Health & Life

Evidence-based tools for pregnancy milestone estimation, estimated due date, daily energy expenditure (TDEE), and 1-rep max.

The calculators in this category are listed below. Each link opens the full calculator on CalcFree.

Calculators in this category

Track gestational age in weeks and days, current trimester progress, and upcoming milestone dates based on your last period.

How it is calculated: Gestational Age = Days since LMP ÷ 7; Estimated Due Date (EDD) = LMP + 280 Days

Estimate your baby’s expected delivery date using Naegele’s rule from your last menstrual period or known conception date.

How it is calculated: Naegele’s Rule: EDD = First Day of LMP + 1 Year − 3 Months + 7 Days

Calculate your daily maintenance calories and basal metabolic rate using the Mifflin-St Jeor formula, with macro targets for your goals.

How it is calculated: BMR (Men) = 10W + 6.25H − 5A + 5; BMR (Women) = 10W + 6.25H − 5A − 161; TDEE = BMR × Activity Factor

Estimate your maximum single lift on bench, squat, or deadlift from a working set using standard Brzycki and Epley formulas.

How it is calculated: Brzycki: 1RM = Weight × [36 ÷ (37 − Reps)]; Epley: 1RM = Weight × (1 + Reps ÷ 30)