Diaper Calculator

Our calculator uses data provided by the CDC's Baby Growth Charts and the diaper manufacturer's sizing and usage charts. CDC data is based on the average growth rate of a child.

However, not all children are the same. Please use the data provided as a general estimate to help you plan your diaper purchases.

Disposable Diaper Calculator Refresh

Add your baby's age & weight to calculate the number of diapers you will need during your first year. If you're still pregnant, please estimate your baby's weight.

Age:

Select Age0 month0.5 month1 month1.5 months2 months2.5 months3 months3.5 months4 months4.5 months5 months5.5 months6 months6.5 months7 months7.5 months8 months8.5 months9 months9.5 months10 months10.5 months11 months11.5 months12 months12.5 months13 months13.5 months14 months14.5 months15 months15.5 months16 months16.5 months17 months17.5 months18 months18.5 months19 months19.5 months20 months20.5 months21 months21.5 months22 months22.5 months23 months23.5 months24 months24.5 months25 months25.5 months26 months26.5 months27 months27.5 months28 months28.5 months29 months29.5 months30 months30.5 months31 months31.5 months32 months32.5 months33 months33.5 months34 months34.5 months35 months35.5 months36 months

Enter birthday instead

Weight:

Select Age First Estimate baby's weight

Calculate

How many diapers per day?

0-3 MONTHS	10
3-6 MONTHS	8-10
6-9 MONTHS	6-8
9-12 MONTHS	6-7
12-18 MONTHS	5-6
18-36 MONTHS	4

Diaper usage is based on your baby's age. The younger your baby. the more diapers will be used per day.

What size diaper to choose?

SIZE NB	UP TO 10 LBS
SIZE 1	8 - 14 LBS
SIZE 2	12 - 18 LBS
SIZE 3	16 - 28 LBS
SIZE 4	22 - 37 LBS
SIZE 5	OVER 27 LBS
SIZE 6	OVER 35 LBS

Diaper sizes are based on your baby's weight.

HERE ARE YOUR RESULTS

Print your results

Here's a helpful chart of expected weight gain over the next 6 months. Hover over the chart for more details.

Amazing Savings For New & Expecting Parents

Select Birthdate

Cancel

How Many Diapers Do You Need And What Size?

Welcome to our free and easy to use Diaper Calculator. This diaper calculator will help you estimate:

1. How many diapers your baby needs,
2. What size diaper per stage is expected from birth until potty training,
3. Your total diaper costs, and
4. A detailed price comparison between the most popular diaper brands.

Diapering can get complicated, which is why moms and dads have so many questions. These are just a few commonly asked diaper questions from regular moms, like you:

• How many newborn diapers do I need? / How many diapers do I need?
• What diaper size do I need?
• How many diapers per day?
• When to go up a size in diapers?
• How much do diapers cost?
• How many diapers does a baby use in a year?

 The diaper calculator will help you answer these, and other questions you may have.

The calculator is easy to use. Simply add your baby’s details, and the diaper calculator will offer estimates based on CDC data and big brand diaper companies, like Pampers and Huggies.

If you have further questions, or you have found a glitch in our calculator, please let us know. We are continually tweaking it to make sure it is an accurate and helpful tool for moms and dads.