How do you calculate squat max from reps?

Enter the weight you squatted and reps completed (1–10). The calculator applies a 1RM formula. Epley (default): 1RM = weight × (1 + reps/30). Example — 120 kg × 5 reps: 120 × (1 + 5/30) = 140 kg estimated max. Brzycki: 120 × 36/(37−5) = 135 kg. Lombardi: 120 × 5^0.10 ≈ 140.95 kg. Pick one formula and stay consistent; all three are shown so you can compare programming loads. 120 kg × (1 + 5/30) ≈ 140 kg squat 1RM

What is a good squat max?

“Good” depends on body weight, sex, depth standard, and training age. A rough male back-squat guide: beginner ~1.0× bodyweight 1RM, novice ~1.25×, intermediate ~1.5×, advanced ~2.0×, elite ~2.5×+. An 80 kg lifter at intermediate might squat ~120 kg max; 225 lb × 5 (Epley) estimates ~262.5 lb 1RM — solid intermediate territory for many gym lifters. Women and teens use lower multiples; powerlifters compare DOTS/Wilks on total (squat + bench + deadlift), not squat alone.

Which formula is best for squat — Epley or Brzycki?

For 3–8 rep sets near failure, Epley and Brzycki usually land within ~5% of each other. Our default (120 kg × 5): Epley 140 kg, Brzycki 135 kg, Lombardi 140.95 kg. Brzycki can read lower at higher reps; Lombardi sometimes reads highest. Many coaches use Epley in apps; Brzycki is common in powerlifting spreadsheets. Use the same formula when tracking block-to-block progress.

How accurate is an estimated squat 1RM?

Typical error is ±5–10% vs a true max test when the set is 3–6 reps with competition-consistent depth and near-max effort. Errors grow above 8 reps or if depth creeps shallow. 100 kg × 3 (Epley) → ~110 kg estimated vs 140 kg × 8 (Brzycki) → ~173.79 kg — the heavy triple is usually a tighter guess. Treat output as programming weight, not a max attempt without safeties and a full warm-up.

What percentage of squat max should I train at?

Common zones from this calculator’s table: 50–60% for technique and speed, 70% (~98 kg in the default example) for hypertrophy volume, 80–85% for heavy sets of 3–6, 90–95% for strength peaking. Default 120 kg × 5 → 1RM ~140 kg: 70% = 98 kg, 85% = 119 kg. Adjust by RPE (reps in reserve) — percentages are starting points, not mandates.

How many reps should I use to estimate squat max?

Best: 2–6 reps on a heavy top set with 0–2 reps in reserve. Acceptable: 7–10 (supported here but less accurate). Do not use 12+ rep sets — leg endurance and form breakdown skew formulas. 100 kg × 3 reps → ~110 kg (Epley), often closer to a true max than a 10-rep grinder at the same RPE.

Does high bar vs low bar squat change my max estimate?

Yes. Most lifters have different maxes between bar positions because torso angle and leverage change. Log the style you tested; comparing a low-bar triple to a high-bar program will misload the bar. Front squat and safety-bar squats are separate lifts — track them on their own progression, not as your back-squat 1RM.

What about squat depth?

A rep to powerlifting depth (hip crease below knee) is harder than a high quarter-squat for the same load. The calculator cannot judge depth — enter numbers from reps that meet your own standard every time. Shallow reps inflate estimates; if your “5 reps” are not true parallel, your ~140 kg estimate will read high versus a judged meet attempt.

Is it safe to test a true one-rep squat max?

Max singles carry higher injury risk than submaximal work. Requirements: power rack with safeties set correctly, full warm-up, belt/knee sleeves if you use them in training, and experience with heavy walk-outs. Many lifters never test true 1RM and only use calculators from 3–5 rep PRs — that is valid for year-round training.

Can I use this for front squat or Smith machine?

