What is it & why use it?
Estimate your expected delivery date (EDD) based on the last menstrual period (LMP) using our Pregnancy Due Date Calculator. This tool on Calci.in helps expecting parents plan medical checkups, maternity leave, and baby essentials.

Formula (explained)
EDD = LMP + 280 days (40 weeks)
Variables: LMP = Last Menstrual Period; EDD = Expected Delivery Date.

Example calculation
If LMP = 1 Jan 2024 → EDD ≈ 7 Oct 2024.

Benefits & use cases
1. Plan doctor visits & ultrasounds
2. Prepare for maternity leave
3. Track pregnancy progress

Related calculators on Calci.in
Ovulation Calculator
Baby Growth Calculator
Vaccination Schedule Calculator

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FAQs
Q1: Is this calculator 100% accurate?
A: No, it provides an estimate. Actual delivery can be 2 weeks before or after EDD.
Q2: What is LMP?
A: Last Menstrual Period – the first day of your last menstrual cycle.
Q3: Can ultrasound change due date?
A: Yes, early ultrasound scans may revise the due date slightly.
Q4: Is 40 weeks the standard?
A: Yes, average pregnancy is around 40 weeks but may vary.