STRENGTH TESTING

One Rep Max (1RM) Calculator

Estimate your one-rep max for any lift using proven strength formulas. Enter the weight you lifted and how many reps to get your projected 1RM and percentage-based training loads.

Weight Lifted

lbs

Reps Performed

reps

Estimated 1RM

216

lbs

Reps% 1RMWeight

1100%216 lbs

295%205 lbs

393%201 lbs

490%194 lbs

587%188 lbs

685%183 lbs

783%179 lbs

880%173 lbs

977%166 lbs

1075%162 lbs

1173%158 lbs

Static calculators give you a snapshot. Vora gives you the full picture.

Vora dynamically adjusts your targets every day based on your wearable data, recovery status, training load, and trends over time — not a one-time estimate.

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Frequently Asked Questions

What is a one rep max (1RM)?

Your one rep max (1RM) is the heaviest weight you can lift for a single repetition with proper form. It is the standard measure of maximal strength and is used to program training percentages for strength, hypertrophy, and power development.

How accurate are 1RM calculator estimates?

Estimation formulas like Epley, Brzycki, and Lombardi are most accurate when using sets of 10 reps or fewer. Accuracy decreases with higher rep ranges because muscular endurance becomes a larger factor. For best results, use a recent heavy set of 3-5 reps.

Which 1RM formula is the most accurate?

The Epley formula (1RM = weight × (1 + reps/30)) and Brzycki formula (1RM = weight × 36/(37 - reps)) are the most widely validated. Epley tends to be slightly more accurate for higher rep ranges, while Brzycki is often preferred for lower rep sets. Most calculators average multiple formulas for a better estimate.

How does Vora use 1RM data in workouts?

Vora tracks your estimated 1RM for key lifts over time and uses it to auto-program training percentages. As you log heavier sets, your 1RM updates and workout prescriptions adjust automatically — ensuring progressive overload without manual spreadsheet tracking.