No — this page is for barbell back squat estimates. Front squat, belt squat, and Smith machine numbers differ. Track each variation separately. For bench or deadlift estimates, use our bench press max or deadlift max calculators.

How often should I update my squat max estimate?

After a block when you hit a new rep PR (e.g. 120 kg × 6 instead of × 5), or every 4–8 weeks. Do not recalculate from every warm-up set — daily readiness swings 2–5%. If estimates jump 10%+ in one week, verify bar weight (20 kg/45 lb bar included?) and rep count. 185 lb × 5 → ~215.83 lb (Epley) is a common US intermediate checkpoint.

How do I convert squat max between kg and lb?

The calculator converts internally (1 kg ≈ 2.205 lb). Example: 140 kg estimated max ≈ 308.6 lb. 225 lb × 5 (Epley) → ~262.5 lb 1RM. Enter lifts in the unit you train in; switch display unit in settings to see the table in lb or kg.

Is this squat max calculator medical advice?

No — educational strength programming only. Knee, hip, or back pain with squatting needs evaluation by a qualified clinician or physical therapist, not heavier loads from an online 1RM estimate.

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Strength · legs

Squat Max Calculator — Back Squat 1RM & Training %

Free squat max calculator: estimate your barbell back squat 1RM from a submaximal set. Default: 120 kg × 5 → ~140 kg (Epley) with loads at 70% (98 kg) and 85% (119 kg).

Last updated: May 25, 2026

120 kg × 5 → ~140 kg 1RM (Epley · Brzycki 135 kg)

225 lb × 5 → ~262.5 lb 1RM (US gym reference)

Training table 50%–100% of estimated max

Full SBD? Deadlift max calculator

Squat Max Calculator

Estimate barbell back squat 1RM from weight × reps (Epley, Brzycki, Lombardi)

Weight lifted (squat)

Repetitions completed

reps (1–10)

Use a set you own with solid depth and bracing—3–8 reps usually predict best.

Squat max result

Estimated squat 1RM (epley)

140.00 kg

120 kg × (1 + 5/30) ≈ 140 kg squat 1RM

Epley

140 kg

Brzycki

135 kg

Lombardi

140.95 kg

Training percentages

%	Weight	Goal
50%	70.00 kg	Technique / tempo · 3–6 controlled reps
60%	84.00 kg	Speed / power · 3–5 explosive reps
70%	98.00 kg	Hypertrophy volume · 6–10 reps
80%	112.00 kg	Strength–size · 4–8 reps
85%	119.00 kg	Heavy volume · 3–6 reps
90%	126.00 kg	Strength / peaking · 2–4 reps
95%	133.00 kg	Near-max singles · 1–2 reps
100%	140.00 kg	Estimated 1RM · 1 rep (test)

Note: Back squat focus—front squat and specialty bars need separate logs. Use safeties for heavy sets. Educational only.

Default snapshot (120 kg × 5 · Epley)

Estimated 1RM

140 kg

Brzycki

135 kg

70% load

98 kg

Hypertrophy volume

85% load

119 kg

Heavy sets

Formulas used

Epley

1RM = weight × (1 + reps / 30)

3–10 reps; default for most squat logs

Brzycki

1RM = weight × 36 / (37 − reps)

Low reps; often slightly below Epley at 5–8 reps

Lombardi

1RM = weight × reps^0.10

Can run highest vs Epley/Brzycki at same set

120 kg × (1 + 5/30) ≈ 140 kg squat 1RM

Rep range accuracy (estimates)

Reps	Accuracy	Note
1	Use weight as 1RM	Enter the single you hit
2–3	Very good	Heavy triples — common for squat testing
4–6	Good (default zone)	120 kg × 5 fits here
7–10	Moderate	Formulas diverge; depth consistency matters
10+	Not supported	Calculator caps at 10 reps

Squat max vs bodyweight (rough male guide)

