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1RM & Barbell Plate Calculator

Calculate max weight and plate loading instantly!

๐Ÿ’ช 1RM Calculator (Epley Formula)

๐Ÿ‹๏ธ Barbell Plate Loader

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What is a 1RM Calculator?

1RM (One Repetition Maximum) is the maximum weight you can lift for one repetition. Direct testing carries injury risk, so we use the Epley formula for safe estimation: 1RM = Weight ร— (1 + Reps/30). This internationally recognized formula is essential for designing weight training programs, setting goals, and tracking progress.

Common Use Cases

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Program Design
Calculate precise weights for percentage-based programs like 5x5, 5/3/1, and Texas Method.
๐ŸŽฏ
Goal Setting & Tracking
Record your current 1RM and measure periodically to visualize strength gains over time.
๐Ÿ‹๏ธ
Plate Loading Optimization
No more mental math at the gymโ€”instantly see which plates to load on each side of the bar.
๐Ÿ“ธ
Social Sharing
Export results in Instagram Story format (9:16) to share your lifting achievements.

How to Use

  1. 1
    Enter weight and reps
    Input the weight (kg) and repetitions from your recent set. Example: 100kg ร— 8 reps
  2. 2
    Check calculated 1RM
    View your estimated 1RM calculated via the Epley formula. Use this as your training baseline.
  3. 3
    Select barbell weight
    Choose whether you're using a 20kg Olympic bar or 15kg women's bar.
  4. 4
    Enter target weight and view plates
    Input your desired total weight to see a visual barbell graphic with IWF-standard colored plates and a detailed plate list.

Frequently Asked Questions