Calculate your max deadlift with the most accurate 1RM calculator, using a dynamically weighted average of the four best 1RM formulas for deadlift. See the likely range for your 1RM and what each of the formulas predicts.
The chart above shows the Predicted 1RM and each formula’s 1RM estimate. The shaded range is where your actual 1RM most likely falls. This calculator works best for 3-15 reps. This is an estimation and there are a number of variables that cannot be accounted for with these formulas.
| % of 1RM | Weight | Predicted Reps |
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These formulas, which are well established and among the least conservative of the 1RM formulas, are used here because most 1RM formulas tend to underestimate for deadlift. Our calculator dynamically adjusts the weighted average based on rep count to deliver precise and consistent results. Mayhew and Berger excel for lower reps (2–4), while Wathen dominates for higher reps (5–15). Epley provides a stable contribution across ranges. Learn more about 1RM formulas or try our Bench Press or Squat 1RM calculators.
Use our full 1RM Calculator to select a specific formula or explore fitness guides.