Due Date Calculator
Estimate a pregnancy due date from your last menstrual period and cycle length.
Due date calculator guide
WeCovr's due date calculator estimates a pregnancy due date from the first day of the last menstrual period and average cycle length. It also provides a rough conception estimate and current gestational age.
What this due date calculator estimates
This calculator uses a standard LMP-based due date method with a simple cycle-length adjustment.
It is useful for a quick estimate when you want a broad pregnancy timeline.
Estimates due date from last period and cycle length.
Shows a rough conception date.
Provides a simple gestational age estimate.
Why cycle length can change the result
Not everyone ovulates on the same day of the cycle. A longer or shorter cycle can move the estimated conception date and due date slightly.
When this estimate may not match medical dating
Irregular cycles, uncertain dates, fertility treatment, or ultrasound findings can all change pregnancy dating. Clinical advice takes priority over an online estimate.
Pregnancy timeline tools
| Tool | Inputs | Useful for | Limitation |
|---|---|---|---|
| Due date calculator | LMP and cycle length | Quick due date estimate | Still an estimate |
| Pregnancy calculator | LMP and cycle length | Broader milestone timeline | Still an estimate |
| Ultrasound dating | Clinical scan | More precise dating | Requires clinical assessment |
Related WeCovr resources
FAQs
Is this due date exact?
No. It is a practical estimate based on dates you enter, and clinical dating may differ.
Why does cycle length matter?
Cycle length changes the likely ovulation date, which can shift the due date estimate slightly.
What if I do not know my exact dates?
If your dates are uncertain, the estimate will be less reliable and professional advice becomes more important.
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