Calculate your due date using ultrasound measurements when the LMP-based date is uncertain.
Calculate your due date using ultrasound measurements when the LMP-based date is uncertain.
Due Date = Ultrasound Date + (280 – Gestational Days)
Ultrasound at 12 weeks 3 days on March 1 → Due Date ~September 2.
Enter your values in the fields above and click "Calculate" to get instant results. All calculations happen in your browser — nothing is sent to any server.
What is Due Date by Ultrasound Calculator?
Calculate your due date using ultrasound measurements when the LMP-based date is uncertain.
What formula does this use?
This calculator uses: Due Date = Ultrasound Date + (280 – Gestational Days)
Is this calculator free?
Yes! All calculators on CalcNest AI are 100% free with no account required.
Is my data safe?
Absolutely. All calculations run locally in your browser. We never store or transmit your input data.