RepolveGet the appHack Squat estimated 1RM calculator.
Estimate your hack squat one-rep max from a completed set of 1–12 repetitions, then compare it with Repolve’s exercise benchmarks.
Calculate your hack squat score
Enter the external load recorded on this machine or cable setup. Use the same load convention across sessions; do not add your bodyweight. Use a completed set of 1–12 reps. Inputs stay in your browser.
A worked hack squat example
Illustrative hack squat set: 60 kg for 8 completed repetitions. Use the load convention shown above and compare the same equipment and technique.
- Completed set
- 60 kg × 8 reps
- Estimated 1RM
- 76.0 kg
- Exercise score
- 28 · beginner
Illustrative example using 80 kg bodyweight and male standards. Choosing female standards changes the exercise score, not the estimated max. This is one exercise score, not an overall Strength Score.
Hack Squat rep-to-max examples
Each row uses a completed set at 60 kg. Enter the external load recorded on this machine or cable setup. Use the same load convention across sessions; do not add your bodyweight. These are formula examples, not suggested loads to attempt.
| Completed reps | Estimated 1RM |
|---|---|
| 1 | 60.0 kg |
| 3 | 66.0 kg |
| 5 | 70.0 kg |
| 8 | 76.0 kg |
| 10 | 80.0 kg |
| 12 | 84.0 kg |
A one-rep set uses the entered load. Sets of 2–12 reps use weight × (1 + reps ÷ 30). The result estimates a single repetition; it is not a guarantee that you can lift that weight.
Muscles worked
The app lists quads as the primary muscle group, with glutes also involved. In Repolve’s scoring model, this exercise supplies primary evidence for quads. Training involvement and scoring coverage are different things.
Make your sessions comparable
Keep the same hack-squat machine, stance and depth. Record the equipment and how its load is labeled so sessions stay comparable.
How the estimate works
For a single rep, the estimate is the load entered. For 2–12 reps, the production engine uses the Epley estimate: weight × (1 + reps ÷ 30). It compares the resulting estimated max with bodyweight and the exercise’s sex-specific thresholds. This is an estimate from a completed set, not a prescription for your next attempt.
Hack Squat strength standards
These ratios come directly from Repolve’s production standards. They describe exercise benchmarks, not population percentiles or age-adjusted rankings.
| Reference | Score | Male | Female |
|---|---|---|---|
| Beginner | 20 | 0.75× | 0.25× |
| Novice | 40 | 1.25× | 0.75× |
| Intermediate | 60 | 2× | 1.5× |
| Advanced | 100 | 2.75× | 2.25× |
| Elite | 125 | 4× | 3.25× |
Enter the external load recorded on this machine or cable setup. Use the same load convention across sessions; do not add your bodyweight. The same unit must be used for the lift and bodyweight. Understand the standards
Track progression
Keep the completed load and repetitions alongside each estimate. Keep the same hack-squat machine, stance and depth. Record the equipment and how its load is labeled so sessions stay comparable. This page gives one exercise snapshot; saved workouts in Repolve let you follow your training history.
Learn how to compare strength progress · Understand your Strength Profile
Common variations
Hack squat machines differ in sled and lever design. A free-barbell squat or another machine’s load is not an equivalent input.
Hack Squat calculator questions
What weight should I enter?
Enter the external load recorded on this machine or cable setup. Use the same load convention across sessions; do not add your bodyweight.
How should I compare hack squat sessions?
Keep the same hack-squat machine, stance and depth. Record the equipment and how its load is labeled so sessions stay comparable.
Can I substitute another variation?
Hack squat machines differ in sled and lever design. A free-barbell squat or another machine’s load is not an equivalent input.
Related lift calculators
About this calculator
Written by Repolve to explain its own scoring model. Calculations and benchmark tables use the same engine and exercise standards as the app. Worked examples are illustrative, not customer results. Estimates describe logged performance; they do not directly measure muscle size or diagnose a training imbalance.