Squat 1RM Calculator
Estimate your squat one rep max with validated formulas and a complete %1RM loading table — perfect for programming hypertrophy, strength and peaking blocks for the back, front or high-bar squat.
Squat standards table
Reference profile based on common ExRx/Symmetric Strength ranges.| Level | Relative load |
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FAQ
How accurate is a squat 1RM calculator?
With a working set between 2 and 10 reps taken close to failure, the average estimate from these four formulas is typically within 5–8% of your real squat max. Accuracy drops above 12 reps, where leg endurance starts dominating the result rather than pure strength.
Should I use back squat, front squat or high-bar numbers?
Use the variant you actually trained. The math is identical, but your absolute numbers will differ — front squat is usually 75–85% of back squat, and high-bar back squat about 85–95% of low-bar. Always compare like with like across sessions.
Why does depth affect my estimate?
It does not change the formula, but it changes the interpretation. Half-squat numbers cannot be compared with parallel or below-parallel numbers, even at the same weight × reps. Standardize depth (parallel or below) before tracking 1RM progress.
How often should I recalculate my squat 1RM?
Every 4–8 weeks is enough for most strength blocks. Recalculate at the end of a block from a top set rather than testing a true single — it gives you the same information without the recovery cost of a max attempt.
Can I use it for high-rep AMRAP sets?
You can, but estimates are most reliable between 1 and 12 reps. Above 12 reps, your aerobic capacity and grip on the bar (for back squat) start limiting performance more than maximum strength, and the formulas systematically underestimate your true 1RM.
Why does adding RPE change the estimated max?
RPE captures how close to failure your set was. RPE 8 means 2 reps in reserve, so the calculator treats your set as if you had done 2 more reps. It is the single biggest accuracy upgrade over a plain weight × reps calculator and recommended for any serious tracking.