Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Health, Fitness & Wellness
One-Rep Max Calculator for Bench, Squat, and Deadlift
Brzycki: weight × 36 ÷ (37 − reps); averaged with Epley and Lander.
Estimate 1RM from a submaximal set using Brzycki, Epley, and Lander. Estimates only—not a diagnosis or prescription.
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Inputs
45600
112
Smart analysis
Recommendations
Tailored to your live inputs and result—guidance only, not professional advice.
- Interpret
Treat this as a planning estimate
Primary result: Estimated 1RM = 257 lbs. Re-run with optimistic and pessimistic inputs to understand the range—not just a single point.
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Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Weight lifted (lbs)
The “Weight lifted (lbs)” value used in this tool’s formula. Adjust it to see results update live.
Reps performed
The “Reps performed” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Estimate 1RM from a submaximal set using Brzycki, Epley, and Lander. Estimates only—not a diagnosis or prescription. Brzycki: weight × 36 ÷ (37 − reps); averaged with Epley and Lander. Example: 225 lb × 5 reps → estimated 1RM ≈ 253 lb.
Brzycki: weight × 36 ÷ (37 − reps); averaged with Epley and Lander.
Example: 225 lb × 5 reps → estimated 1RM ≈ 253 lb.
When to use this One-Rep Max
Common use cases
- Estimate 1RM from a submaximal set using Brzycki, Epley, and Lander.
- Sanity-check with this case: 225 lb × 5 reps → estimated 1RM ≈ 253 lb.
- The relationship is: Brzycki: weight × 36 ÷ (37 − reps); averaged with Epley and Lander.
Localized examples
- Health, Fitness & Wellness: the example on this page uses the same formula as the widget.
What you get
- Fields: Weight lifted (lbs), Reps performed
- Brzycki: weight × 36 ÷ (37 − reps); averaged with Epley and Lander.
- Example on the page: 225 lb × 5 reps → estimated 1RM ≈ 253 lb.
How to Calculate One-Rep Max Step-by-Step
- 1Enter Weight lifted (lbs), Reps performed. Use the values you have, not a catalog average, unless that is all you know.
- 2Brzycki: weight × 36 ÷ (37 − reps); averaged with Epley and Lander.
- 3Worked case: 225 lb × 5 reps → estimated 1RM ≈ 253 lb.
- 4If this number would change a drug, a diet, or a return-to-play call, take it to a clinician. The page never examined you.
Governing formula
Brzycki: weight × 36 ÷ (37 − reps); averaged with Epley and Lander.
225 lb × 5 reps → estimated 1RM ≈ 253 lb.
Example: set Weight lifted (lbs) = 225, Reps performed = 5, then read the result.
Variable definitions
- weightLifted
Weight lifted (lbs)
The “Weight lifted (lbs)” field. Default 225; typical range 45–600.
- reps
Reps performed
The “Reps performed” field. Default 5; typical range 1–12.
- The formula (Brzycki: weight × 36 ÷ (37 − reps); averaged with Epley and Lander.) does not see labs, medications, sleep, or injury history. A clinician does.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Brzycki: weight × 36 ÷ (37 − reps); averaged with Epley and Lander.
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Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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