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K.LAB / STRENGTH LAB

Make every plate count.

Estimate your one-rep max with three common equations, then calculate plate loading from a target intensity, bar, and available plates.

One-rep max estimate

Enter a recent working set

Average estimate115.5 kg
Epley116.7 kg
Brzycki112.5 kg
Lombardi117.5 kg

Target intensity

Load the barbell

75% of 1RM
Target total86.7 kg
Loadable weight86.5 kg
Plates per side15 kg × 2 + 2.5 kg × 1 + 0.5 kg × 1 + 0.25 kg × 1

Rounded down to available plates

Available plates (set 0–4 pairs per size)
25 kg
2
20 kg
2
15 kg
2
10 kg
3
5 kg
4
2.5 kg
4
1.25 kg
4
0.5 kg
2
0.25 kg
2

Loading reference

Build a loading ladder

% of estimated 1RMTarget (kg)Loadable (kg)
50%57.857.5
60%69.369
70%80.980.5
75%86.786.5
80%92.492
85%98.298
90%104103.5