Deadlift 1RM Calculator
Estimate your deadlift one-rep max (1RM) from a recent set. This tool is best for sets between 2 and 10 reps performed with solid form.
What is a deadlift 1RM?
Your deadlift one-rep max is the maximum amount of weight you can lift for one technically sound repetition. It is a simple benchmark for absolute strength and a useful number for programming training loads.
Most lifters should estimate 1RM rather than testing all-out maxes frequently. Estimating from submax sets helps you train hard while reducing fatigue and injury risk.
How this deadlift calculator works
The calculator takes two inputs: the load and the number of reps. It then uses one of several established equations to estimate the weight you could likely lift once.
Common 1RM equations
- Epley: 1RM = weight × (1 + reps / 30)
- Brzycki: 1RM = weight × 36 / (37 − reps)
- Lombardi: 1RM = weight × reps0.10
No formula is perfect for every lifter. Body type, training history, rep speed, and technical skill all affect how accurate an estimate will be.
Best rep ranges for reliable estimates
If you want a solid estimate, use a challenging set in the low-to-moderate rep range:
- Best: 3–6 reps close to failure with clean technique
- Good: 2–8 reps
- Less reliable: 9+ reps, especially on deadlifts due to grip and conditioning limits
For most lifters, a heavy set of 5 gives a practical and repeatable estimate without needing a true max attempt.
How to use your estimated deadlift max
1) Set training percentages
After calculating your 1RM, use percentages for working sets. Example intensity zones:
- 70–75%: Technique and volume work
- 75–85%: General strength building
- 85–92%: Heavy strength work
- 92%+: Peaking and competition-specific practice
2) Track progress over time
Calculate from similar rep ranges each time (for example, top set of 5 every 4 weeks). Consistent testing conditions make trends easier to interpret than random max attempts.
3) Avoid ego loading
Estimated maxes are planning tools, not identity scores. If sleep, stress, or recovery is poor, adjust down and focus on quality reps.
Deadlift setup and safety checklist
- Brace hard before each rep and keep your spine neutral.
- Start with the bar over mid-foot and maintain balance.
- Build tension before pulling; avoid jerking the bar from the floor.
- Lock out by driving hips through, not by overextending your lower back.
- Stop the set if technique breaks down significantly.
Note: This calculator is educational and not a medical tool. If you have pain or injury history, get individualized guidance from a qualified coach or healthcare professional.
Example deadlift 1RM calculation
Suppose you pull 160 kg for 5 reps. Using Epley:
1RM ≈ 160 × (1 + 5/30) = 186.7 kg
You might then plan strength work around 75–85% of that estimate, roughly 140–159 kg, depending on your program and fatigue.
Frequently asked questions
Should beginners test a true 1RM deadlift?
Usually no. Beginners progress quickly with submax work. Estimated maxes are safer and still provide enough data for smart programming.
Why does my estimated 1RM differ between formulas?
Each formula models fatigue differently. Heavy, low-rep lifters may fit one equation better than another. Track one method consistently for decision-making.
How often should I recalculate?
Every 3–6 weeks works well for most lifters. Recalculate after a meaningful training block or whenever your top sets clearly improve.