Kelvin to Fahrenheit Converter

To convert Kelvin to Fahrenheit, use °F = (K − 273.15) × 9/5 + 32.

The Kelvin (K) is the SI base unit of thermodynamic temperature, starting at absolute zero (0 K = −273.15°C), used in science and engineering.

The Fahrenheit (°F) is the temperature scale used in the United States, where 32°F is the freezing point and 212°F is the boiling point of water.

Common baking temperatures: cookies and cakes 170–180°C (340–355°F), bread 190–220°C (375–430°F), pizza 220–250°C (430–480°F), roasting meat 160–200°C (320–390°F). Fan-assisted ovens typically run 10–20°C hotter than conventional settings.

Normal body temperature is 36.1–37.2°C (97–99°F). A fever is generally defined as above 38°C (100.4°F). A high fever is above 39.5°C (103°F). Temperature varies slightly by time of day and measurement method (oral, axillary, rectal).

Weather temperature reference points: below 10°C (50°F) feels cold, 15–20°C (59–68°F) is cool and comfortable, 25–30°C (77–86°F) is warm, above 35°C (95°F) is hot, and above 40°C (104°F) is very hot and potentially dangerous without shade and hydration.

A refrigerator should be kept at 1–4°C (34–39°F) to slow bacterial growth without freezing food. A freezer should be at −18°C (0°F) or colder. Food stays safe indefinitely in a properly maintained freezer, though quality degrades over time.

The coldest temperature recorded was −89.2°C (−128.6°F) at Vostok Station, Antarctica, in 1983. The hottest was 56.7°C (134.1°F) at Furnace Creek, Death Valley, California, in 1913. The average global surface temperature is about 15°C (59°F).