Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Pregnancy Due Date & Week Calculator

Calculates your estimated due date, current pregnancy week, and trimester from your last menstrual period or conception date. Ideal for first-trimester planning and tracking gestational milestones.

Calculation Method

Day of Month (day)

Month (month)

Year (year)

Average Cycle Length (days)

Fill in the required fields to see your result.

Health

BMI & Body Fat Percentage Calculator

Calculate your BMI and estimate body fat percentage from body measurements using the U.S. Navy circumference method. Useful for anyone who wants a more complete picture of body composition beyond simple weight.

Weight (kg)

Height (cm)

Gender

Neck Circumference (cm)

Fill in the required fields to see your result.

Key differences

	Pregnancy Due Date & Week Calculator	BMI & Body Fat Percentage Calculator
Category	Health	Health
Inputs required	5	4
Result	Due Date (timestamp)	BMI + Estimated Body Fat % (combined score)
What it does	Calculates your estimated due date, current pregnancy week, and trimester from your last menstrual period or conception date. Ideal for first-trimester planning and tracking gestational milestones.	Calculate your BMI and estimate body fat percentage from body measurements using the U.S. Navy circumference method. Useful for anyone who wants a more complete picture of body composition beyond simple weight.