Jason Grubb Fitness / Nutrition Tool

Get your starting nutrition targets

Coaching-specific calorie, protein, hydration, and meal-split targets for active athletes. Fast, practical, and built to give you a solid starting point before you adjust from real-world feedback.
Start the Calculator

Built for athletes who train hard, not random internet macros.

What you get

Calories

A realistic starting intake based on your profile and goal.

Protein

Anchored to target body weight so the recommendation stays usable.

Hydration + meal split

Enough structure to execute well without turning food into a side hustle.

JGFNutrition Tool

Performance fuel for athletes who train hard

This is a starting-point tool, not fake precision. We’ll give you useful numbers to run for 14 to 21 days, then adjust from real trend data.

These are starting targets for generally healthy adults. This is not medical nutrition therapy. If you have kidney disease, diabetes, blood pressure or fluid restrictions, pregnancy-related needs, an eating disorder history, or medication-driven nutrition needs, work with your clinician before changing nutrition targets.

Step 1

Get your starting targets

You’ll get daily calories, protein, hydration, and a practical meal split based on your goal and training load.

Useful in under 2 minutes
Built for active athletes
No gate before the value