21°F to Celsius

21°F is -6.1°C (267.04 K). 21°F equals about -6.1°C. This temperature is below the freezing point of water (0°C / 32°F). Expect ice, frost, and slippery surfaces outdoors.

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

-6.1°C

Celsius

-6.1 °C

Fahrenheit

21.0 °F

Kelvin

267.0 K

Formula · worked example

°C = (21 − 32) × 5/9 = -6.1

Worked example

°C = (21 − 32) × 5/9 = -6.1

Context: below freezing. Reverse lookup: -6.1°C to Fahrenheit.

Nearby Fahrenheit values

Quick hops around 21°F

Fahrenheit	Celsius
16°F	-8.9°C
17°F	-8.3°C
18°F	-7.8°C
19°F	-7.2°C
20°F	-6.7°C
21°F	-6.1°C
22°F	-5.6°C
23°F	-5.0°C
24°F	-4.4°C
25°F	-3.9°C
26°F	-3.3°C

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