Strength Standards Calculator
Use our free Strength Standards Calculator to accurately calculate your resistance training metrics. Professional formulas, instant results, and 100% privacy.
Strength Standards (1RM) Calculator
Estimate your One-Rep Max using the Brzycki formula and get a full percentage-based training chart.
5
Quick:
Brzycki Formula:
1RM = Weight × (36 / (37 − Reps)) — globally recognized for reps ≤ 12.
Estimated 1-Rep Max
112
kg
Relative Strength1.40×
Strength LevelIntermediate
Wilks-Style Score—
Percentage-Based Training Chart
| %1RM | Weight | Zone | Reps |
|---|
Strength Standards
| Level | Multiplier (×BW) | Target 1RM | Status |
|---|
How to Use Strength Standards Calculator in 3 Easy Steps
1
Step 1
Enter your age, gender, and physical measurements into the fields.
2
Step 2
If applicable, enter laboratory values precisely from your medical reports.
3
Step 3
View the interpreted result and health category in the output panel.
Frequently Asked Questions
Our engine uses industry-standard formulas (e.g., Du Bois for BSA, CKD-EPI for GFR). However, results are for informational purposes only.
No. All calculations are processed locally in your browser. We never see or store your medical or fitness data.
Yes, all health and medical utilities on ToolsHub are completely free with no registration required.