Plate calculator.

Metric plates: 25 / 20 / 15 / 10 / 5 / 2.5 / 1.25 kg. Imperial plates: 45 / 35 / 25 / 10 / 5 / 2.5 / 1.25 lb. For two-collar barbell totals — not dumbbells or machines.

Does the bar weight count?

Yes. The target is the total load including the bar, so the bar comes off first and the rest is split across two sides. Defaults are 20 kg or 45 lb, with lighter bars available. An explicitly selected bar keeps its actual mass when units change.

What does a 45 lb plate pair add?

90 lb — one plate per side. A 45 lb bar with one pair is 135 lb total, two pairs 225, three pairs 315.

Which plates does it use?

Metric: 25, 20, 15, 10, 5, 2.5, and 1.25 kg. Imperial: 45, 35, 25, 10, 5, 2.5, and 1.25 lb. Both fill heaviest first and report any unmatched load per side.

Does this work for dumbbells or machines?

No. It's two-collar barbell math. Landmines, T-bars, and plate-loaded machines load one end or use their own leverage, so per-side halving is wrong there.

Subtract the bar weight from the total you want to lift, then divide the remainder by two. That is the plate weight needed on each end. For a 225 lb target with a 45 lb bar, the calculation is (225 − 45) / 2 = 90 lb per side. Two 45 lb plates on each side supply that amount.

The result is a per-side instruction. If it says 1 × 45 + 1 × 25, load one 45 and one 25 on the left, then repeat the same stack on the right. With a 45 lb bar, that setup weighs 185 lb. Do not split the displayed stack across both sides: the calculator has already divided the plate requirement for you.

Choose the actual bar weight before entering your target. The available options are 45, 35, 25, and 15 lb. The default is a convention, not a measurement of the bar in front of you. Check its marking or the gym’s equipment information, particularly for short bars and technique bars.

On a 45 lb bar, 95 lb is one 25 on each side. For 115 lb, the tool uses one 35 per side. For 135 lb, use one 45 per side. A 155 lb total uses a 45 and a 10 on each side, while 185 lb uses a 45 and a 25. Every total includes the bar.

Two 45 lb plates per side make 225 lb; three make 315 lb; four make 405 lb. When someone says “two plates” in this context, they usually mean two full-size 45 lb plates on each side of a 45 lb bar. Ask for the total when logging a workout because plate sizes and bar weights can differ.

A smaller increase must also be divided across both ends. Moving from 225 to 230 lb requires one 2.5 lb plate on each side. Moving from 225 to 227.5 requires one 1.25 lb plate per side. Adding a 5 lb plate to each end increases the total by 10 lb, which is a common source of accidental jumps.

This calculator fills the requested load with the largest available denomination first: 45, 35, 25, 10, 5, 2.5, then 1.25 lb. It assumes enough plates of every denomination. It does not inspect your gym inventory or optimize for the fewest changes from the previous set. Read the result as one way to build the target.

If your gym has no 35 lb plates, replace each 35 with a 25 and a 10. If it has no 1.25 lb plates, a 2.5 lb total increase may be unavailable. Choose a different achievable target, or use suitable fractional plates if your gym provides them. Keep the substitution identical on both sides.

A target of 226 lb leaves 0.5 lb unmatched on each side after loading two 45s per side on the default bar. The shown plates therefore make 225 lb, not 226. The remainder is a disclosure of the shortfall. Likewise, a target below the selected bar weight cannot be built with that bar, even with no plates.

Choose kg or lb above. Metric mode uses metric plates and a 20 kg default bar. A bar marked 20 kg is about 44.1 lb, so it is not exactly a 45 lb bar. A 20 kg plate is also not exactly a 45 lb plate. Do not combine kilogram labels with pound inputs and expect an exact result. Use a consistent unit system for the full setup and your workout record.

Collars are not added separately here. If a setup requires their mass to be included, account for that before using the result; the tool has no collar input. It also does not account for sleeve length, plate thickness, or the number of plates your bar can physically hold. Verify the actual setup before lifting.

The arithmetic assumes a bar loaded symmetrically at both ends. It does not describe a landmine’s single loaded end or a machine’s effective resistance. A Smith machine may have a counterbalanced starting resistance that differs from its visible bar. Follow the equipment’s stated resistance and logging convention instead of assuming the default 45 lb.

Start with a planned load from your program or the one-rep max calculator, then use the warm-up calculator to see the ramp. Return here for each total when you need a quick plate breakdown. Record the total lifted, not just the plate weight on one side.