Eazy SEO Tools

Pregnancy Due Date Calculator

Estimate your due date from your last period — plus week-by-week progress and trimester.

Runs 100% in your browser — your input never leaves this page. How we handle your data →
Runs 100% in your browser — your input never leaves this page.
Estimate only. Confirm your due date with your doctor or midwife — never use this tool for medical decisions.

28 if you're not sure. Irregular cycles make LMP dating unreliable.

Your results will appear here.

Fill in the input above and run the tool to get started.

Honest limits

ESTIMATE ONLY — not medical advice. Naegele's rule assumes regular cycles and can be off by days or weeks; only ~5% of babies arrive on the estimated date. Confirm dating with your doctor or midwife (ideally via first-trimester ultrasound). Never use this tool for medical decisions — any concern needs a clinician.

How to use the Pregnancy Due Date Calculator

  1. Enter the first day of your last menstrual period.
  2. Enter your average cycle length (28 if unsure).
  3. Press Calculate due date — see the estimate, your current week/day, trimester, and milestones.
  4. Confirm with your clinician — a dating ultrasound is more accurate than cycle math.

Examples

Example

LMP Jan 1, 28-day cycle → estimated due date Oct 8 (280 days later). Only ~5% of babies arrive on the estimated date.

What this tool doesn't do

  • Estimate only — not medical advice. Confirm dating with your doctor or midwife.
  • Assumes regular cycles; irregular cycles or IVF need clinical dating instead.
  • Never use this tool for medical decisions — any concern needs a clinician.

Frequently asked questions

Related tools

Age Calculator

Enter your birth date — get your exact age in years, months and days, plus a countdown to your next birthday.

Use tool

Percentage Calculator

Three percentage calculators in one: X% of Y, X is what % of Y, and percentage increase or decrease.

Use tool

Discount Calculator

Sale prices, savings, and reverse discounts — see exactly what you pay and what you save.

Use tool

BMI Calculator

Your BMI, category, and healthy weight range — from height and weight in seconds.

Use tool

Calorie Calculator

Your BMR, TDEE, and calorie targets for losing, maintaining, or gaining weight.

Use tool

Loan / EMI Calculator

Monthly EMI, total interest, and full amortization — from loan amount, rate, and term.

Use tool

Need another tool?

Browse all 61 free tools — no signup, no paywalls.

Browse all tools