The MyFitness Olympic/Powerlifting Barbell Flex calculator is a scientifically-proven calculator that can be used to accurately find how much bend a barbell will display given your chosen units, type of lift, barbell, grip length, weight lifted, and plate width.
Barbell flex/bend affects the range of motion of your lifts. For the bench press, the barbell flex and therefore the possible whip of the bar can destabilize your lift and cause the lift to be more difficult; if used properly the barbell whip can be used beneficially if performing the touch-and-go bench press. For the Squat, the flex of the barbell can introduce whip which can be used to benefit coming out of the hole when timed correctly when performing a high-bar squat. For the deadlift, the greater the bar whip or flex, the better the starting the position of the lift and the greater mechanical advantage it provides.
The barbell flex/amount of bend shown is from the middle center of the barbell to the plates (ex. the amount of slack taken from the barbell before the plates leave the ground in a deadlift).
Note: This calculator assumes that the plates are loaded heaviest first (Ex. 365 pounds would be loaded with three 45 pound plates on each side then a 25 pound plate at the end on a 45lb/20kg barbell) and with the plates touching up against the collar. Weight plate loading on the barbell is shown in Step 4. All inputs required except where specified. Find out your One-Rep Max using the MyFitness One-Rep Max (1RM) Calculator.
||Ring Grip Length
(inches | cm)
|Max Grip Width
(inches | cm)
|Eleiko NxG Competition Bar - Women - 15kg||36.0 | 91.4||51.6 | 131.0|
|Eleiko NxG Competition Bar - 20kg||36.0 | 91.4||51.6 | 131.0|
|Rogue Ohio Power Bar - 45lb||31.9 | 81.0||51.5 | 130.8|
|Rogue Ohio Power Bar - 20kg||31.9 | 81.0||51.5 | 130.8|
|Rogue Ohio Deadlift Bar - 45lb||31.9 | 81.0||56.0 | 142.2|
|Rogue Ohio Deadlift Bar - 20kg||31.9 | 81.0||56.0 | 142.2|
Find out your IPF Points Powerlifting Score by using the MyFitness IPF Points Score Calculator.
If you are looking to calculate your Sinclair Score (Olympic Weightlifting), please visit our MyFitness Sinclair Score Calculator.