Barbell Back Squat vs Isometric Barbell Back Squat
Compare your barbell squat and isometric barbell back squat against strength standards for your sex, age range, and bodyweight. See strength levels, next targets, and priority.
First exercise: Total barbell weight and a whole number from 1 to 12 reps. Second exercise: Barbell load and Hold time (seconds). Use the units shown. For the first exercise, keep the bar high on the traps, descend until the hip crease passes below the top of the knee, and stand to full hip and knee extension. For the second exercise, use only the strict loaded hold described here; unloaded holds, assisted holds, substituted movements, or adjacent exercise variations are outside this standard. Each exercise uses its own measurement type; measurements are never converted into one another. Age range is saved for anonymous usage reports and does not change the standards.
Barbell Squat vs Isometric Barbell Back Squat 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 Barbell Squat vs Isometric Barbell Back Squat Standards
How to read the table: Find the closest bodyweight, then use the labeled exercise row. Every strength-level entry shows one target with pounds first and kilograms beneath it at the stated reference hold time.
| Bodyweight | Exercise | Novice | Intermediate | Advanced | Elite |
|---|---|---|---|---|---|
| 120 lb54.4 kg | Barbell Squat | 244 lb110.7 kg | 278 lb126.1 kg | 314 lb142.4 kg | 347 lb157.4 kg |
| Isometric Barbell Back Squat | 30 lb13.6 kg at 60 sec | 60 lb27.2 kg at 60 sec | 96 lb43.5 kg at 60 sec | 132 lb59.9 kg at 60 sec | |
| 130 lb59 kg | Barbell Squat | 258 lb117 kg | 293 lb132.9 kg | 332 lb150.6 kg | 366 lb166 kg |
| Isometric Barbell Back Squat | 32.5 lb14.7 kg at 60 sec | 65 lb29.5 kg at 60 sec | 104 lb47.2 kg at 60 sec | 143 lb64.9 kg at 60 sec | |
| 140 lb63.5 kg | Barbell Squat | 271 lb122.9 kg | 308 lb139.7 kg | 348 lb157.9 kg | 384 lb174.2 kg |
| Isometric Barbell Back Squat | 35 lb15.9 kg at 60 sec | 70 lb31.8 kg at 60 sec | 112 lb50.8 kg at 60 sec | 154 lb69.9 kg at 60 sec | |
| 150 lb68 kg | Barbell Squat | 284 lb128.8 kg | 322 lb146.1 kg | 365 lb165.6 kg | 402 lb182.3 kg |
| Isometric Barbell Back Squat | 37.5 lb17 kg at 60 sec | 75 lb34 kg at 60 sec | 120 lb54.4 kg at 60 sec | 165 lb74.8 kg at 60 sec | |
| 160 lb72.6 kg | Barbell Squat | 296 lb134.3 kg | 336 lb152.4 kg | 381 lb172.8 kg | 420 lb190.5 kg |
| Isometric Barbell Back Squat | 40 lb18.1 kg at 60 sec | 80 lb36.3 kg at 60 sec | 128 lb58.1 kg at 60 sec | 176 lb79.8 kg at 60 sec | |
| 170 lb77.1 kg | Barbell Squat | 308 lb139.7 kg | 350 lb158.8 kg | 396 lb179.6 kg | 437 lb198.2 kg |
| Isometric Barbell Back Squat | 42.5 lb19.3 kg at 60 sec | 85 lb38.6 kg at 60 sec | 136 lb61.7 kg at 60 sec | 187 lb84.8 kg at 60 sec | |
| 180 lb81.6 kg | Barbell Squat | 320 lb145.1 kg | 364 lb165.1 kg | 412 lb186.9 kg | 454 lb205.9 kg |
| Isometric Barbell Back Squat | 45 lb20.4 kg at 60 sec | 90 lb40.8 kg at 60 sec | 144 lb65.3 kg at 60 sec | 198 lb89.8 kg at 60 sec | |
| 190 lb86.2 kg | Barbell Squat | 332 lb150.6 kg | 377 lb171 kg | 427 lb193.7 kg | 471 lb213.6 kg |
