Funny BMI Calculator

Turn BMI into a Daily Plan

BMI
TDEE kcal
Goal kcal
Protein g

Inputs

BMR = Mifflin-St Jeor by default. If body-fat % provided, uses Katch-McArdle. Goal calories adjust TDEE by your weekly rate (3500 kcal/lb or 7700 kcal/kg). Entertainment, not medical advice.

Macro Targets

Total Calories
Protein
Fat
Carbs
Fiber (est.)

Protein ~1.6–2.2 g/kg (0.7–1.0 g/lb) supports satiety/retention. Fat ≥ 0.6–0.8 g/kg for hormones. Carbs fill remaining calories or set fixed grams.

FAQ

Why calories change with goals?

Weekly change → daily calorie adjust. Example: −0.5 lb/week ≈ −250 kcal/day. We cap warnings if the target looks extreme.

Which BMR formula?

Mifflin-St Jeor (sex/age/height/weight). If you add body-fat %, we switch to Katch-McArdle (uses lean mass).

Is BMI perfect?

No. It’s a simple ratio. Body composition matters. Use this as a rough planning tool.