Will they have your eyes?Will they be tall?Will they look like you?When are they coming?What percentile is your baby in?

A beautifully-designed, scientifically-honest suite of predictors for the little human you're cooking. All in one place, with the actual science behind each one.

All the baby calculators people Google, finally in one beautiful place.

Free calculators with plain-English methods, confidence ranges, and sources where the evidence matters.

Most popular

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Name popularity Eye color Hair color Adult height Growth percentile Fertility costs Surrogacy costs

Trying to conceive

Before they’re here

Period calculator

Next six cycles + ovulation days.

Ovulation calendar

Six months of fertile windows at a glance.

Name popularity

SSA data going back to 1880.

Name compatibility

Does the name sound right with yours?

Conception window

Fertile days, ovulation, six-day window.

Twin probability

Family history, age, IVF — what are the odds?

IVF success rate

By age + diagnosis. SART national data.

Time to conception

Months until pregnancy, by age + cycle data.

Fertility costs

IUI, IVF, egg + embryo freezing — real ranges by US region.

Surrogacy costs

Total estimate by state, agency vs. indy.

Pregnant

While you’re carrying

How far along am I

Weeks + days, trimester, what's developing now.

Naegele's rule, current week, days to go.

Day-3, Day-5, FET, egg retrieval. ASRM math.

What they'll weigh, with realistic range.

Pregnancy weight gain

IOM ranges by BMI, week-by-week tracking.

hCG doubling time

Beta hCG vs Kadar/Barnhart reference ranges.

Expected bump size by week with normal range.

Ten kicks. Saves to your phone.

Movement timeline

First flutter, regular kicks, week by week.

Predictions

What will they look like?

Polygenic prediction with grandparents.

Childhood vs current — both matter.

Will they have your curls? Texture odds.

How tall they'll be at 18, by parent heights.

ABO + Rh inheritance, real Mendelian odds.

Genetic risks

What runs in the family?

About 1 in 10. Slightly more if you are.

Color blindness

X-linked — your maternal line tells the story.

Lactose intolerance

By ancestry. Most adults globally are.

Eczema, asthma, hay fever, food allergies.

Cilantro = soap?

Single OR6A2 variant. ~14% of Europeans taste it.

Nearsightedness

Glasses by age — myopia heritability.

Newborn & beyond

After they arrive

Growth & adult height

WHO/CDC percentiles and where they'll land.

Breast milk storage

How long it can sit out — CDC limits.

Formula amounts

Ounces per day + per feeding by weight & age.

Ready for solids?

8-sign readiness checklist (AAP / WHO).

Diaper calculator

Size, daily count, annual cost.

Sleep + wake windows

Total sleep, naps, wake windows by age.

Baby clothes size

By age, with weight + height ranges.

Tylenol & Motrin dose

Weight-based dose from the bottle's chart.

Growth percentile

WHO/CDC percentile from a single measurement.

See the actual science behind each prediction.

Every calculator explains what it can estimate, what it cannot, and which sources or population data shape the result.

Read the methodology

Real science

Every prediction shows you how accurate it is and explains the genetics or methodology behind it.

Beautiful results

Share cards designed to look great on Instagram, Pinterest, and group chats. No watermark slop.

Privacy-minded

Most calculator inputs stay in your browser. We do not sell personal data, and we avoid account walls on the core calculators.

Free for the moment

Printable birth-stats template — yours, in cream and sage.

One page, blank underlines for name, date, time, weight, and length — print it on heavy stock and fill it in by hand the day they arrive.

Download (PNG) Printable PNG for personal use.