Due date back-solve
Sample
Due date from provider
What you get
Approximate conception window.
Pregnancy Conception Calculator
Conception dating is approximate; ultrasound dating prevails clinically.
Pregnancy Conception Calculator
YearMonthDay
Approx. conception
Jun 15, 2025
Due date
Mar 8, 2026
These tools provide general fitness estimates only and are not a substitute for professional medical advice.
How to Use This Tool
- Enter LMP.
- See rough conception date (LMP + 14 days) and EDD (LMP + 280 days).
- Use for planning conversations only.
Features
- 14-day ovulation approximation
- EDD alongside
- Privacy-first, local only
Example
Frequently Asked Questions
Related Tools
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Likely ovulation and conception window.
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Due date from LMP.
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Maintenance calories (TDEE) estimate.
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Tape-measure body fat estimate (Navy).
BMR Calculator
Basal metabolic rate in kcal/day.
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Devine ideal weight from height.