Due date back-solve
Sample
Due date from provider
What you get
Approximate conception window.
Pregnancy Conception Calculator
This conception estimator approximates ovulation about 14 days after the first day of the last menstrual period, then shows a rough conception date alongside a 280-day estimated due date. Real cycles vary; ultrasound dating from your clinician takes priority. Use the output for planning conversations only—not diagnosis.
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
How do you estimate conception?
We approximate ovulation ~14 days after LMP and EDD at LMP+280 days. This is educational; clinical dating uses ultrasound.
Is this medical advice?
No. This calculator is for general education and planning only. Always consult a qualified clinician for personal health decisions.
Related Tools
Conception Calculator
Likely ovulation and conception window.
Due Date Calculator
Due date from LMP.
Pregnancy Calculator
EDD, weeks, and trimester from LMP.
Age Calculator
Exact age from your birth date.
BMI Calculator
BMI and category from height and weight.
Calorie Calculator (TDEE)
Maintenance calories (TDEE) estimate.
Body Fat Calculator
Tape-measure body fat estimate (Navy).
BMR Calculator
Basal metabolic rate in kcal/day.
Ideal Weight Calculator
Devine ideal weight from height.