Compare calculators

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

Fetal Growth Percentile Calculator

Estimates fetal weight from ultrasound biometry (BPD, HC, AC, FL) and plots it against gestational-age percentiles. Used by clinicians and expectant parents to detect growth restriction or macrosomia.

Biparietal Diameter (BPD) (mm)

Head Circumference (HC) (mm)

Abdominal Circumference (AC) (mm)

Femur Length (FL) (mm)

Fill in the required fields to see your result.

Pregnancy

Pregnancy Calorie Needs Calculator

Calculates how many daily calories you need during pregnancy based on your pre-pregnancy intake and current trimester, using WHO/USDA-aligned trimester additions. Use it to ensure adequate nutrition without excessive weight gain.

Pre-pregnancy Daily Calories (calories)

Current Trimester

Fill in the required fields to see your result.

Key differences

	Fetal Growth Percentile Calculator	Pregnancy Calorie Needs Calculator
Category	Pregnancy	Pregnancy
Inputs required	4	2
Result	Estimated Fetal Weight (grams)	Daily calorie needs (calories)
What it does	Estimates fetal weight from ultrasound biometry (BPD, HC, AC, FL) and plots it against gestational-age percentiles. Used by clinicians and expectant parents to detect growth restriction or macrosomia.	Calculates how many daily calories you need during pregnancy based on your pre-pregnancy intake and current trimester, using WHO/USDA-aligned trimester additions. Use it to ensure adequate nutrition without excessive weight gain.