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Free Tool
Estimate your maximum single-rep strength from any rep range. Enter the weight you lifted and how many reps you completed.
Most accurate for 1–10 reps. Accuracy decreases above 10 reps. For best results, use a weight you can lift for 3–5 reps.
Always use a spotter when testing actual max lifts.
Log your lifts, watch your estimated 1RM climb over time, and let your coach build programs around your numbers.
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