Pregnancy Calculators
Calculate your due date, ovulation window, trimester, healthy weight gain, labor progress and baby growth instantly with our free online pregnancy calculators.
Plan With Confidence
Fast • Accurate • Free • Mobile Friendly
Calculators
Categories
Monthly Uses
Available
Find Your Pregnancy Calculator
Browse by Category
⭐ Popular Pregnancy Calculators
8+ CalculatorsDue Date Calculator
Estimate your baby's due date from your last menstrual period.
Ovulation Calculator
Estimate your ovulation date and fertile window.
Pregnancy Weight Gain Calculator
Track healthy weight gain recommendations by trimester.
Conception Date Calculator
Estimate the date your baby was conceived.
Trimester Calculator
Find out which trimester you're in based on your due date.
Contraction Timer Calculator
Time contractions to track labor progress.
Baby Growth Percentile Calculator
Calculate your baby's growth percentile for weight, length and head size.
Maternity Leave Calculator
Plan your maternity leave start and end dates around your due date.
📅 Due Date & Conception
10+ CalculatorsDue Date Calculator
Estimate your baby's due date from your last menstrual period.
Conception Date Calculator
Estimate the date your baby was conceived.
IVF Due Date Calculator
Estimate your due date based on IVF embryo transfer date.
Ultrasound Due Date Calculator
Estimate your due date based on an ultrasound measurement.
Gestational Age Calculator
Calculate how many weeks and days pregnant you are.
Days Since Conception Calculator
Count the number of days since conception.
Due Date Countdown Calculator
Count down the days remaining until your due date.
Twin Pregnancy Due Date Calculator
Estimate an adjusted due date for a twin pregnancy.
Pregnancy Weeks to Months Calculator
Convert your pregnancy week into a month and trimester.
Pregnancy Calendar Calculator
Build a week-by-week calendar for your entire pregnancy.
🗓️ Trimester & Milestones
9+ CalculatorsTrimester Calculator
Find out which trimester you're in based on your due date.
Fetal Development Milestone Calculator
See key developmental milestones for your current pregnancy week.
Viability Milestone Calculator
Track weeks until your pregnancy reaches medical viability.
Anatomy Scan Timing Calculator
Calculate the recommended window for your anatomy ultrasound.
Glucose Test Timing Calculator
Calculate the recommended window for your glucose screening test.
Kick Count Calculator
Track and time your baby's movements during kick counts.
Braxton Hicks Frequency Calculator
Track the frequency of Braxton Hicks practice contractions.
Fundal Height Calculator
Compare your fundal height measurement to your gestational age.
Amniotic Fluid Index Calculator
Calculate a total amniotic fluid index from four quadrant measurements.
⚖️ Weight & Nutrition
9+ CalculatorsPregnancy Weight Gain Calculator
Track healthy weight gain recommendations by trimester.
Pregnancy BMI Calculator
Calculate your pre-pregnancy BMI to guide weight gain targets.
Pregnancy Calorie Calculator
Estimate your daily calorie needs during pregnancy.
Folic Acid Dosage Calculator
Estimate recommended daily folic acid intake during pregnancy.
Pregnancy Water Intake Calculator
Calculate your recommended daily water intake during pregnancy.
Pregnancy Protein Intake Calculator
Calculate your recommended daily protein intake during pregnancy.
Iron Intake Calculator
Estimate recommended daily iron intake during pregnancy.
Prenatal Vitamin Timing Calculator
Plan the best time of day to take your prenatal vitamins.
Gestational Diabetes Risk Calculator
Estimate your risk factors for developing gestational diabetes.
🥚 Ovulation & Fertility
9+ CalculatorsOvulation Calculator
Estimate your ovulation date and fertile window.
Fertile Window Calculator
Calculate the days you're most likely to conceive each cycle.
Basal Body Temperature Calculator
Track basal body temperature shifts to confirm ovulation.
Cycle Length Calculator
Calculate your average menstrual cycle length.
Implantation Date Calculator
Estimate the likely date of embryo implantation.
Chances of Conception Calculator
Estimate your monthly chances of conception based on cycle timing.
Egg Freezing Age Calculator
Estimate how age affects egg freezing success rates.
IVF Cycle Timing Calculator
Plan key dates across an IVF treatment cycle.