| Isometric Barbell Back Squat | 47.5 lb21.5 kg at 60 sec | 95 lb43.1 kg at 60 sec | 152 lb68.9 kg at 60 sec | 209 lb94.8 kg at 60 sec | |
| 200 lb90.7 kg | Barbell Squat | 344 lb156 kg | 390 lb176.9 kg | 442 lb200.5 kg | 487 lb220.9 kg |
| Isometric Barbell Back Squat | 50 lb22.7 kg at 60 sec | 100 lb45.4 kg at 60 sec | 160 lb72.6 kg at 60 sec | 220 lb99.8 kg at 60 sec | |
| 210 lb95.3 kg | Barbell Squat | 355 lb161 kg | 403 lb182.8 kg | 456 lb206.8 kg | 503 lb228.2 kg |
| Isometric Barbell Back Squat | 52.5 lb23.8 kg at 60 sec | 105 lb47.6 kg at 60 sec | 168 lb76.2 kg at 60 sec | 231 lb104.8 kg at 60 sec | |
| 220 lb99.8 kg | Barbell Squat | 366 lb166 kg | 416 lb188.7 kg | 471 lb213.6 kg | 519 lb235.4 kg |
| Isometric Barbell Back Squat | 55 lb24.9 kg at 60 sec | 110 lb49.9 kg at 60 sec | 176 lb79.8 kg at 60 sec | 242 lb109.8 kg at 60 sec | |
| 230 lb104.3 kg | Barbell Squat | 377 lb171 kg | 428 lb194.1 kg | 485 lb220 kg | 535 lb242.7 kg |
| Isometric Barbell Back Squat | 57.5 lb26.1 kg at 60 sec | 115 lb52.2 kg at 60 sec | 184 lb83.5 kg at 60 sec | 253 lb114.8 kg at 60 sec | |
| 240 lb108.9 kg | Barbell Squat | 388 lb176 kg | 441 lb200 kg | 499 lb226.3 kg | 550 lb249.5 kg |
| Isometric Barbell Back Squat | 60 lb27.2 kg at 60 sec | 120 lb54.4 kg at 60 sec | 192 lb87.1 kg at 60 sec | 264 lb119.7 kg at 60 sec | |
| 250 lb113.4 kg | Barbell Squat | 399 lb181 kg | 453 lb205.5 kg | 513 lb232.7 kg | 566 lb256.7 kg |
| Isometric Barbell Back Squat | 62.5 lb28.3 kg at 60 sec | 125 lb56.7 kg at 60 sec | 200 lb90.7 kg at 60 sec | 275 lb124.7 kg at 60 sec | |
| 260 lb117.9 kg | Barbell Squat | 409 lb185.5 kg | 465 lb210.9 kg | 526 lb238.6 kg | 581 lb263.5 kg |
| Isometric Barbell Back Squat | 65 lb29.5 kg at 60 sec | 130 lb59 kg at 60 sec | 208 lb94.3 kg at 60 sec | 286 lb129.7 kg at 60 sec | |
| 270 lb122.5 kg | Barbell Squat | 420 lb190.5 kg | 477 lb216.4 kg | 540 lb244.9 kg | 595 lb269.9 kg |
| Isometric Barbell Back Squat | 67.5 lb30.6 kg at 60 sec | 135 lb61.2 kg at 60 sec | 216 lb98 kg at 60 sec | 297 lb134.7 kg at 60 sec | |
| 280 lb127 kg | Barbell Squat | 430 lb195 kg | 488 lb221.4 kg | 553 lb250.8 kg | 610 lb276.7 kg |
| Isometric Barbell Back Squat | 70 lb31.8 kg at 60 sec | 140 lb63.5 kg at 60 sec | 224 lb101.6 kg at 60 sec | 308 lb139.7 kg at 60 sec | |
| 290 lb131.5 kg | Barbell Squat | 440 lb199.6 kg | 500 lb226.8 kg | 566 lb256.7 kg | 624 lb283 kg |
| Isometric Barbell Back Squat | 72.5 lb32.9 kg at 60 sec | 145 lb65.8 kg at 60 sec | 232 lb105.2 kg at 60 sec | 319 lb144.7 kg at 60 sec | |
| 300 lb136.1 kg | Barbell Squat | 450 lb204.1 kg | 511 lb231.8 kg | 579 lb262.6 kg | 639 lb289.8 kg |
| Isometric Barbell Back Squat | 75 lb34 kg at 60 sec | 150 lb68 kg at 60 sec | 240 lb108.9 kg at 60 sec | 330 lb149.7 kg at 60 sec |
Women’s Barbell Squat vs Isometric Barbell Back Squat Standards
How to read the table: Find the closest bodyweight, then use the labeled exercise row. Every strength-level entry shows one target with pounds first and kilograms beneath it at the stated reference hold time.
