Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin with the exact scale formulas.
Formula: multiply the source value by 33.8
Quick Conversions
About this tool
Temperature scales are affine, not simple ratios. Values pass through Kelvin, then to the target scale.
How it works
Pick the starting scale, type a temperature, then choose the target scale. Negative values are valid for Celsius and Fahrenheit.
K = C + 273.15
C = (F − 32) × 5/9
F = C × 9/5 + 32
Examples
100 °C to °F
100 × 9/5 + 32 = 212 °F.
FAQ
Can Kelvin be negative?
Physically no. The converter still lets you type values so you can inspect the math.
Why not multiply by a single factor?
Celsius and Fahrenheit do not share a zero. An offset is required.