Pregnancy Test Timing Calculator
Find the earliest day a pregnancy test is likely to be reliable.
Your result
Tests are most accurate from the day of your expected period, and better still a few days later. Hormone levels rise after implantation, so an early negative test can change later.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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Frequently asked questions
What does the Pregnancy Test Timing Calculator do?
Find the earliest day a pregnancy test is likely to be reliable. 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: when to take a pregnancy test; earliest pregnancy test date; pregnancy test date calculator.