Nuchal Translucency Calculator
Health & FitnessEstimate the expected nuchal translucency measurement for a given crown-rump length and compare it against a general screening threshold.
Expected Nuchal Translucency
The typical nuchal translucency measurement expected for this crown-rump length.
General Screening Flag
A commonly-used general nuchal translucency screening threshold, independent of gestational age. This is a simplified guide, not the full age-adjusted percentile chart your doctor would use. Below the general 3.5mm screening threshold
Found this calculator useful?
From Scratch To $10K/Month In 60 Days
This is a proven money making system that takes students by the hand to make at least $10,000 per month, every month. Students get 12 weeks of guided coaching in addition to the "MPS Super Funnel" and tools.
We value your privacy and promise not to sell or misuse your information. Here's our privacy policy.
Calculator Stats
Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
Calculator Stats
Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
Health & Fitness calculators
Frequently Asked Questions
What is nuchal translucency?
Nuchal translucency is the fluid-filled space at the back of the neck of a developing baby, measured by ultrasound in the first trimester. It is used alongside other markers to help assess the likelihood of certain chromosomal conditions.
Why does this calculator use crown-rump length?
Expected nuchal translucency measurements increase somewhat with crown-rump length (which reflects gestational age), so CRL is used to estimate a typical expected value for comparison.
Is the 3.5mm threshold the exact clinical cutoff my doctor would use?
No. Clinics typically use a full percentile chart that adjusts the threshold based on exact gestational age. The 3.5mm value used here is a commonly-cited general reference point, not a substitute for a full assessment from your doctor.
What does a nuchal translucency measurement above the threshold mean?
An elevated nuchal translucency measurement does not diagnose a chromosomal condition on its own. It is one screening marker that, combined with maternal age and blood tests, informs whether further testing might be recommended.
Spot a mistake? Tell us what's wrong.
Request a calculator. The most-requested ones get built first in our monthly batch.
Request a calculatorWant this calculator on your website?
Embed the Nuchal Translucency Calculator on any site — no code needed. Customize colors, remove branding, and track usage.
