🏋 One Rep Max Calculator
Estimate your 1RM from any rep count (1–20 reps) using the Epley formula — the gold standard for strength testing
| Exercise | Beginner | Intermediate | Advanced | Elite |
|---|---|---|---|---|
| Bench Press | 135 | 225 | 315 | 405+ |
| Back Squat | 185 | 315 | 405 | 500+ |
| Deadlift | 225 | 365 | 495 | 585+ |
| Overhead Press | 95 | 155 | 215 | 275+ |
| Barbell Row | 115 | 185 | 255 | 315+ |
| Incline Bench | 95 | 185 | 255 | 315+ |
| Exercise | Beginner | Intermediate | Advanced | Elite |
|---|---|---|---|---|
| Bench Press | 65 | 115 | 165 | 215+ |
| Back Squat | 95 | 175 | 245 | 315+ |
| Deadlift | 115 | 205 | 285 | 365+ |
| Overhead Press | 45 | 75 | 105 | 135+ |
| Barbell Row | 55 | 95 | 135 | 175+ |
| Incline Bench | 45 | 85 | 125 | 165+ |
| Formula | Equation | Best For | Accuracy |
|---|---|---|---|
| Epley | w x (1 + r/30) | General use, >1 rep | High |
| Brzycki | w x 36/(37–r) | Low rep ranges (1–10) | High (low reps) |
| Lander | 100w / (101.3 – 2.67123 x r) | Moderate rep ranges | Good |
| Lombardi | w x r^0.10 | Higher rep ranges | Moderate |
| O'Conner | w x (1 + r/40) | Higher rep ranges | Good (high reps) |
| % of 1RM | Rep Range | Training Goal | Rest Period |
|---|---|---|---|
| 95–100% | 1–2 | Max strength / testing | 3–5 min |
| 85–95% | 2–5 | Strength & power | 3–5 min |
| 75–85% | 5–8 | Strength hypertrophy | 2–3 min |
| 65–75% | 8–12 | Hypertrophy (muscle size) | 60–90 sec |
| 55–65% | 12–20 | Muscular endurance | 30–60 sec |
| Below 55% | 20+ | Endurance & conditioning | 30 sec or less |
The biggest weight for one alone repetition, usually called One Rep Max shows the biggest amount that some folk can raise in a particular exercise. One must keep right position during the move. That value helps to estimate the force and form the base of a program for training.
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One uses this One Rep Max chiefly for complex barbell exercises with several joints, as deadlifts, bench press and squats, instead of for isolation exercises as curls for biceps. It is useful to know your own numbers, because many programs for training require to work with certain percentages of the One Rep Max. For instance, some plan can sort series at 70 percent of the mximum for a separate exercise.
How to Test Your One Rep Max Safely
Testing a real One Rep Max does not deserve to be done carelessly. To prepare well, one should train with lighter loads and reduced amount during some days until a week before. One calls that a deload.
In the actual attempt, the technique most probably fails almost at the finish, what can cause injury. Actual testing of maximum leaves folk feeling exhausted during at least some days after that. One always should use safety tools, as safety poles.
A good warmup includes 5 until 10 repetitions at 50 percent of the planned maximum, later 3 until 5 repetitions at 70 percent, and then 1 until 2 repetitions at 85 until 90 percent. A pause of 2 until 5 minutes before the main set helps too fill the energy in the muscles fully.
The result does not leave doubt. Everything that succeeds to raise in that last alone repetition becomes the new maximum. No one forgets because of tiredness or because of skill to do more well the next time.
Rather than test a real maximum, many lifters estimate it by means of calculators. The idea is to choose a weight that one can raise at least a few times, and put that in an equation. For the most accurate rating, use weight for 1 until 10 repetitions, that works best.
There are formulas as those of Brzycki, Epley and Wendler for that use. The formula of Wendler is: weight raised multiplied by the number of repetitions, times 0.0333, plus the raised weight.
Too common testing of One Rep Max is not a good idea. The central nervous system can require 2 until 3 weeks to recover fully after a real maximum effort. Tendons maybe require until 6 weeks to recover fully, if they tightened.
Like this, if one tests commonly, the numbers probably are not truly maximum.
Strengthening the maximum for 5 repetitions in the main exercises will help for the One Rep Max. Beating the fear of heavy weights, one also builds mental strength. Training the position with lighter loads and good form, one can reach big gains in the One Rep Max. Newcomers should focus first on the form, noton the weight of their maximum.