| Bodyweight | Exercise | Novice | Intermediate | Advanced | Elite |
|---|---|---|---|---|---|
| 100 lb45.4 kg | Barbell Squat | 143 lb64.9 kg | 166 lb75.3 kg | 197 lb89.4 kg | 220 lb99.8 kg |
| Isometric Barbell Back Squat | 18 lb8.2 kg at 60 sec | 36 lb16.3 kg at 60 sec | 58 lb26.3 kg at 60 sec | 80 lb36.3 kg at 60 sec | |
| 110 lb49.9 kg | Barbell Squat | 153 lb69.4 kg | 177 lb80.3 kg | 210 lb95.3 kg | 234 lb106.1 kg |
| Isometric Barbell Back Squat | 19.8 lb9 kg at 60 sec | 39.6 lb18 kg at 60 sec | 63.8 lb28.9 kg at 60 sec | 88 lb39.9 kg at 60 sec | |
| 120 lb54.4 kg | Barbell Squat | 162 lb73.5 kg | 188 lb85.3 kg | 222 lb100.7 kg | 248 lb112.5 kg |
| Isometric Barbell Back Squat | 21.6 lb9.8 kg at 60 sec | 43.2 lb19.6 kg at 60 sec | 69.6 lb31.6 kg at 60 sec | 96 lb43.5 kg at 60 sec | |
| 130 lb59 kg | Barbell Squat | 171 lb77.6 kg | 198 lb89.8 kg | 235 lb106.6 kg | 262 lb118.8 kg |
| Isometric Barbell Back Squat | 23.4 lb10.6 kg at 60 sec | 46.8 lb21.2 kg at 60 sec | 75.4 lb34.2 kg at 60 sec | 104 lb47.2 kg at 60 sec | |
| 140 lb63.5 kg | Barbell Squat | 180 lb81.6 kg | 208 lb94.3 kg | 246 lb111.6 kg | 275 lb124.7 kg |
| Isometric Barbell Back Squat | 25.2 lb11.4 kg at 60 sec | 50.4 lb22.9 kg at 60 sec | 81.2 lb36.8 kg at 60 sec | 112 lb50.8 kg at 60 sec | |
| 150 lb68 kg | Barbell Squat | 188 lb85.3 kg | 218 lb98.9 kg | 258 lb117 kg | 288 lb130.6 kg |
| Isometric Barbell Back Squat | 27 lb12.2 kg at 60 sec | 54 lb24.5 kg at 60 sec | 87 lb39.5 kg at 60 sec | 120 lb54.4 kg at 60 sec | |
| 160 lb72.6 kg | Barbell Squat | 196 lb88.9 kg | 228 lb103.4 kg | 269 lb122 kg | 301 lb136.5 kg |
| Isometric Barbell Back Squat | 28.8 lb13.1 kg at 60 sec | 57.6 lb26.1 kg at 60 sec | 92.8 lb42.1 kg at 60 sec | 128 lb58.1 kg at 60 sec | |
| 170 lb77.1 kg | Barbell Squat | 204 lb92.5 kg | 237 lb107.5 kg | 280 lb127 kg | 313 lb142 kg |
| Isometric Barbell Back Squat | 30.6 lb13.9 kg at 60 sec | 61.2 lb27.8 kg at 60 sec | 98.6 lb44.7 kg at 60 sec | 136 lb61.7 kg at 60 sec | |
| 180 lb81.6 kg | Barbell Squat | 212 lb96.2 kg | 246 lb111.6 kg | 291 lb132 kg | 325 lb147.4 kg |
| Isometric Barbell Back Squat | 32.4 lb14.7 kg at 60 sec | 64.8 lb29.4 kg at 60 sec | 104.4 lb47.4 kg at 60 sec | 144 lb65.3 kg at 60 sec | |
| 190 lb86.2 kg | Barbell Squat | 220 lb99.8 kg | 255 lb115.7 kg | 302 lb137 kg | 337 lb152.9 kg |
| Isometric Barbell Back Squat | 34.2 lb15.5 kg at 60 sec | 68.4 lb31 kg at 60 sec | 110.2 lb50 kg at 60 sec | 152 lb68.9 kg at 60 sec | |
| 200 lb90.7 kg | Barbell Squat | 228 lb103.4 kg | 264 lb119.7 kg | 313 lb142 kg | 349 lb158.3 kg |
| Isometric Barbell Back Squat | 36 lb16.3 kg at 60 sec | 72 lb32.7 kg at 60 sec | 116 lb52.6 kg at 60 sec | 160 lb72.6 kg at 60 sec | |
| 210 lb95.3 kg | Barbell Squat | 235 lb106.6 kg | 273 lb123.8 kg | 323 lb146.5 kg | 360 lb163.3 kg |
| Isometric Barbell Back Squat | 37.8 lb17.1 kg at 60 sec | 75.6 lb34.3 kg at 60 sec | 121.8 lb55.2 kg at 60 sec | 168 lb76.2 kg at 60 sec | |
| 220 lb99.8 kg | Barbell Squat | 243 lb110.2 kg | 281 lb127.5 kg | 333 lb151 kg | 372 lb168.7 kg |
| Isometric Barbell Back Squat | 39.6 lb18 kg at 60 sec | 79.2 lb35.9 kg at 60 sec | 127.6 lb57.9 kg at 60 sec | 176 lb79.8 kg at 60 sec | |
| 230 lb104.3 kg | Barbell Squat | 250 lb113.4 kg | 290 lb131.5 kg | 343 lb155.6 kg | 383 lb173.7 kg |
| Isometric Barbell Back Squat | 41.4 lb18.8 kg at 60 sec | 82.8 lb37.6 kg at 60 sec | 133.4 lb60.5 kg at 60 sec | 184 lb83.5 kg at 60 sec | |
| 240 lb108.9 kg | Barbell Squat | 257 lb116.6 kg | 298 lb135.2 kg | 353 lb160.1 kg | 394 lb178.7 kg |
| Isometric Barbell Back Squat | 43.2 lb19.6 kg at 60 sec | 86.4 lb39.2 kg at 60 sec | 139.2 lb63.1 kg at 60 sec | 192 lb87.1 kg at 60 sec |
How Your Barbell Squat vs Isometric Barbell Back Squat 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 Barbell Squat, 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 Barbell Squat vs Isometric Barbell Back Squat comparison, use clean, recent sets performed with consistent technique and range of motion. Lower-rep sets usually require less extrapolation.
