Weight Goal Planner: Calories, Macros, Timeline

Weight Manager Planner

Weight change comes down to calories in vs. calories out. This tool estimates your maintenance calories at your current weight and calculates intake targets for fat loss, muscle gain, or recomposition.

1) Pick your goal

Advice: Check-in and recalibrate every 14–21 days or when progress stalls.

2) Your stats

Activity level

3) Optional: body fat (for composition estimates)

Body fat % improves fat-vs-lean projections and recomposition estimates. Leave it blank if you don’t know it.

Body fat percentage visual reference for male and female bodies

Use only to orient yourself. Measuring beats guessing. Tape takes ~60 seconds.

Have you been resistance training consistently for at least 6 months (average ≥3 sessions/week) and are you more muscular than average for your height?
Optional: Don’t know your body fat? Estimate it

Reminder: the most “accurate” at-home method is the one you can repeat consistently.

Info: Uses US Navy circumference method (waist/neck/height + hip for women) and Jackson–Pollock 3-site / 7-site.

4) Results: Fat loss

Maintenance calories at specified activity level (current weight)
kcal/day
Cut calories at selected pace
kcal/day
Reminder: lean-mass retention is key — high protein + resistance training materially helps.

Fat loss pace

Select one. Your pace is shown as expected scale-weight change per week. It corresponds to a calorie deficit relative to your estimated maintenance.
Important: faster isn’t better if adherence breaks.

Projected timeline

Range assumes real-world variance. “Likely” matches the selected pace.

MilestoneBestLikelyWorst
Date to target weight
Date to target body fat %

Maintenance at goal weight

Estimated maintenance once the new weight stabilizes
kcal/day

Nutritional Macro split

Protein
%
g/kg g/day
g/kg
Fat
%
g/kg g/day
% kcal
Carbohydrates
%
g/kg g/day
Fiber target
g/day

Calibration (so the plan stays accurate)

This is an initial estimate; adjust after 14–21 days using trend weight.

  • Track daily weigh-ins and look at a 7–14 day trend.
  • After 14–21 days, if your trend isn’t moving near the target %BW/week, adjust calories by ~3–5% and reassess.
Quick safety note: Not recommended without clinician oversight for: pregnancy, under 18, active eating disorder, or medical conditions requiring specialized nutrition management.
Export your inputs + results (copy/paste)

Use this text in an AI prompt for meal planning and training planning. (Inputs + outputs only.)

Scientific basis (formulas used)
  • Maintenance calories (TDEE): BMR × activity factor.
  • BMR default: Mifflin–St Jeor.
  • BMR optional: Katch–McArdle or Cunningham using LBM.
  • Body fat estimators: US Navy circumference; Jackson–Pollock 3-site / 7-site → Siri.
  • Energy ↔ weight change: ~7700 kcal per kg heuristic.
  • Macro math: Protein 4 kcal/g, Carbs 4 kcal/g, Fat 9 kcal/g.
  • Fiber: 14–18 g per 1000 kcal.

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