Free fitness tool

Lean Bulk Calculator

Choose a modest surplus for controlled muscle gain.

Enter your details

How this calculator works

Lean-bulk calories add a small percentage to maintenance.

How to use your result

Keep your inputs consistent and compare weekly trends. Make small changes only after enough data accumulates.

Important limitation

Calculator results are estimates. Pregnancy, eating disorders, medical conditions, injuries, or concerning symptoms require qualified professional guidance.

Methodology sources

Turn these numbers into a plan

RizzFit builds your workouts, calories, and macros around your goal — and adapts as you progress.

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