Ultrasound Crown Rump Length Gestational Age Calculator
Estimate gestational age from an early ultrasound crown rump length measurement.
Compare Your Options And Get Clear Answers
Estimate gestational age from an early ultrasound crown rump length measurement.
Ultrasound Crown Rump Length Gestational Age Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Enter Values
Fill in each field with your own numbers.
Calculate
Results update as you change the inputs.
Review
Read the breakdown and the explanation.
Adjust
Change values to compare scenarios.
Ultrasound Quick Guide
Typical values for reference.
| CRL | Weeks | Days | Note |
|---|---|---|---|
| 10 mm | 7w 4d | 53 | Early |
| 30 mm | 10w 6d | 77 | First tri |
| 60 mm | 12w 5d | 89 | Scan |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Ultrasound Crown Rump Calculator FAQ
Answers to common questions about this calculator.
By a regression formula on crown rump length.
It gives a quick estimate of ultrasound crown rump length gestational age from the values you enter.
No. It is a planning estimate, so check important figures with a professional or official source.
Yes. Edit any field and the result updates when you calculate.