Diaper & Formula Cost Calculator
Free diaper and formula cost calculator. Estimate what diapers and formula cost per month and per year, and see how bulk buying and per-unit savings add up.
Estimate your baby costs
A rough planning estimate. Nothing is saved or sent. Tip: lowering price-per-diaper by a few cents adds up to hundreds a year.
What do diapers and formula really cost?
Newborns can go through 8–12 diapers a day, easing to 5–6 as they grow. At even 20–25 cents a diaper that's a real monthly line item — which is exactly why the per-diaper price (not the box price) matters. Buying the larger box almost always lowers the cost per diaper.
Formula adds up fast too. Enter your numbers above for a monthly and yearly estimate, then use our unit price calculator to find the cheapest box or tub per unit. New here? See our baby deals.
Frequently asked questions
How much do diapers cost per month?
Most families spend roughly $50–$80 a month on diapers in the early months (about 8–10 a day at ~20–30¢ each), dropping as the baby grows. Buying larger boxes and catching sales lowers the per-diaper price.
How much does formula cost per month?
Formula commonly runs $100–$300+ a month depending on the brand and how much baby eats. Comparing price-per-ounce across tub sizes is the best way to cut the cost.
Is bulk cheaper for diapers and formula?
Usually yes per unit, but not always — always check the price per diaper or per ounce before assuming the big box wins.