Rex says
Same equations the textbooks use — just way less awkward. Pop in your stats and I'll tell you what the number actually means for you.
Try a scenario
Click to load — tweak from there.Inputs
Result
Protein (g)
165
Carbs (g)
220
Fat (g)
73
Split total (should be 100)
100
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter daily calories (kcal).
- 2Enter protein (%).
- 3Enter carbs (%).
- 4Enter fat (%).
- 5Read your protein (g) on the right — it updates as you type.
- 6Hit Share to keep the scenario or send it to someone.
About this calculator
Translate a target calorie number into grams of protein, carbs, and fat using a chosen split.
FormulaProtein/Carbs use 4 kcal/g; fat uses 9 kcal/g.