Perimenopause & Menopause Calorie and Macro Calculator

This calculator computes your TDEE with the Mifflin-St Jeor equation, then applies a deficit and protein target adjusted to your phase: premenopause, perimenopause or postmenopause.

Mifflin-St Jeor (women): BMR = 10 x weight(kg) + 6.25 x height(cm) - 5 x age - 161 (Mifflin MD et al.)

Phase-adjusted target: Target = TDEE x (1 - deficit), deficit 15 to 20% by phase, floor 1,200 cal (PROT-AGE protein recommendations for older adults)

Studies of the menopause transition show fat mass increases and lean mass decreases around the final menstrual period, independent of the slower age-related drift. Lower estrogen shifts fat storage toward the abdomen and makes muscle harder to keep. Total energy expenditure declines modestly, mostly tracking the loss of lean mass.

That is why the same diet that worked at 35 feels weaker at 52: the calorie budget shrank a little, and the muscle that anchored your metabolism needs active defending.

Aggressive deficits accelerate lean-mass loss, and during perimenopause sleep disruption and higher stress already push in that direction. A 15% deficit with high protein and 2 to 3 strength sessions per week loses fat at a steady pace while keeping the muscle that keeps your metabolism up.

If you are on hormone therapy, HRT can ease symptoms and may help preserve lean mass, but it does not change the calorie math: the targets above still apply.

Most menopausal women lose fat steadily eating about 15% below their TDEE, which typically lands between 1,400 and 1,700 calories per day. Compute your exact number with the calculator above and never go below 1,200 calories without medical supervision.

Falling estrogen shifts where fat is stored (toward the abdomen) and slightly lowers energy expenditure via lean-mass loss. Total weight change may be small while waist size grows. Strength training plus adequate protein counteracts the lean-mass side of the equation.

Aim for 1.4 to 1.6 g of protein per kg of body weight per day (about 0.65 to 0.75 g per lb). For a 170 lb woman that is roughly 108 to 124 g per day, spread across meals with 25 to 30 g each.

HRT treats symptoms (hot flashes, sleep disruption) and evidence suggests it may reduce abdominal fat accumulation, but it is not a weight-loss drug. Better sleep on HRT often makes it easier to stick to a plan, which is where the real difference shows up.