Baby and Parenting Calculators
Diaper cost.
Enter the price and count of a pack and how many diapers you use a day. See the cost per diaper, month and year, how long a pack lasts, and compare a second pack side by side. Runs in your browser; nothing is sent or stored.
Your numbers
Result
Fill the form and press Calculate.
Not medical advice. This is a budgeting tool. Unusually few or many wet diapers can be a health sign; ask your doctor or public health nurse if you are worried.
Worked example
$36 for 144 diapers is $0.25 each. At 8 a day that is $2.00 a day, $60.88 a month and $730.50 a year, with a pack lasting 18 days. A $30 pack of 144 would be $0.21 each and save about $10.15 a month.
How it works
Cost per diaper = (pack price + tax) / diapers in the pack. Per day = cost per diaper x diapers per day. A month is 365.25 / 12 = 30.44 days and a year is 365.25 days. The comparison runs the same maths on the second pack at the same diapers per day and shows which is cheaper per diaper and the saving per month and over the period.
Sources and basis: arithmetic on the numbers you enter. Prices and diaper counts are yours; nothing is looked up.
FAQ
How much do diapers cost per month?
Multiply cost per diaper by diapers per day by 30.44. At $0.25 each and 8 a day that is about $61 a month.
How many diapers a day should I budget for?
Use your own count. Count a typical day, since it changes as your baby grows, and enter it here.
How do I compare two packs?
Enter the second pack’s price and count. The calculator shows cost per diaper for both and the monthly and total saving.
Does it include wipes?
No. It covers diapers only. Add wipes as a separate line in your budget.
Why include tax?
Some places charge tax on diapers and some do not. Enter your rate if your receipt shows it.