CalcUnit Logo

How to Calculate Pregnancy Due Date

Estimate your pregnancy due date from the last menstrual period.

The Formula

EDD = LMP + 280 days

The pregnancy due date formula uses the mathematical relationship: EDD = LMP + 280 days. Each variable in the formula represents a measurable quantity that affects the final result.

Step-by-Step Method

  1. 1Identify all input values needed for the pregnancy due date calculation.
  2. 2Substitute your known values into the formula: EDD = LMP + 280 days.
  3. 3Perform the arithmetic operations in the correct order (PEMDAS/BODMAS).
  4. 4Check that your result has the correct units and is within a reasonable range.
  5. 5Verify using the interactive Pregnancy Due Date Calculator to confirm your answer.

Related Topics

pregnancydue datelmphealth

Use the Interactive Calculator

Skip the manual math — get instant results with our free Pregnancy Due Date calculator.

Open Calculator

Related Calculators

🌸Ovulation Calculator🍺Blood Alcohol Content Calculator🐕Dog Age Calculator❤️Love Calculator🏃BMI Calculator🔥BMR Calculator