2. Rate the Barbell Squat result
The standards use the sex-specific high-bar, full-depth back squat thresholds from the individual tool after its two-thirds scaling migration. The target adjusts to bodyweight using reference target × (user bodyweight ÷ reference bodyweight) to the two-thirds power.
3. Rate the Isometric Barbell Back Squat result
The exercise-specific model supplies sex-specific weighted-hold score thresholds; its compute implementation applies the approved age adjustment before assigning a tier. The calculator uses external added load divided by bodyweight and normalized to the exercise-specific 60-second hold with the defined load-duration curve and preserves both external load and hold time.
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 is recorded anonymously and does not change either standard.
| Stage | What happens |
|---|---|
| Rate the barbell squat | Use total-barbell estimated max and adjust targets to exact bodyweight with the two-thirds rule. Measurement: estimated one-rep max. |
| Rate the isometric barbell back squat weighted hold | Preserve both external load and hold time, then use the exercise-specific normalized weighted-hold score. Measurement: estimated one-rep max. |
| Compare levels | Use each exercise’s own level and next target; do not compare or divide results that use different measurements. |
How Men’s Barbell Squat and Isometric Barbell Back Squat Standards Differ
What the men’s standards show:
Elite weight targets from 120 to 300 lb bodyweight.
Elite weight targets from 120 to 300 lb bodyweight.
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 Barbell Squat and Isometric Barbell Back Squat Standards Differ
What the women’s standards show:
Elite weight targets from 100 to 240 lb bodyweight.
Elite weight targets from 100 to 240 lb bodyweight.
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.
Barbell Squat and Isometric Barbell Back Squat Exercises Used by This Calculator
The calculator expects repeatable barbell back squat and isometric barbell back squat results. Follow each exercise definition below so the two ratings are based on valid tests. Use strict, repeatable Barbell Squat and Isometric Barbell Back Squat 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 raw high-bar squat below parallel
Enter the bar plus all plates. Keep the bar high on the traps, descend until the hip crease passes below the top of the knee, and stand to full hip and knee extension. Do not enter per-side plates, low-bar, box, pin, partial, Smith-machine, hack-squat, wrapped, suited, or assisted results.
Use the Isometric Barbell Back Squat setup and load convention
Score is external added load divided by bodyweight, adjusted to the 60-second reference hold using the defined load-duration curve. Bodyweight is not added into the scored load for this tool. The curve balances load and hold time so very light long holds and very heavy short holds are not automatically equal. Depth, foot pressure, torso position, knee position, and bar position remain controlled; the user does not rest on pins, straps, hands, rack, partner support, or a box. Use only the strict loaded hold described here; unloaded holds, assisted holds, substituted movements, or adjacent exercise variations are outside this standard.
Enter one recent Barbell Squat result and one recent Isometric Barbell Back Squat result
First exercise: Total barbell weight and a whole number from 1 to 12 reps. Second exercise: Barbell load and Hold time (seconds). Use the units shown.
Related Tools
- Barbell Back Squat (High-Bar, Full Depth) — View the individual Barbell Squat standards and next strength-level target.
- Isometric Barbell Back Squat Strength Standards — View the individual Isometric Barbell Back Squat standards and next strength-level target.
- Isometric Squat Hold Strength Standards — Use this related standards tool to examine a closely related exercise without mixing its result into this comparison.
- Barbell Pin Squat — Use this related standards tool to examine a closely related exercise without mixing its result into this comparison.
- Safety Bar Squat — Use this related standards tool to examine a closely related exercise without mixing its result into this comparison.
- Wall Sit Strength Standards — Use this related standards tool to examine a closely related exercise without mixing its result into this comparison.