Home Gym Barbell & Dumbbell Plate Calculator
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IronMath shows the plates to load on each side of a barbell or dumbbell. Start with the actual weight of your bar or handle, enter the plates you own, then use the checklist to set up your lift. The calculator also finds the closest load when your exact target is not possible.
Confirm whether your plates are labelled in kilograms or pounds, make sure the total includes the bar, and secure plates with suitable collars. If the target is not exact, decide whether the lighter or heavier suggested option makes sense for your session.
Compare the equipment that makes a practical training space: racks, benches, barbells, plates, dumbbells, and cardio machines.
Browse equipment guides →Use these as quick starting points in kilogram mode with a 20 kg Olympic bar. Your actual setup depends on the plates you own, so always confirm the checklist before lifting.
Estimate your one-rep max from a recent working set. Compare seven established formulas, use the all-formulas average, and turn the result into practical training weights.
Compare 7 one-rep-max formulas →Choose a budget, available space, and training goal to create a practical starter-equipment plan. Start with the essentials, then build in stages.
Open the Home Gym Builder →The numbers lifters keep coming back for — free, printable, and made for the bar you actually own.
Every bar type in one kg & lb chart, plus how to identify the bar in your gym.
See the bar weight chart →Plates per side for every common target, 25–200 kg and 95–495 lb.
Open the loading chart →Reps to %1RM and working-weight tables for kg and lb training.
Open the 1RM chart →Subtract the bar weight from your target, then divide by two. On a 20 kg bar, 100 kg means (100 − 20) ÷ 2 = 40 kg per side — for example a 25 kg and a 15 kg plate. The calculator above does this with your exact plate inventory.
A men's Olympic barbell weighs 20 kg (44 lb), a women's bar 15 kg (33 lb), and technique bars usually 5–10 kg. See the full bar weight chart.
The calculator shows the closest achievable load under and over your target using the plates you own. A pair of 1.25 kg plates tightens your jumps from 5 kg to 2.5 kg.
Switch the calculator to dumbbell mode and set the handle weight — adjustable Olympic handles typically weigh 2–5 kg each. The per-side loading follows the same maths.