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Leg Press (45° Sled) vs Single-Leg Box Squats Strength Standards

Compare your leg press and single-leg box squats against strength standards for your sex, age range, and bodyweight. See strength levels, next targets, and priority.

First exercise: Total plates loaded on the 45-degree sled and a whole number from 1 to 12 reps. Second exercise: Strict continuous Single-Leg Box Squats reps. Use the units shown. For the first exercise, keep both feet flat and approximately shoulder-width, descend until the thighs reach at least parallel to the platform without lifting the hips or rounding the lower back. For the second exercise, lower under control until the glutes lightly contact the box without unloading, then stand to full knee and hip extension on the tested leg. Each exercise uses its own measurement type; measurements are never converted into one another.

Leg Press vs Single-Leg Box Squats Strength Standards

The men’s and women’s tables show the exact Novice-through-Elite targets for both exercises. Weight-based targets use bodyweight and display actual pounds and kilograms. Repetition and time standards keep their exercise-specific units and use age only when the individual exercise standards require it.

Age and bodyweight are never combined as row dimensions. Internal bodyweight-ratio scores are never displayed. When the exercises use unlike measurements, the table presents an explicit reference crosswalk instead of inventing a conversion.

Men’s Leg Press vs Single-Leg Box Squats Standards

Reference crosswalk: Unlike measurements are not subtracted or converted. Each column states its own reference and preserves the exercise’s real unit.

Leg Press vs Single-Leg Box Squats men’s standards crosswalk
Strength levelLeg Press at 120 lb bodyweightSingle-Leg Box Squats, Under 30
Novice168 lb76.2 kg3 reps
Intermediate252 lb114.3 kg8 reps
Advanced350 lb158.8 kg13 reps
Elite448 lb203.2 kg20 reps

Women’s Leg Press vs Single-Leg Box Squats Standards

Reference crosswalk: Unlike measurements are not subtracted or converted. Each column states its own reference and preserves the exercise’s real unit.

Leg Press vs Single-Leg Box Squats women’s standards crosswalk
Strength levelLeg Press at 100 lb bodyweightSingle-Leg Box Squats, Under 30
Novice114 lb51.7 kg3 reps
Intermediate172 lb78 kg6 reps
Advanced240 lb108.9 kg10 reps
Elite309 lb140.2 kg15 reps

How Your Leg Press vs Single-Leg Box Squats Result Is Calculated

The two exercises can use different measurements. The calculator rates each result against the standards for that exercise first, then compares the resulting strength levels and progress toward the next level. It never invents a reps-to-weight conversion.

1. Estimate the weight-based result

For Leg Press, one rep uses the weight entered. For 2–12 reps, the calculator runs both estimates and keeps the lower result.

  • Epley: weight × (1 + reps ÷ 30)
  • Brzycki: weight × 36 ÷ (37 − reps)

For a useful Leg Press vs Single-Leg Box Squats comparison, use clean, recent sets performed with consistent technique and range of motion. Lower-rep sets usually require less extrapolation.

2. Rate the Leg Press result

The leg press standards use the sex-specific standards from the individual Leg Press tool. The target adjusts to bodyweight using reference target × (user bodyweight ÷ reference bodyweight) to the two-thirds power.

3. Rate the Single-Leg Box Squats result

The exercise-specific tool supplies sex-, bodyweight-band-, and age-specific repetition thresholds plus a stretch target. The calculator uses strict continuous bodyweight repetitions and does not convert the repetitions into an estimated weight.

4. Compare strength level and progress

The lower strength level is the priority. When both exercises reach the same level, a priority appears only when one is at least 10 points farther from its next target. Otherwise, the result is Balanced. Age range changes only the exercise whose standards include age; it remains an analytics field for the other exercise.

StageWhat happens
Rate the leg pressAdjust 45-degree leg press targets to exact bodyweight with the two-thirds rule. Measurement: estimated one-rep max.
Rate the single-leg box squats setCompare strict repetitions with the applicable exercise-specific thresholds without an estimated-max conversion. Measurement: Strict continuous Single-Leg Box Squats reps.
Compare levelsUse each exercise’s own level and next target; do not compare or divide results that use different measurements.

How Men’s Leg Press and Single-Leg Box Squats Standards Differ

What the men’s standards show:

Leg Press Elite targets448 lb → 824 lb

Elite weight targets from 120 to 300 lb bodyweight.

Single-Leg Box Squats Elite targets20 reps → 10 reps

Elite direct-performance targets from the youngest to oldest listed age range at 120 lb bodyweight.

Comparison boundaryStrength level first

Raw repetitions, seconds, and weights are not divided or converted. The calculator compares each exercise’s strength tier and progress within that tier.

The line chart below preserves each exercise’s real standards measurement in its own panel. Repetitions, seconds, and weights are never converted into one another.

Line chart loading. The standards tables above contain the exact values.

How Women’s Leg Press and Single-Leg Box Squats Standards Differ

What the women’s standards show:

Leg Press Elite targets309 lb → 554 lb

Elite weight targets from 100 to 240 lb bodyweight.

Single-Leg Box Squats Elite targets15 reps → 8 reps

Elite direct-performance targets from the youngest to oldest listed age range at 100 lb bodyweight.

Comparison boundaryStrength level first

Raw repetitions, seconds, and weights are not divided or converted. The calculator compares each exercise’s strength tier and progress within that tier.

The line chart below preserves each exercise’s real standards measurement in its own panel. Repetitions, seconds, and weights are never converted into one another.

Line chart loading. The standards tables above contain the exact values.

Leg Press and Single-Leg Box Squats Exercises Used by This Calculator

For a useful comparison, perform a strict 45-degree leg press and a strict single-leg box squats using the setup and load rules below. Use strict, repeatable Leg Press and Single-Leg Box Squats tests that follow each exercise’s setup, range of motion, equipment, and load rules. Do not mix variations, assistance, partial range, momentum, or different load conventions.

Use a 45-degree plate-loaded sled leg press

Keep both feet flat and approximately shoulder-width, descend until the thighs reach at least parallel to the platform without lifting the hips or rounding the lower back, and press to controlled full knee extension. Do not enter a horizontal, vertical, selectorized, single-leg, high-foot, partial, bounced, or assisted press.

Use the Single-Leg Box Squats setup and load convention

Lower under control until the glutes lightly contact the box without unloading, then stand to full knee and hip extension on the tested leg. Stop when the rep no longer matches this test: pistol squats, skater squats, shrimp squats, assisted single-leg squats, or any shortcut that changes the score. Do not count pistol squats, skater squats, shrimp squats, assisted single-leg squats, step-ups. Do not combine multiple sets into one score. Use the same setup, range rule, and rep-counting convention for retests.

Enter one recent Leg Press result and one recent Single-Leg Box Squats result

First exercise: Total plates loaded on the 45-degree sled and a whole number from 1 to 12 reps. Second exercise: Strict continuous Single-Leg Box Squats reps. Use the units shown.

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