100 degrees Celsius = 212°F (exact). Rounded: 212°F. In Kelvin: 373.15 K. In Rankine: 671.67°R.
Boiling point of water at sea level (100°C = 212°F exactly).
For context: 0°C = 32°F (freezing), 20°C = 68°F (room temp), 37°C = 98.6°F (body temp), 100°C = 212°F (boiling). The Celsius scale places 0° and 100° at the freezing and boiling points of water at sea level.
All temperature units: 212°F · 373.15 K (Kelvin) · 671.67°R (Rankine). Kelvin starts at absolute zero (−273.15°C). Rankine is used in some US engineering applications.
Formula: °F = (°C × 9/5) + 32. For 100°C: (100 × 1.8) + 32 = 180 + 32 = 212°F. Reverse: °C = (°F − 32) × 5/9 = (212 − 32) × 0.5556 = 100°C.
100°C = 212°F (exact: 212°F). Formula: (100 × 9/5) + 32 = 212°F.
Multiply by 1.8 then add 32: 100 × 1.8 = 180, + 32 = 212°F. Quick estimate: double the Celsius value and add 30 → 230°F (approximate).
Add 273.15: 100 + 273.15 = 373.15 K. Kelvin is used in science — 0 K is absolute zero (the coldest possible temperature).
Boiling point of water at sea level (100°C = 212°F exactly). In Fahrenheit: 212°F is very hot.