Squat Max Calculator
What's my squat max? Enter a hard set — say 315 for 5 — with how hard it felt (RPE), and get your estimated 1RM in lb and kg. Free, no login.
Enter the weight you lifted for 5 reps @ RPE 8.
Quick reference: squat rep-max table
Estimated 1RM when the set was all-out (RPE 10). Had reps left in the tank? Use the calculator above — it adjusts for RPE.
| Weight lifted | × 3 | × 5 | × 8 | × 10 |
|---|---|---|---|---|
| 135 lb | ~145 | ~155 | ~170 | ~185 |
| 185 lb | ~200 | ~215 | ~235 | ~250 |
| 225 lb | ~245 | ~260 | ~285 | ~305 |
| 275 lb | ~300 | ~320 | ~350 | ~370 |
| 315 lb | ~340 | ~365 | ~400 | ~425 |
| 365 lb | ~395 | ~425 | ~465 | ~495 |
| 405 lb | ~440 | ~470 | ~515 | ~550 |
| 455 lb | ~495 | ~525 | ~580 | ~615 |
| 495 lb | ~535 | ~575 | ~630 | ~670 |
| 545 lb | ~590 | ~630 | ~695 | ~735 |
Estimates from the RPE percentage chart. Working in kilos? The calculator shows every result in both units.
Questions
How do I estimate my squat max?+
Enter a recent hard set — weight, reps, and how hard it felt on the RPE scale (RPE 10 = nothing left, RPE 8 = two reps left). The calculator maps the set to a percentage of your 1RM and works backwards. Sets of 2–6 hard reps give the tightest estimates.
High bar and low bar — same max?+
Usually not. Most lifters move more weight low bar than high bar, so treat them as separate lifts: estimate and track each on its own instead of mixing sets from both.
Does depth change the estimate?+
The estimate carries only to squats done the same way. If your rep sets are a touch high and your max attempts are to full depth, the estimate will run optimistic — keep your rep standard honest and the math stays honest.
How accurate is the estimate?+
It's an estimate — a solid planning number, not a promise. RPE is self-reported and rep endurance on squats varies a lot between lifters. Fewer reps, closer to failure, tighter estimate.
Can I save my squat max somewhere?+
That's the whole app: a free account saves your squat, bench, and deadlift maxes with full dated history, calculates working weights from reps + RPE, builds warm-up ramps, and shows exactly which plates to load. No ads, no subscription.
More free tools: RPE calculator · Bench max · Deadlift max
Save it — stop retyping your max every session
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