-20.8 degrees Celsius = -5.44°F (exact). Rounded: -5.44°F. In Kelvin: 252.35 K. In Rankine: 454.23°R.
Below freezing (0°C = 32°F). Water is solid ice at this temperature.
Below freezing: -20.8°C = -5.44°F. Key landmarks: 0°C = 32°F (freezing), −10°C = 14°F (cold winter), −20°C = −4°F (severe cold), −40°C = −40°F (where scales meet).
All temperature units: -5.44°F · 252.35 K (Kelvin) · 454.23°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 -20.8°C: (-20.8 × 1.8) + 32 = -37.44 + 32 = -5.44°F. Reverse: °C = (°F − 32) × 5/9 = (-5.44 − 32) × 0.5556 = -20.8°C.
-20.8°C = -5.44°F (exact: -5.44°F). Formula: (-20.8 × 9/5) + 32 = -5.44°F.
Multiply by 1.8 then add 32: -20.8 × 1.8 = -37.44, + 32 = -5.44°F. Quick estimate: double the Celsius value and add 30 → -11.6°F (approximate).
Add 273.15: -20.8 + 273.15 = 252.35 K. Kelvin is used in science — 0 K is absolute zero (the coldest possible temperature).
Below freezing (0°C = 32°F). Water is solid ice at this temperature. In Fahrenheit: -5.44°F is below freezing.