One Rep Max Calculator Z (Demo)

A lightweight, open-source demo of the One Rep Max (1RM) Calculator — using the classic Epley formula. This is a simplified showcase of the full tool.

🔗 Full Version (7 formulas, warm-up generator, attempt planner): onerepmaxcalculatorz.com

What's in This Demo

• ✅ Basic 1RM estimation (Epley formula)
• ✅ Percentage-based training table (50%–100% of 1RM)
• ✅ Standalone HTML page — no WordPress or dependencies required

What's NOT in This Demo (Full Version Only)

• 7 scientific formulas (Epley, Brzycki, Lombardi, Mayhew, O'Conner, Lander, Wathan)
• Auto formula recommendation engine
• Confidence meter & strength category classifier
• Smart warm-up set generator
• Powerlifting 3-attempt meet strategy planner
• KG/LB unit switching
• WordPress shortcode integration (Kadence & Gutenberg compatible)

👉 Try the full-featured calculator free at onerepmaxcalculatorz.com

Usage

Open demo.html in any browser, or include the script in your own project:

<script src="ormz-demo-calculator.js"></script>
<script>
  const max = calculate1RM(100, 5); // weight lifted, reps performed
  console.log(max);
</script>

How It Works

1RM = weight × (1 + reps / 30)

This is the Epley formula — one of the most widely used methods for estimating one-rep max from submaximal lifts.

License

See LICENSE — free to learn from and use non-commercially. Not licensed for redistribution as a competing commercial product.

Author

One Rep Max Calculator Z Team — onerepmaxcalculatorz.com