Convert Celsius to Fahrenheit

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.

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.