Convert Celsius to Rankine

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 Rankine (symbol: °R) is a unit of temperature. An absolute temperature scale proposed by Scottish engineer William John Macquorn Rankine in 1859, using the Fahrenheit degree interval but anchored at absolute zero (0 °R = -459.67 °F = -273.15 °C = 0 K). Rankine is primarily used in US mechanical engineering for: combustion analysis (adiabatic flame temperatures, gas-turbine cycle inlet/outlet conditions), HVAC psychrometrics (the moist-air enthalpy formulation in ASHRAE Handbook chapter 1 sometimes uses °R for ideal-gas-mixture analysis), rocket propulsion (specific impulse Isp = thrust/mass-flow × g, where chamber temperatures are 5,000-6,500 °R for hydrocarbon-oxidizer systems and 6,000-7,500 °R for hydrogen-oxygen Space Shuttle Main Engine), and steam-cycle calculations per US-edition Cengel-Boles + Moran-Shapiro thermodynamics textbooks. Rankine is the temperature analog of US Customary engineering units the way kelvin is the metric equivalent — every dimensional-analysis problem involving ft-lbf, BTU, lbm, lbf, slug, and °F absolute requires °R to maintain coherence. Standard reference values: triple-point of water 491.69 °R; ICE standard ambient T 536.67 °R (= 25 °C); steam boiling 671.67 °R (= 100 °C). Most US engineering textbooks dual-list Kelvin and Rankine in thermodynamic tables.

It belongs to the imperial measurement system.

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