Days Until Due Date Calculator
Count the days left until your estimated due date from your last period.
Your result
Only about 5% of babies arrive on their due date. This estimate uses Naegele’s rule and a 28-day cycle; ultrasound dating is more accurate early on.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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How Pregnancy Due Dates Are Calculated
Naegele’s rule, ultrasound dating and why only 4 percent of babies arrive on the day.
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How much to gain depends on your pre-pregnancy BMI.
Frequently asked questions
What does the Days Until Due Date Calculator do?
Count the days left until your estimated due date from your last period. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: how many days until my due date; countdown to baby; days left pregnant.