Temperature Converters

Water freezes at 0 °C, 32 °F, and 273.15 K — three numbers for the same physical event, and the gap between them exposes why temperature scales behave differently from almost every other unit conversion. Converting meters to feet is a straight multiplication; converting Celsius to Fahrenheit is not. Each scale places its zero point at an arbitrary reference, so you must add or subtract an offset before scaling — °F = °C × 9/5 + 32, not just a single factor.

That offset is the one thing that trips people up most. Kelvin and Rankine are absolute scales that start at true zero (no molecular motion), so converting between them actually is a single multiply — but the moment Celsius or Fahrenheit enters the picture, the offset comes back. These 8 converters handle all the arithmetic automatically. The popular pairs — including Rankine to Fahrenheit and Celsius to Rankine — are pinned below for quick access.

Boiling point is the other landmark worth keeping in mind: 100 °C = 212 °F = 373.15 K. With those two anchors — freezing and boiling — you can sanity-check any result at a glance. If a converted value falls outside that 80-unit Celsius range (or the equivalent 180-unit Fahrenheit span) you know something is off before you act on the number. Browse the full list below, or jump straight to Fahrenheit to Rankine if that's what brought you here.