Converter
Temperature

Temperature Converters

Convert between Celsius, Fahrenheit, and Kelvin with exact formulas. Includes a dedicated oven temperature tool with Gas Mark support.

Oven Temperature Converter

°C ↔ °F ↔ Gas Mark with fan oven adjustment

Core Conversions

Celsius → Fahrenheit

°F = (°C × 9/5) + 32 (exact)

Fahrenheit → Celsius

°C = (°F − 32) × 5/9 (exact)

Celsius → Kelvin

0°C = 273.15 K (exact)

Kelvin → Celsius

273.15 K = 0°C (exact)

Fahrenheit → Kelvin

32°F = 273.15 K (exact)

Kelvin → Fahrenheit

273.15 K = 32°F (exact)

Frequently Asked Questions

What are the three main temperature scales?

Celsius (°C), Fahrenheit (°F), and Kelvin (K). Celsius and Fahrenheit are used in daily life; Kelvin is the SI unit used in science.

What is absolute zero?

Absolute zero is 0 K = −273.15°C = −459.67°F. It is the lowest theoretically possible temperature.

Why does the US use Fahrenheit?

The Fahrenheit scale was widely adopted before the metric system. The US never switched, while most other countries adopted Celsius.

What is the difference between Celsius and Kelvin?

Both use the same interval size (1°C = 1 K), but Kelvin starts at absolute zero (0 K = −273.15°C).

At what temperature are Celsius and Fahrenheit equal?

At −40°. −40°C = −40°F — the only point where both scales give the same number.