As we know One 1/°F is equal to 1 1/°Ra (1 1/°F = 1 1/°Ra).

To convert Length/Length/Degree Fahrenheit to Length/Length/Degree Rankine, multiply your 1/°F figure by 1.

Example : convert 25 1/°F to 1/°Ra:

25 1/°F = 25 × 1 1/°Ra = 1/°Ra

To convert Length/Length/Degree Rankine to Length/Length/Degree Fahrenheit, divide your 1/°Ra figure by 1.

Example : convert 25 1/°Ra to 1/°F:

25 1/°Ra = 25 ÷ 1 1/°F = 1/°F