Quick reference
- −459.67 °F = 0 °R (absolute zero)
- 0 °F = 459.67 °R
- 32 °F = 491.67 °R (water freezing)
- 212 °F = 671.67 °R (water boiling)
Type a temperature in Fahrenheit and the calculator returns Rankine using °R = °F + 459.67. Rankine is the absolute counterpart of Fahrenheit — same step size, but zero is at absolute zero.