Pregnancy & Women

What are pregnancy & women tools?

Pregnancy & women tools are free online calculators that answer the questions women ask most often around fertility, pregnancy, and personal sizing. From a last period date and cycle length they work out due dates, fertile windows, and how far along a pregnancy is; from a few body measurements they find the right bra and ring sizes. People trying to conceive, those recently pregnant, and anyone shopping for a good fit use them for quick, private answers.

Pregnancy & Women tools on Toolzent

Here are the pregnancy and women calculators currently available, with what each one does.

Tool	What it does
Due Date Calculator	Adds 280 days to your LMP and adjusts for cycle length to estimate your due date, weeks along, and trimester.
Ovulation Calculator	Estimates your ovulation day, your most fertile window, and your next period date from your LMP and cycle length.
Pregnancy Week Calculator	Counts the days from your LMP to today to show how many weeks and days pregnant you are, your trimester, and progress.
Conception Date Calculator	Works backward from your LMP or due date to estimate when conception likely occurred and your fertile window.
Bra Size Calculator	Converts your band and bust measurements into a band size and cup size, including common regional equivalents.
Ring Size Calculator	Turns a finger’s circumference or diameter into a ring size across US, UK, and EU sizing charts.

How cycle length and LMP drive the fertility results

The four pregnancy and fertility tools share the same two inputs, so it helps to see how they connect. Each treats your LMP as day zero and a luteal phase of about 14 days. The table below uses a 28-day cycle so you can compare the methods side by side.

Question	Method	Example (28-day cycle)
When is my baby due?	LMP + 280 days, then + (cycle minus 28)	LMP + 280 days
When did I conceive?	LMP + (cycle minus 14) days	LMP + 14 days
When do I ovulate?	LMP + (cycle minus 14) days	LMP + 14 days
How far along am I?	(today minus LMP) split into weeks and days	70 days = 10 weeks and 0 days

Because the luteal phase is treated as a steady 14 days, the part that varies is the stretch before ovulation. So a longer cycle moves ovulation and the due date later, and a shorter cycle moves them earlier, by one day per day of difference from 28. The Bra Size and Ring Size Calculators are separate: they read body measurements instead of dates.

How do I choose the right tool?

Match the tool to the question you are actually asking:

• Trying to conceive and want your fertile days? Use the Ovulation Calculator to find your ovulation day and fertile window.
• Just got a positive test and want a due date? Use the Due Date Calculator for an estimated delivery date and trimester.
• Want to know when conception likely happened? Use the Conception Date Calculator to work backward from your LMP or due date.
• Already pregnant and want to know how many weeks you are today? Use the Pregnancy Week Calculator for gestational age and progress.
• Shopping for lingerie? Use the Bra Size Calculator to turn band and bust measurements into a size.
• Buying a ring as a gift or for yourself? Use the Ring Size Calculator to convert a measurement into US, UK, or EU sizes.

Why use Toolzent’s pregnancy & women tools?

Toolzent’s pregnancy and women calculators are built to be genuinely useful and trustworthy:

• 100% free with no sign-up or hidden paywall.
• Run privately in your browser, so the dates and measurements you enter stay on your device.
• Instant results the moment you enter your numbers.
• Mobile-friendly and fast on any screen.
• Standard methods with a worked example on each tool page. For instance, on a 28-day cycle the Due Date Calculator gives LMP + 280 days, and a band measurement of 79 cm with a 91 cm bust maps to a 36C in the Bra Size Calculator.

These tools support planning and awareness; they are calendar and sizing estimates, not a confirmation, a diagnosis, or a substitute for an ultrasound, a fitting, or professional care.

Explore related calculators in Date, Time & Age, Health & Medical, and Unit Converters.