Conversione
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, and Rankine instantly — with all results shown at once.
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Formula: BIPM / NISTLast verified July 2026
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Quick reference — Celsius conversions
| °C | °F | K | °R |
|---|---|---|---|
| 1 | 33.8 | 274.15 | 493.47 |
| 5 | 41 | 278.15 | 500.67 |
| 10 | 50 | 283.15 | 509.67 |
| 25 | 77 | 298.15 | 536.67 |
| 50 | 122 | 323.15 | 581.67 |
| 100 | 212 | 373.15 | 671.67 |
Esempi pratici
Body temperature: 37°C in Fahrenheit
Normal human body temperature is 37°C = 98.6°F. A fever is typically defined as above 38°C (100.4°F). Emergency departments in both systems use these benchmarks.
Oven temperature: 180°C for baking
180°C = 356°F. Most baking recipes in Fahrenheit round this to 350°F (177°C) — a very close approximation. At 400°F the actual temperature is 204°C, not 200°C.
Absolute zero: the coldest possible temperature
Absolute zero = 0 K = −273.15°C = −459.67°F. It is the theoretical point at which all molecular motion stops. It cannot be physically reached, only approached.
Domande frequenti
~4 min readWhat is the formula to convert Celsius to Fahrenheit?▾
°F = (°C × 9/5) + 32. For a quick mental estimate: double the Celsius value and add 30. This gives a rough answer within a few degrees (e.g., 20°C → 68°F exact; estimate → 70°F).
At what temperature are Celsius and Fahrenheit equal?▾
At −40°. Both scales intersect at exactly −40°C = −40°F. This is the only temperature where the two scales agree.
What is Kelvin and why is it used in science?▾
Kelvin is the SI base unit for temperature. It uses the same step size as Celsius but starts at absolute zero (0 K = −273.15°C). Scientists use Kelvin because thermodynamic equations require a scale that starts at true zero — negative Kelvin values would make many formulas undefined.
What is Rankine?▾
Rankine (°R) is the Fahrenheit equivalent of Kelvin — it starts at absolute zero but uses Fahrenheit-sized degrees. 0 K = 0 °R. Rankine is used in some US engineering contexts, particularly thermodynamic calculations in aerospace and heat transfer.
Is 30°C hot weather?▾
30°C = 86°F, which is considered warm to hot in most climates. The UAE and Gulf states regularly see summer temperatures above 40°C (104°F). The WHO defines extreme heat as temperatures above the 90th percentile for a region.
What is the difference between temperature and heat?▾
Temperature measures the average kinetic energy of particles in a substance. Heat is the transfer of energy from a hotter object to a cooler one. A large pot of water at 80°C contains more heat than a small spark at 3000°C — even though the spark has higher temperature.