Which Calculator Should You Use? A Quick Guide by Goal

There are thirty-plus calculators on this site, and a common reaction is "great… which one do I actually use?" The answer depends entirely on one thing: your goal. Fat loss, muscle gain, and maintenance each need a different first calculator and a slightly different chain after it. Here's the decision guide that points you straight to the right tool — no guesswork, no wasted clicks.

Start here: pick your goal

Notice what every path has in common: TDEE first. Your maintenance calories are the hinge that everything else swings on. Get that, and the right next step is obvious.

If your goal is fat loss

You want to eat below maintenance, but not so far below that you lose muscle and your willpower. The chain:

1. TDEE Calculator — your maintenance line.
2. Calorie Deficit Calculator — subtracts a sustainable amount for steady fat loss.
3. Macro Calculator — splits the target with protein high to protect muscle.

Add the Protein Calculator if you want to nail your protein floor exactly. For the strategy behind it, see how to lose fat without constant hunger.

If your goal is muscle gain

Now you want to eat above maintenance — but only slightly, so you add muscle without piling on fat. The chain:

1. TDEE Calculator — maintenance.
2. Lean Bulk Calculator — a controlled surplus tuned for muscle, not fat.
3. Protein Calculator — enough protein to actually build.

Muscle gain is the mirror image of fat loss: opposite calorie direction, same obsession with protein and progressive training.

If your goal is maintenance or recomposition

This is the simplest setup. Your TDEE is your target — the calories that hold your weight steady. Use the TDEE Calculator, then the Macro Calculator to keep your protein, carbs, and fat balanced. If you're chasing a recomp (losing fat and gaining muscle at once), sit at or just below maintenance, push protein high, and train hard — the Macro Calculator sets it up. More on that in body recomposition.

The one rule that ties it together

Whatever your goal: TDEE first, then the goal-specific step, then macros. Start with the TDEE Calculator below, read off your maintenance number, and follow the row in the table that matches what you want. Three calculators, five minutes, and you've got a complete, personalised target instead of a guess.