Enter Squat Set Details
Example Data Table
| Lifted Weight | Reps | Formula | Estimated Result | Best Use |
|---|---|---|---|---|
| 100 kg | 5 | Epley | 116.67 kg | General strength estimate |
| 225 lb | 8 | Brzycki | 279.31 lb | Moderate rep testing |
| 140 kg | 3 | Average | Near 154 kg | Balanced planning |
Formula Used
This calculator compares several common one rep max equations. It can also average them for a smoother result.
- Epley:
1RM = weight × (1 + reps / 30) - Brzycki:
1RM = weight × 36 / (37 - reps) - Lombardi:
1RM = weight × reps ^ 0.10 - O'Conner:
1RM = weight × (1 + 0.025 × reps) - Training max:
training max = estimated 1RM × selected percent - Plate per side:
(target load - bar weight) / 2
When RPE is below 10, the calculator adds estimated reps in reserve. For example, RPE 8 adds about two effective reps.
How to Use This Calculator
- Enter the squat weight you lifted.
- Select kilograms or pounds.
- Add the completed reps.
- Choose RPE if the set was not a maximum effort.
- Select a formula or use the average option.
- Add bodyweight for strength ratio feedback.
- Set training and target percentages.
- Press calculate and review the result above the form.
- Download CSV or PDF for your training log.
Squat Max Planning Guide
Why Squat Max Estimates Matter
A squat one rep max estimate helps you plan heavy training without testing a true maximum every week. It uses a completed set, then predicts the heaviest single you may lift under similar conditions. This is useful for strength cycles, peaking blocks, and general progress tracking. It also helps compare different squat styles. A pause squat may be lower than a normal back squat. A front squat may also show a different strength profile.
Use More Than One Formula
No equation is perfect. Rep speed, depth, fatigue, stance, and equipment can change the result. That is why this calculator includes several formulas. The average option can reduce extreme values. Lower rep sets are usually more reliable. Sets of three to six reps often give cleaner estimates. Very high rep sets can overstate or understate max strength.
Plan Safer Training Loads
The training max option is helpful for steady progress. Many lifters use ninety percent of estimated max. This creates room for fatigue, imperfect days, and technique practice. The safety buffer gives another limit. It can suggest a heavy single that feels challenging but controlled. The target percentage field is useful for daily work sets. You can quickly find loads for volume, speed work, or heavier practice.
Track Bodyweight Strength
Bodyweight ratio shows how your squat compares with your size. This number is simple, but useful. A heavier lifter may move more absolute load. A lighter lifter may show a higher ratio. Use both numbers when judging progress. Keep notes about sleep, soreness, belt use, shoes, and squat depth. These details make future comparisons more honest and practical.
FAQs
What is a squat one rep max?
It is the estimated heaviest squat you can complete for one clean rep. The estimate comes from lifted weight and reps.
Which formula should I use?
Use the average option for balanced planning. Use Epley or Brzycki when you want common gym estimates from moderate rep sets.
Is this accurate for high reps?
High-rep estimates are less reliable. For better accuracy, use a hard set between three and eight reps with consistent squat depth.
What does RPE mean?
RPE means rate of perceived exertion. RPE 10 is maximum effort. RPE 8 usually means about two reps left.
What is a training max?
A training max is a reduced max used for programming. It helps manage fatigue and keeps weekly loading more sustainable.
Can I use pounds instead of kilograms?
Yes. Select pounds from the unit field. The calculator also shows a converted one rep max in the other unit.
Why enter bar weight?
Bar weight helps estimate plate weight per side. This makes target loading easier when setting up the barbell.
Should I test a true max often?
Most lifters should not max out too often. Estimated maxes can guide training while reducing strain and recovery cost.