Deadlift Calculator

Put in the weight and reps of a deadlift set pulled to failure to estimate your one-rep max (1RM) with seven formulas, along with your deadlift weights for 1 to 10 reps.

Deadlift 1RM from two to five plates

Two to five 45 lb plates per side on a 45 lb bar, a common lb setup rather than a federation standard. Pulling 405 lb for 5 reps, for example, puts the estimate at 467.7 lb.

None of the equations here was checked on the deadlift in the studies we used: Reynolds et al. (2006) tested the bench press and the leg press, and Mayhew et al. (2008) the bench press. A deadlift estimate applies those results to a lift from the floor.

What makes a deadlift good under IPF rules

In an IPF meet the deadlift is the last of the three lifts, after the squat and the bench press. Each lifter gets three attempts, and the best valid one counts toward the total (Technical Rulebook 2026, section 1). Section 4.3 describes the lift itself:

• The bar lies horizontally in front of your feet. You grip it any way you like with both hands and pull until you stand erect.
• At the finish the knees are locked straight and the shoulders are back.
• Any rising of the bar, or a deliberate try to lift it, counts as an attempt.
• The bar may not move down before you reach the finish, and you may not support it on your thighs. If it edges up the thighs without being supported, that alone is no reason to fail the lift.
• You hold the bar still until the "Down" signal. Lowering it before the signal, or lowering it without keeping control with both hands, fails the lift.