Deadlift Max Calculator
Estimates your deadlift max from a hard set, and gives the training weights that go with it.
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
The formula
Epley = weight × (1 + reps ÷ 30) Brzycki = weight × 36 ÷ (37 − reps) Lombardi = weight × reps^0.1 estimate = average of the three
Named after Boyd Epley, Matt Brzycki and V. P. Lombardi. A single rep counts as the weight lifted in all three. The typical reps in the table are a rule of thumb and vary with the lift and the person.
What to watch out for
What moves the number. Conventional and sumo stances suit different builds, so estimate from the one you use. Grip often gives out before the back and legs: straps or a mixed or hook grip can raise what you hold. Touch-and-go reps are easier than a full stop on the floor, so dead-stop sets give a more honest estimate.
Safety. A deadlift needs no spotter, because you can put the bar down, but nobody can save a rep that has gone wrong. Form tends to fade faster than on other lifts, so estimates from 3 to 5 reps are more dependable here than long sets.
Brace before the bar leaves the floor and keep it close to your shins. If your back rounds or the bar drifts forward, stop the set. A sharp pain is a reason to stop for the day.
Frequently Asked Questions
What is my deadlift max from 120 kg for 5 reps?
About 138.7 kg, averaging Epley (140.0 kg), Brzycki (135.0 kg) and Lombardi (141.0 kg).
Should I use straps for a max estimate?
Use what you plan to lift with. Straps remove grip as the limit, so the estimate shows your back and legs. A competition rules out straps, so test your grip separately if you compete.
Why not use a set of 15 for the estimate?
Long deadlift sets are limited by breathing and fatigue as much as strength, and form slips first. Estimates are less reliable above about 10 reps on any lift.