FPS and Joules Calculator
Enter your RIF's details below and use the calculator to find out if you're safe to use your RIF.
How to use our FPS Calculator
Pick your rate of fire
Enter your chronograph reading
Select your weight of BB
Press submit to see your results
or 0 Meters Per Second
While the equation used to calculate the information given is accurate, this should always be used as a rough guide and never taken as fact. Chairsofters.co.uk take no responsibility for incorrect use of RIF in public by us of our calculator.