Warm-Up Sets Calculator

How a warm-up sets calculator works

You enter the weight and reps of your first working set. We hand back a short ramp of lighter sets that climb toward it, each one rounded to a load your bar and plates can actually make. That’s all it does. No hidden science, just percentages and rounding.

Take 100 kg for 5 reps on a 20 kg bar, with 2.5 kg as your smallest plate. Each side can only move 2.5 kg at a time, so the whole bar moves in 5 kg steps. The standard ramp is 40%, 60%, 75% and 90% of 100 kg, after a set with the empty bar. This warm-up sets calculator gives you this:

Every weight landed on a loadable number, so nothing got nudged. The 75 kg set needs 27.5 kg a side, which is a 25 and a 2.5. The 90 kg set is a 25 and a 10.

When a percentage doesn’t land on a plate

Not every percentage is that kind. Say you’re doing 85 kg for 3 on the same setup. 40% of 85 is 34 kg, and the nearest weight you can build is 35. 60% is 51, which becomes 50. We always round to the nearest buildable load, and a tie goes up. If two sets end up at the same weight, or one rounds to your working weight, the extra one is dropped and the tool says so.

How many sets, and how many reps

There are three lengths. Quick is three loaded sets at 50, 70 and 85%. Standard is four, at 40, 60, 75 and 90%. Long is five, at 40, 55, 70, 80 and 90%, and it’s the one we’d pick for a heavy single. Your working reps set the rep counts: if you’re lifting 1 to 3 reps, the ramp tapers to a single, and from 4 reps up it tapers to 2. The empty bar set is always 10 reps, and you can switch it off.

We picked those numbers. They follow a common shape, covered below, but we couldn’t find a study that tested this exact ladder against another. A warm-up sets calculator can only apply a convention, ours included.

Our view: three to five loaded sets is plenty for almost everyone. Past that, you’re training the warm-up.

What the research says about warm-up sets

Short version: warming up probably helps, and nobody has settled how to do it for lifting.

The broadest evidence is a 2010 meta-analysis by Fradkin and colleagues. It pooled 32 studies and found that warming up improved performance in 79% of the criteria examined, with little sign of harm. But it looks at physical performance in general, not just barbell work, and the authors noted that few well-run randomized trials existed.

For lifting, the picture’s messier. A 2021 systematic review by Ribeiro and colleagues covered 11 studies on warm-up and strength. The results weren’t consensual. Some found a specific warm-up made no difference compared with none, and others found it gave the best maximal strength. The authors suggested that a specific warm-up at loads close to the maximum may help maximal strength and reps to failure.

One 2020 study from the same group tested 40 resistance-trained men on squat and bench press, and measured bar speed rather than a max. In the squat, mean bar speed in the second test set was 0.69 m/s after six warm-up sets at 80% of the training load, against 0.67 m/s after six sets at 40%. A small gap. Their conclusion was that a few light reps aren’t enough, and that a two-step warm-up of 6 reps at 40% and then 6 at 80% did best for the bench press.

So where do 40, 60, 75 and 90 come from? Mostly from convention. The closest thing we found is the usual one rep max test routine: 5 to 10 reps at 40 to 60% of your estimated max, then 3 to 5 reps at 60 to 80%, then single attempts with 3 to 5 minutes of rest. That’s how Mayo and Kravitz describe it, citing Kraemer and Fry (1995). Our percentages are of your working weight, not your max, so it’s the same spirit rather than the same numbers.

Our view: the exact percentages matter less than the shape. Light and easy first, heavier as you go, and never so hard that the warm-up costs you reps on the working set.

Where this warm-up sets calculator falls short

It builds a ramp from two numbers, and that’s a lot to ask of two numbers.

It doesn’t know your max. A set of 5 at 100 kg could be easy or brutal for you, and the ramp is the same either way. It doesn’t know how you feel, how long you’ve been in the gym, or whether this is your first lift of the day. Rest isn’t in the plan, because we’d rather not print numbers we can’t source. We also haven’t claimed that warming up prevents injuries. We couldn’t verify that, so it’s not on the page.

And the weights are nominal. Real plates can be a little off, so treat the loads as a plan. For the plate-by-plate breakdown of any single load, our plate loader calculator shows it. If you only know your max, our one rep max calculator gives you a working weight to type into this warm-up sets calculator.