsius and kelvin convert via simple +/- 273.15 offset, making it the everyday face of SI temperature: scientists and laypeople alike use it without conversion penalty.

It belongs to the metric measurement system.

Celsius are commonly used in weather forecasting, cooking, scientific experiments, and HVAC.