Celsius (°C) to Fahrenheit (°F) Conversion
Celsius
The Celsius scale sets 0 °C at the freezing point of water and 100 °C at its boiling point at standard atmospheric pressure. Proposed by Anders Celsius in 1742, it became the international standard for scientific and everyday temperature measurement in all countries that have adopted SI. The Celsius degree is identical in magnitude to the Kelvin, so temperature differences in Celsius and Kelvin are numerically equivalent, though their zeros differ by exactly 273.15.
Fahrenheit
The Fahrenheit scale was developed by Daniel Gabriel Fahrenheit in 1724 and sets the freezing point of water at 32 °F and the boiling point at 212 °F, creating a 180-degree interval exactly 9/5 of the Celsius interval. Today the Fahrenheit scale is the official temperature scale of the United States and several Caribbean nations.
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| -10 °C | 14.00 °F |
| 0 °C | 32.00 °F |
| 10 °C | 50.00 °F |
| 20 °C | 68.00 °F |
| 25 °C | 77.00 °F |
| 30 °C | 86.00 °F |
| 37 °C | 98.60 °F |
| 40 °C | 104.00 °F |
| 50 °C | 122.00 °F |
| 60 °C | 140.00 °F |
| 100 °C | 212.00 °F |
Frequently Asked Questions (FAQ)
What is the exact formula to convert Celsius to Fahrenheit?
The exact formula is °F = (°C × 9/5) + 32, equivalently written as °F = (°C × 1.8) + 32. The two anchor points to memorise: water freezes at 0°C = 32°F, and boils at 100°C = 212°F. A travel shortcut: double the Celsius figure and add 30 for a quick estimate — 20°C ≈ 70°F (exact: 68°F). For body temperature: normal is 37°C = 98.6°F, which is why US doctors use 98.6 as their baseline.
What is 37 degrees Celsius in Fahrenheit?
37°C equals 98.6°F. Using the formula: (37 × 9/5) + 32 = 66.6 + 32 = 98.6°F. This is normal human body temperature.
What are the most important Celsius temperatures to know in Fahrenheit?
Key reference points: −40°C = −40°F (the only crossover), 0°C = 32°F (freezing), 20°C = 68°F (comfortable room temperature), 37°C = 98.6°F (normal body temperature), 100°C = 212°F (boiling). For cooking: 180°C = 356°F (moderate oven), 200°C = 392°F (hot oven). Memorising these anchors lets you estimate any Celsius-to-Fahrenheit conversion without a calculator.
At what temperature are Celsius and Fahrenheit exactly equal?
Celsius and Fahrenheit are equal at exactly −40 degrees. −40°C = −40°F. This is the only crossover point, and it exists because the two scales have different zero points and different degree sizes — one Celsius degree equals 1.8 Fahrenheit degrees. The −40 crossover is memorable in meteorology and engineering: at that temperature you never need to specify the unit. It is also the coldest temperature reliably recorded in inhabited continental regions.
Convert Celsius (°C) to other units of Temperature
| ‣ Celsius (°C) to Celsius (°C) |
| ‣ Celsius (°C) to Fahrenheit (°F) |
| ‣ Celsius (°C) to Kelvin (K) |
| ‣ Celsius (°C) to Rankine (°R) |
| ‣ Celsius (°C) to Celsius (°C) |
| ‣ Fahrenheit (°F) to Celsius (°C) |
| ‣ Kelvin (K) to Celsius (°C) |
| ‣ Rankine (°R) to Celsius (°C) |