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Health & Lifecycle

Pregnancy Due Date Calculator

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Health & Lifecycle

Pregnancy Due Date Calculator

Dating method first
Estimated due date2027-03-082w 5d as of 2026-06-20 · 261 days remaining.
2w 5dGestational ageFirst trimesterCurrent stage261Days remainingLMPMethod basis
Estimate only. Ultrasound dating, medical history, cycle irregularity, IVF clinic records and clinician judgement can change the due date.
Last menstrual period date28-day cycleMedical confirmation needed
Cycle detail

This calculator is for date orientation, not diagnosis, fertility treatment instruction, or emergency medical decisions.

Live result2027-03-082w 5d as of 2026-06-20 · 261 days remaining.
Formula used

LMP method: due date = LMP date + 280 days + (cycle length − 28 days). Conception method: conception date + 266 days. IVF method: transfer date + (266 − embryo day) days. Ultrasound method: scan date + (280 − reported gestational age in days).

This is the method behind the answer, so the result can be checked rather than simply trusted.

Live math canvas

Your numbers, formula and explanation together

Pregnancy Due Date Calculator: 2027-03-08. 2 weeks 5 days as of 2026-06-20 · first trimester estimate · cycle adjustment +0 days.

Formula applied

The exact method behind this answer

CalculationTime keeps the method visible so the number can be checked instead of blindly trusted.

LMP method: due date = LMP date + 280 days + (cycle length − 28 days). Conception method: conception date + 266 days. IVF method: transfer date + (266 − embryo day) days. Ultrasound method: scan date + (280 − reported gestational age in days).
  1. Apply the formulaLMP method: due date = LMP date + 280 days + (cycle length − 28 days). Conception method: conception date + 266 days. IVF method: transfer date + (266 − embryo day) days. Ultrasound method: scan date + (280 − reported gestational age in days).2027-03-082 weeks 5 days as of 2026-06-20 · first trimester estimate · cycle adjustment +0 days.

Your live breakdown

Current inputs in the calculation

These values come from the controls above and update when the calculator changes.

LMP year
2,026
LMP month
6
LMP day
1
As-of year
2,026
As-of month
6
As-of day
20
Cycle length
28 days

Resulting answer

2027-03-08

2 weeks 5 days as of 2026-06-20 · first trimester estimate · cycle adjustment +0 days.

Answer
2027-03-08
Live support
2 weeks 5 days as of 2026-06-20 · first trimester estimate · cycle adjustment +0 days.

Assumptions used

What this answer assumes

Estimate only; confirm pregnancy dating with a qualified health professional.

  • This is a conventional estimate only.
  • Ultrasound dating and clinical advice can change the estimated due date.
  • Dates are handled as UTC calendar days to avoid timezone drift.

Master’s Tip

How to use the result well

Master’s Tip: treat the due date as an estimate window, not a guaranteed delivery day.

Printable record

What belongs in the saved calculation

Save the inputs, result, formula, assumptions, page URL and date together so the calculation can be reviewed later.

LMP year
2,026
LMP month
6
LMP day
1
As-of year
2,026

Visual grid

This number is one point on a larger pattern

Pregnancy Due Date is not just a final answer. It is a step on a line: before and after, input and output, assumption and result.

Micro-timehours, minutes, shiftsHuman scaledays, weeks, projectsMacro-timemonths, years, calendars
InputFormulaResult
2027-03-08

CalculationTime keeps the path visible: the input, the method and the final number belong together.

CalculationTime

Pregnancy Due Date Calculation Report

Report date:

2027-03-082 weeks 5 days as of 2026-06-20 · first trimester estimate · cycle adjustment +0 days.

Inputs

LMP year
2,026
LMP month
6
LMP day
1
As-of year
2,026
As-of month
6
As-of day
20
Cycle length
28 days

Method

LMP method: due date = LMP date + 280 days + (cycle length − 28 days). Conception method: conception date + 266 days. IVF method: transfer date + (266 − embryo day) days. Ultrasound method: scan date + (280 − reported gestational age in days).

  1. For an LMP date of 2026-06-01 and 28-day cycle, the estimated due date is 2027-03-08.

Assumptions

  • This is a conventional estimate only.
  • Ultrasound dating and clinical advice can change the estimated due date.
  • Dates are handled as UTC calendar days to avoid timezone drift.

Notes

Use this space on the printed report for client, supplier, classroom, job-location, measurement, quote or approval notes.

Source: https://www.calculationtime.com/calculators/pregnancy-due-date-calculator

This report shows the calculation inputs, formula, assumptions and result for review. It is not legal, payroll, tax, engineering, financial or academic advice unless a qualified professional confirms the applicable rules.