Scale food portions to macro targets and find the exact lb or kg plates needed on each side of an Olympic barbell.
Use nutrition values from a food label or trusted database; Convertly handles the portion math.
This calculator scales user-provided nutrition values. It does not prescribe calorie or macro targets and is not medical or dietary advice.
Enter the total target and the plate pairs available in your gym.
Existing-meal scaling multiplies raw weight, protein, carbohydrates, fat, and calories by one common factor. The factor is the selected target divided by the meal's current value for that nutrient. Because every value changes proportionally, scaling can hit one target exactly but cannot change the meal's underlying macro ratio.
The solver uses two simultaneous equations to find ingredient weights that meet protein and carbohydrate targets. It reports when the entered foods cannot produce a non-negative solution. Fat and calories are then calculated from the solved ingredient weights.
The plate loader subtracts bar and collar weight from the target, divides the remaining load equally between both sleeves, and selects available plate pairs from largest to smallest. If inventory cannot make the target exactly, it displays the closest load below the target and reports the unresolved remainder.
Competition plates follow tight tolerances, while general gym plates can vary. Confirm bar, collar, and plate specifications when exact loading matters, and use appropriate spotters and lifting safety practices.