Level	Ratio	Example @ 80 kg BW
Beginner	1.0× BW	~80 kg 1RM
Novice	1.25× BW	~100 kg 1RM
Intermediate	1.5× BW	~120 kg 1RM
Advanced	2.0× BW	~160 kg 1RM
Elite	2.5×+ BW	~200 kg+ 1RM

Worked scenarios

Default — 120 kg × 5

Epley · common strength top set

~140 kg 1RM

Epley 140 · Brzycki 135 · Lombardi 140.95

120 kg × (1 + 5/30) ≈ 140 kg squat 1RM

225 lb × 5

US gym standard · Epley

~262.5 lb 1RM

Epley 262.5 · Brzycki 253.13 · Lombardi 264.29

225 lb × (1 + 5/30) ≈ 262.5 lb squat 1RM

100 kg × 3

Heavy triple · tight estimate

~110 kg 1RM

Epley 110 · Brzycki 105.88 · Lombardi 111.61

100 kg × (1 + 3/30) ≈ 110 kg squat 1RM

140 kg × 8

Higher reps · Brzycki selected

~173.79 kg 1RM

Epley 177.33 · Brzycki 173.79 · Lombardi 172.36

140 kg × 36/(37−8) ≈ 173.8 kg squat 1RM

185 lb × 5

Intermediate US example

~215.83 lb 1RM

Epley 215.83 · Brzycki 208.13 · Lombardi 217.3

185 lb × (1 + 5/30) ≈ 215.8 lb squat 1RM

160 kg × 1

Known single — direct entry

~160 kg 1RM

Epley 160 · Brzycki 160 · Lombardi 160

160 kg × (1 + 1/30) ≈ 160 kg squat 1RM

Step-by-step: 120 kg × 5 (Epley)

1RM ≈ 120 × (1 + 5/30) = 120 × 1.1667
1RM ≈ 140 kg (rounded)
70% of 140 kg = 98 kg · 85% = 119 kg

Brzycki on the same set: 120 × 36/32 = 135 kg — about 5 kg lower than Epley for programming conservatism.

Limitations

Estimates assume barbell back squat to your consistent depth — high bar, low bar, and front squat differ
Belt, knee wraps, and monolifts change the load — use the same setup when comparing sessions
Formulas diverge more above 8 reps; input is limited to 1–10 reps
Shallow reps inflate 1RM estimates — log only reps you would count in your standard
Not a substitute for coached max testing, safeties, or medical clearance before heavy squats

References

NSCA — strength testing & programming guidance
Epley & Brzycki rep-max relationships — standard submaximal 1RM estimation literature

Strength training tool only. Use a power rack with safeties for heavy squats. Not medical advice.

Frequently Asked Questions

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Strength · legs

Squat Max Calculator — Back Squat 1RM & Training %

Free squat max calculator: estimate your barbell back squat 1RM from a submaximal set. Default: 120 kg × 5 → ~140 kg (Epley) with loads at 70% (98 kg) and 85% (119 kg).

Last updated: May 25, 2026

120 kg × 5 → ~140 kg 1RM (Epley · Brzycki 135 kg)

225 lb × 5 → ~262.5 lb 1RM (US gym reference)

Training table 50%–100% of estimated max

Full SBD? Deadlift max calculator

Squat Max Calculator

Estimate barbell back squat 1RM from weight × reps (Epley, Brzycki, Lombardi)

Weight lifted (squat)

Repetitions completed

reps (1–10)

Use a set you own with solid depth and bracing—3–8 reps usually predict best.

Squat max result

Estimated squat 1RM (epley)

140.00 kg

120 kg × (1 + 5/30) ≈ 140 kg squat 1RM

Epley

140 kg

Brzycki

135 kg

Lombardi

140.95 kg

Training percentages

%	Weight	Goal
50%	70.00 kg	Technique / tempo · 3–6 controlled reps
60%	84.00 kg	Speed / power · 3–5 explosive reps
70%	98.00 kg	Hypertrophy volume · 6–10 reps
80%	112.00 kg	Strength–size · 4–8 reps
85%	119.00 kg	Heavy volume · 3–6 reps
90%	126.00 kg	Strength / peaking · 2–4 reps
95%	133.00 kg	Near-max singles · 1–2 reps
100%	140.00 kg	Estimated 1RM · 1 rep (test)

Note: Back squat focus—front squat and specialty bars need separate logs. Use safeties for heavy sets. Educational only.

