Baby Age Calculator (Weeks & Months)

Calculator Tools

Your baby’s age in months, weeks and days

FreePrivateInstant
Date of birth
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The tool runs inside your visitor's browser, nothing is uploaded, and a small "Powered by ToolCloak" line stays under it. The second line (script) is optional: it makes the frame fit the tool's height.

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History

All history →

Baby Age Calculator (Weeks & Months) — at a glance

Know your baby’s exact age at a glance.

You enter
Date of birth
Calculate Age
Result
Age in months
Age in weeks

How to use it — step by step

The date of birth. Today’s date is used for the age.

1

Enter your values

Fill in the fields. Default numbers are shown so you can see how it works.

2

Press Calculate Age

The answer appears at once as large result cards.

3

Copy or share

Copy the result, or share a link that opens with your numbers filled in.

Pro tips

Small things that make the result better.

✦Premature babies are often tracked by adjusted age.
✦Keep the date handy for vaccine visits.
✦Use the weeks count for early milestones.

Quick facts

Freeno signup
Privateruns in your browser
Instantresult in a second
No limituse it as often as you like

Frequently Asked Questions

How are months counted?+

Full calendar months since the birth date, plus the extra days.

What about premature babies?+

Doctors may use an adjusted age. Ask your paediatrician.

Is my data safe?+

Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.

Is this tool really free?+

Yes — completely free, no signup, no watermark and no usage limit.

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