Body, calorie and fitness calculators based on the equations clinicians and dietitians use, explained in plain English.
Body mass index, category and healthy weight range for your height.
Maintenance calories and targets to lose or gain weight.
Due date, weeks pregnant, trimester and a milestone timeline.
Fertile window, ovulation day and next three cycles on a calendar.
Goal date, daily calories and a weekly timeline with safe-rate checks.
Daily protein, carbs and fat in grams for your calorie goal and diet style.
Body fat % with the US Navy tape method, BMI estimate and ACE category.
Blood alcohol estimate with Canadian or US standard drinks and time to zero.
Estimated 1RM from any set, with 7 formulas and a percentage chart.
Daily protein target by weight, activity and goal, with a per-meal split.
Daily water target in liters, cups and ounces from weight, exercise and climate.
Likely conception date and window from a due date, last period or birth date.
Weight, length and head percentiles from the WHO growth standards, 0 to 24 months.
Every tool here uses a published, widely accepted formula such as the WHO BMI categories or the Mifflin-St Jeor equation. Each page states its limits, because a calculator is a starting point and not a diagnosis.
For medical decisions, pregnancy, or personal nutrition plans, speak with a doctor or registered dietitian.