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Pregnancy Calculator

Estimate a due date and review trimester, milestone, and week-by-week pregnancy timing.

Due Date · Trimester Tracker · Week-by-Week · Fertility Window

Calculate From

Calculation Method

Cycle Length (LMP method)

days

First Day of Last Period

Estimated Due Date (EDD)

—

Pregnancy Progress —

Week 1 T1→T2 (W13) T2→T3 (W27) Week 40

—

Due Date

—

Current Week

—

Days Remaining

—

Trimester

—

Conception Date

—

Weeks Remaining

—

% Complete

—

Gestational Age

—

Trimesters

Key Pregnancy Milestones

Select Your Pregnancy Week

Gestational Week

week

Gestational age is counted from the first day of the last menstrual period — 2 weeks before actual conception. Week 1–12 = 1st trimester, 13–26 = 2nd, 27–40 = 3rd.

Adjacent Weeks

Your Cycle Details

First Day of Last Period

Cycle Length

days

Period Duration

days

Estimated Ovulation Date

—

Ovulation Day

—

Peak fertility — egg released

Peak Fertile Window

—

2 days before + ovulation day (highest chance)

Full Fertile Window

—

5 days before ovulation + ovulation day

Next Period Expected

—

Start of next menstrual cycle

Cycle Length

—

Ovulation Day

—

Fertile Window

—

Next Period

—

Days Until Ovulation

—

Luteal Phase

—

Follicular Phase

—

Pregnancy Test Date

—

This Cycle — Day-by-Day

Use caseWho should use it?

Use this calculator as a planning estimate, then compare results with real food logs and progress over time.

Next stepTrack results in CALRI

Use the app to log food, compare calories, and review macro consistency over time.

Download the app

Meal planningTurn targets into meals

Move from numbers to breakfast, lunch, dinner, and snack ideas.

Open meal planner

FAQs

Frequently Asked Questions

Quick answers about using CALRI tools for calorie tracking, recipes, and meal planning.

Is the Pregnancy Calculator medical advice?

No. CALRI calculators provide educational estimates only. Speak with a qualified healthcare professional for medical or diet decisions.

How should I use the result?

Use the result as a starting point, then track food, weight, energy, and progress over time before making changes.

Can I connect this with recipes?

Yes. Use CALRI recipes and the meal planner to build meals that match your calorie and macro targets.

Pregnancy Calculator

Continue with another CALRI calculator

Ovulation Calculator

Pregnancy Conception Calculator

Pregnancy Weight Gain Calculator

Frequently Asked Questions

Is the Pregnancy Calculator medical advice?

How should I use the result?

Can I connect this with recipes?