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 Blood Volume Calculator

Estimate how pregnancy expands your blood volume and how that dilution affects your hemoglobin level. Useful for understanding anemia risk and iron needs at each stage of pregnancy.

Pre-Pregnancy Weight (lbs)

Pregnancy Week (weeks)

Pregnancy Type

Baseline Hemoglobin (g/dL)

Fill in the required fields to see your result.

Key differences

	Fetal Growth Percentile Calculator	Pregnancy Blood Volume Calculator
Category	Pregnancy	Pregnancy
Inputs required	4	4
Result	Estimated Fetal Weight (grams)	Expected Hemoglobin Level (g/dL)
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.	Estimate how pregnancy expands your blood volume and how that dilution affects your hemoglobin level. Useful for understanding anemia risk and iron needs at each stage of pregnancy.