Default snapshot (120 kg × 5 · Epley)

Estimated 1RM

140 kg

Brzycki

135 kg

70% load

98 kg

Hypertrophy volume

85% load

119 kg

Heavy sets

Formulas used

Epley

1RM = weight × (1 + reps / 30)

3–10 reps; default for most squat logs

Brzycki

1RM = weight × 36 / (37 − reps)

Low reps; often slightly below Epley at 5–8 reps

Lombardi

1RM = weight × reps^0.10

Can run highest vs Epley/Brzycki at same set

120 kg × (1 + 5/30) ≈ 140 kg squat 1RM

Rep range accuracy (estimates)

Reps	Accuracy	Note
1	Use weight as 1RM	Enter the single you hit
2–3	Very good	Heavy triples — common for squat testing
4–6	Good (default zone)	120 kg × 5 fits here
7–10	Moderate	Formulas diverge; depth consistency matters
10+	Not supported	Calculator caps at 10 reps

Squat max vs bodyweight (rough male guide)

Level	Ratio	Example @ 80 kg BW
Beginner	1.0× BW	~80 kg 1RM
Novice	1.25× BW	~100 kg 1RM
Intermediate	1.5× BW	~120 kg 1RM
Advanced	2.0× BW	~160 kg 1RM
Elite	2.5×+ BW	~200 kg+ 1RM

Worked scenarios

Default — 120 kg × 5

Epley · common strength top set

~140 kg 1RM

Epley 140 · Brzycki 135 · Lombardi 140.95

120 kg × (1 + 5/30) ≈ 140 kg squat 1RM

225 lb × 5

US gym standard · Epley

~262.5 lb 1RM

Epley 262.5 · Brzycki 253.13 · Lombardi 264.29

225 lb × (1 + 5/30) ≈ 262.5 lb squat 1RM

100 kg × 3

Heavy triple · tight estimate

~110 kg 1RM

Epley 110 · Brzycki 105.88 · Lombardi 111.61

100 kg × (1 + 3/30) ≈ 110 kg squat 1RM

140 kg × 8

Higher reps · Brzycki selected

~173.79 kg 1RM

Epley 177.33 · Brzycki 173.79 · Lombardi 172.36

140 kg × 36/(37−8) ≈ 173.8 kg squat 1RM

185 lb × 5

Intermediate US example

~215.83 lb 1RM

Epley 215.83 · Brzycki 208.13 · Lombardi 217.3

185 lb × (1 + 5/30) ≈ 215.8 lb squat 1RM

160 kg × 1

Known single — direct entry

~160 kg 1RM

Epley 160 · Brzycki 160 · Lombardi 160

160 kg × (1 + 1/30) ≈ 160 kg squat 1RM

Step-by-step: 120 kg × 5 (Epley)

1RM ≈ 120 × (1 + 5/30) = 120 × 1.1667
1RM ≈ 140 kg (rounded)
70% of 140 kg = 98 kg · 85% = 119 kg

Brzycki on the same set: 120 × 36/32 = 135 kg — about 5 kg lower than Epley for programming conservatism.

Limitations

Estimates assume barbell back squat to your consistent depth — high bar, low bar, and front squat differ
Belt, knee wraps, and monolifts change the load — use the same setup when comparing sessions
Formulas diverge more above 8 reps; input is limited to 1–10 reps
Shallow reps inflate 1RM estimates — log only reps you would count in your standard
Not a substitute for coached max testing, safeties, or medical clearance before heavy squats