Pregnancy Due Date Calculator

Last updated: 2026-08-24

Pregnancy Due Date Calculator — Calculate estimated due date.
Inputs
Result
Enter values and press Calculate

How to use it

  1. The calculador apply the formula automatically and muestra results

Common mistakes

  • ⚠️ Not verifying that lmp are in correct units before Calculate
  • ⚠️ Redondear values intermediums before of the calculation final (pierde precision)
  • ⚠️ Apply results without Consider contexto individual or condition is special

Worked example

Calculate due date from LMP of 2026-01-15.

The date of birth estimated is 40 weeks from the last menstruación; solo 5% nacen in that date exact.