Luteal Phase Calculator
Calculate the length of your luteal phase from your cycle data.
🏥 Labor & Postpartum
9+ CalculatorsContraction Timer Calculator
Time contractions to track labor progress.
Labor Progress Calculator
Estimate labor progress based on cervical dilation over time.
Epidural Timing Calculator
Estimate a typical window for requesting an epidural during labor.
Postpartum Recovery Calculator
Estimate a general recovery timeline after childbirth.
Breastfeeding Calorie Calculator
Estimate additional daily calories needed while breastfeeding.
Postpartum Bleeding Duration Calculator
Track typical postpartum bleeding duration by week.
C-Section Recovery Calculator
Estimate a general recovery timeline after a C-section.
Newborn Feeding Schedule Calculator
Plan a feeding schedule based on your newborn's age.
Postpartum Weight Loss Calculator
Estimate a healthy postpartum weight loss timeline.
👶 Baby Growth & Planning
10+ CalculatorsBaby Growth Percentile Calculator
Calculate your baby's growth percentile for weight, length and head size.
Nursery Budget Calculator
Plan a budget for setting up your baby's nursery.
Maternity Leave Calculator
Plan your maternity leave start and end dates around your due date.
Baby First Year Cost Calculator
Estimate the total cost of your baby's first year.
Diaper Usage Calculator
Estimate how many diapers you'll need per week and month.
Baby Sleep Schedule Calculator
Estimate a typical sleep schedule based on your baby's age.
Car Seat Size Calculator
Determine the right car seat stage for your baby's age and weight.
Formula Feeding Cost Calculator
Estimate the monthly cost of formula feeding your baby.
Pediatrician Visit Schedule Calculator
Plan your baby's recommended well-visit schedule.
Birth Plan Timeline Calculator
Plan key milestones and to-dos leading up to your due date.
Why Use Our Pregnancy Calculators?
Whether you're trying to conceive, expecting, or navigating postpartum recovery, our pregnancy calculators provide fast, accurate and reliable estimates in seconds.
Instant Results
Get accurate pregnancy and baby milestone estimates without manual math.
High Accuracy
Reliable formulas based on standard obstetric guidelines.
Mobile Friendly
Use every calculator smoothly on desktop, tablet and mobile.
Completely Free
Unlimited calculations with no registration required.
How to Use a Pregnancy Calculator
Follow these simple steps for quick and accurate results.
Choose Calculator
Select the pregnancy calculator you need from the category list.
Enter Your Dates
Type in your last period, conception date or cycle details.
Add Details
Include weight, measurements or cycle length where relevant.
Get Result
Instantly view your personalized pregnancy estimate.
Common Uses of Pregnancy Calculators
📅 Due Date Planning
Estimate your due date, conception date and gestational age.
🥚 Trying to Conceive
Track ovulation, fertile windows and cycle timing.
🗓️ Pregnancy Milestones
Follow trimester progress and key developmental milestones.
⚖️ Weight & Nutrition
Track healthy weight gain, calories and nutrient needs.
🏥 Labor & Recovery
Time contractions and plan postpartum recovery.
👶 Baby Planning
Budget for baby costs and plan maternity leave.
Frequently Asked Questions
Answers to the most common questions about pregnancy calculators.
What is a pregnancy calculator?
A pregnancy calculator estimates a date or milestone, such as your due date, ovulation window or trimester, using standard obstetric formulas based on the information you provide.
Are these pregnancy calculators accurate?
Our calculators use widely accepted obstetric formulas to provide reliable estimates, but every pregnancy is different. Always confirm dates and milestones with your doctor or midwife.
Can I use these calculators on mobile devices?
Absolutely. Every calculator is fully responsive and works smoothly on smartphones, tablets and desktop computers.
Are these pregnancy tools free?
Yes. All pregnancy calculators on Calculations.one are completely free to use without registration.
Which pregnancy calculator categories are available?
We offer calculators for due date and conception, trimester and milestones, weight and nutrition, ovulation and fertility, labor and postpartum, and baby growth and planning.
How often are new pregnancy calculators added?
We regularly expand our collection by adding new pregnancy calculators and improving existing tools.
Plan Every Step of Your Pregnancy
Explore our growing collection of professional pregnancy calculators designed for expecting parents, families and healthcare planning.