Conception Calculator
HealthEstimates the possible date(s) of conception based on the last menstrual period or due date.
How to use this calculator
Start with your values, or try a preset.
Enter Last Menstrual Period (LMP) Date and Estimated Due Date in the units shown.
Read Estimated Conception Date (based on Due Date), Estimated Conception Date (based on LMP), and Gestational Age (weeks) in the results panel. Results update as you change the inputs.
Choose a preset to load an example, then adjust the values for your situation.
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