Deadlift max calculator

How to use this Deadlift max calculator

1. Enter the total completed deadlift load in the selected units.
2. Enter one to ten repetitions from the same completed set. Select Calculate.
3. Compare the two estimates and the Epley percentage table; use the plate calculator to check which loads your inventory can make.

The formula and method

The deadlift estimate uses only your completed load and repetition count. Epley = load × (1 + reps ÷ 30); Brzycki = load × 36 ÷ (37 − reps). For a completed single repetition, this tool returns the actual load with both methods.

Record conventional, sumo or trap-bar sets separately. Keep dead-stop versus touch-and-go repetitions and strap use consistent; the equations do not adjust for those differences.

The form accepts one to ten completed repetitions. The main result and percentage table use Epley; Brzycki appears as a comparison. Percentages from 50% to 90% are arithmetic fractions of the estimate, not a prediction of how many repetitions you can perform at each load.

Worked example

A completed 180 kg deadlift for 3 reps gives Epley = 198.00 kg and Brzycki = 190.59 kg. The 85% Epley percentage is 168.30 kg.

Understanding the estimate

• Both formulas are estimates, and their difference is not a confidence interval.
• Repetitions left in reserve, fatigue, equipment and technique affect how representative a set is.
• The result does not assess readiness or provide clearance to attempt a maximum.

Frequently asked questions