-21°F to Celsius

-21°F is -29.4°C (243.71 K). -21°F equals about -29.4°C. This temperature is severe winter cold. Frostbite risk rises quickly outdoors; many cars and batteries struggle at this temperature.

Fahrenheit to Celsius

Instant two-way conversion with Kelvin and a live scale.

Fahrenheit°F

°F

Type to convert · Enter copies · Ctrl/⌘S swaps

Celsius°C

-29.4°C

Celsius

-29.4 °C

Fahrenheit

-21.0 °F

Kelvin

243.7 K

Formula · worked example

°C = (-21 − 32) × 5/9 = -29.4

Worked example

°C = (-21 − 32) × 5/9 = -29.4

Context: severe winter cold. Reverse lookup: -29.4°C to Fahrenheit.

Nearby Fahrenheit values

Quick hops around -21°F

Fahrenheit	Celsius
-26°F	-32.2°C
-25°F	-31.7°C
-24°F	-31.1°C
-23°F	-30.6°C
-22°F	-30.0°C
-21°F	-29.4°C
-20°F	-28.9°C
-19°F	-28.3°C
-18°F	-27.8°C
-17°F	-27.2°C
-16°F	-26.7°C

More tools: Fahrenheit to Celsius · Celsius to Fahrenheit · Body temperature