Free, runs entirely in your browser — no sign-up, no file upload to a server.
What does Pregnancy Due Date Calculator do?
It estimates a pregnancy due date from either the last menstrual period or an estimated conception date.
How accurate is the result?
It uses standard, widely published formulas, but it's a general estimate, not a medical assessment — for guidance specific to your health, consult a doctor or qualified professional.
Is my data sent anywhere?
Everything runs in your browser — nothing you type or paste is sent to a server.
How do I report a problem or request a feature for this tool?
Use the Contact / Feedback page — select "Pregnancy Due Date Calculator" as the related tool so we know exactly which tool you mean, then describe the bug or the feature you'd like to see.