1RM Percentage Chart — Training Weights by %

How 1 Rep Max Is Estimated

Your one-rep max (1RM) is the maximum weight you can lift for a single complete repetition of an exercise with proper form. Testing your true 1RM carries a meaningful injury risk — especially for compound lifts like the bench press, squat, and deadlift — so several validated formulas estimate it from a submaximal effort of multiple reps. This calculator uses three well-established formulas and provides their average, which is more reliable than any single formula alone.

Each formula was derived from regression analysis of actual lifting data, and they agree reasonably well in the 3–10 rep range. As the number of reps increases, the formulas diverge and accuracy decreases. For the best estimate, use a weight you can lift for 3–8 reps with good form.

The Formulas

Worked Example

If you bench press 80 kg for 8 reps, your estimated 1RM by each formula is: Epley = 80 × (1 + 8/30) = 101 kg, Brzycki = 80 × (36/29) = 99 kg, Lander = 80 × (100/79.93) = 100 kg. The average of the three formulas is (101 + 99 + 100) ÷ 3 ≈ 100 kg. This is the number you would use for programming training percentages. If you used a weight of 80 kg for only 5 reps, the same formulas would estimate a 1RM of approximately 93 kg — lower because the 5-rep set represents a smaller fraction of your true maximum.

FAQ-Style Explanations

Which formula is most accurate? The Epley and Brzycki formulas are both well-validated. Epley tends to be slightly more accurate for higher rep ranges (8+), while Brzycki works better for lower reps (under 8). The average of all three is the most reliable single estimate.

How many reps should I use for the estimate? For the most accurate result, use a weight you can lift for 3–10 reps with good form but not more — the formulas lose accuracy beyond 12 reps because muscular endurance, not strength, becomes the limiting factor.

Can I use these formulas for any exercise? They work best for compound lifts (bench press, squat, deadlift, overhead press). For isolation exercises, the formulas may overestimate slightly because smaller muscle groups fatigue more quickly.

Known Limitations

• The formulas are derived from specific populations and may be less accurate for very experienced lifters, beginners, or individuals with a very high proportion of fast-twitch muscle fibers.
• All formulas assume the set is performed to failure (or very close to it). If you stop several reps short of failure, the estimate will be inflated.
• The 1RM estimate is exercise-specific. Your bench press 1RM has no relationship to your squat or deadlift 1RM — each must be calculated separately.

The Standard 1RM Percentage Chart

A 1RM percentage chart is the cornerstone of any structured strength program. Once you know your one-rep max, multiplying it by a percentage gives you a precise working weight for any rep range. The percentages below represent the approximate 1RM % that a well-trained lifter can move for the listed rep count, assuming rest intervals of 2–5 minutes between sets.

• 100%: 1 rep — true max effort; use only on testing days.
• 95%: 2 reps — heavy peaking work, CNS stress.
• 90%: 3 reps — typical strength-building set.
• 85%: 5 reps — hybrid strength and hypertrophy zone.
• 80%: 8 reps — upper end of strength, lower end of hypertrophy.
• 75%: 10 reps — hypertrophy foundation.
• 70%: 12+ reps — hypertrophy and work capacity.

Periodization Models and How They Use Percentages

Periodization structures your training into blocks, each emphasizing a different adaptation. Linear periodization increases weight and decreases reps across 4–12 weeks — for example, starting at 70%/10 reps and finishing at 90%/3 reps. Block periodization separates accumulation (high volume, 60–70%), intensification (moderate volume, 75–85%), and realization (low volume, 90–95%) blocks back-to-back. Daily undulating periodization (DUP) rotates intensity across days within a single week — a heavy day at 85%, a moderate day at 75%, and a light day at 65% — which suits intermediate lifters well. Choose the model that best matches your training experience and available time.

RPE Versus 1RM Percentage

Rate of Perceived Exertion (RPE) is a 1–10 scale where 10 means you could not have done another rep and 7 means you could have done roughly 3 more. RPE lets you adjust training load daily based on fatigue, mood, and sleep, making it a more flexible system than fixed percentages alone. The approximate correlation is: RPE 9 ≈ 90% of 1RM, RPE 8 ≈ 80%, RPE 7 ≈ 75%, and RPE 6 ≈ 70%. Hybrid programs — such as RPE-based autoregulation — have a lifter pick a target % and then adjust it up or down within the session based on how the weight actually feels. This approach is especially valuable for advanced lifters whose strength fluctuates day to day.

Deload Triggers and How to Deload

A deload week reduces training volume and/or intensity to allow accumulated fatigue to dissipate before the next block. Rather than following a fixed schedule, many coaches recommend auto-regulating: deload when you notice any two or more of these signs for 1–2 consecutive weeks. Plan a deload every 4–8 weeks for recreational lifters and every 3–4 weeks for high-frequency advanced lifters. During a deload week, reduce training volume (sets) by 40–60% while keeping intensity (the % of 1RM) at 60–70%. The goal is to refresh, not to make strength gains.

• Strength stalls: you have failed to add weight or reps for 2+ consecutive sessions.
• Persistent soreness: recovery between sessions is incomplete and soreness does not clear within 24–48 hours.
• Motivation drop: training feels consistently unappealing and effort feels elevated for the same weight.
• Sleep disruption: restlessness, difficulty falling asleep, or restless nights for several days.
• Joint or tendon irritation: nagging achiness (not sharp pain) in shoulders, knees, or elbows.