💪 Health & Fitness Calculators

BMI, calories, training loads, and pregnancy dates — evidence-based health calculators that are honest about what estimates can and can't tell you.

• BAC CalculatorEstimate blood alcohol content from drinks, weight, and time.
• BMI CalculatorBody mass index with your healthy weight range.
• Due Date CalculatorEstimated due date from LMP, conception, or IVF — plus milestone dates.
• Naegele's Rule CalculatorThe classic +7 days, −3 months, +1 year EDD rule — shown step by step.
• One Rep Max CalculatorEstimate your 1RM from any rep set, with a %1RM chart.
• Ovulation CalculatorYour estimated ovulation date and fertile window from your cycle dates.
• Period CalculatorWhen your next period is due — with a six-cycle forecast and ovulation days.
• TDEE CalculatorYour daily calorie burn, plus cut and bulk targets.