Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Amount pumping saves vs. formula (year 1)
$898
Formula cost — year 1
$2,248
Pumping cost — year 1
$1,350
Formula cost per month
$187
Pumping cost per month
$113
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How to use this
- 1Enter average daily formula ounces (by month 6+) (oz).
- 2Enter formula price per ounce mixed ($).
- 3Enter breast pump + initial accessories ($).
- 4Enter storage bags/bottles cost per month ($).
- 5Enter extra food cost per month (lactation) ($).
- 6Enter lactation consultant visits total ($).
- 7Read your amount pumping saves vs. formula (year 1) on the right — it updates as you type.
- 8Hit Share to keep the scenario or send it to someone.
About this calculator
Breastfeeding isn't free — pump, bottles, storage bags, extra calories, and lactation consultant visits all cost money, they're just spread differently than a formula bill. This calculator compares formula cost (based on daily ounces and price per ounce) against the equipment and consumable costs of exclusive pumping over the first year, so you can see the real dollar gap rather than assuming breastfeeding costs zero. It intentionally excludes the value of parental time, which is real but highly variable by household.
Worked example
Using the values the calculator loads with:
Inputs
- Average daily formula ounces (by month 6+): 28 oz
- Formula price per ounce mixed: 0.22 $
- Breast pump + initial accessories: 300 $
- Storage bags/bottles cost per month: 15 $
- Extra food cost per month (lactation): 60 $
- Lactation consultant visits total: 150 $
Results
- Amount pumping saves vs. formula (year 1): $898
- Formula cost — year 1: $2,248
- Pumping cost — year 1: $1,350
- Formula cost per month: $187
- Pumping cost per month: $113
What each field means
Inputs
- Average daily formula ounces (by month 6+) (oz)
- The average daily formula ounces (by month 6+) used in the calculation, measured in oz. Starts at 28 oz so you have a working example on load. Accepted range: 10–40 oz.
- Formula price per ounce mixed ($)
- The formula price per ounce mixed used in the calculation, measured in $. Starts at 0.22 $ so you have a working example on load. Accepted range: 0.05–0.6 $.
- Breast pump + initial accessories ($)
- The breast pump + initial accessories used in the calculation, measured in $. Starts at 300 $ so you have a working example on load.
- Storage bags/bottles cost per month ($)
- The storage bags/bottles cost per month used in the calculation, measured in $. Starts at 15 $ so you have a working example on load.
- Extra food cost per month (lactation) ($)
- The extra food cost per month (lactation) used in the calculation, measured in $. Starts at 60 $ so you have a working example on load.
- Lactation consultant visits total ($)
- The lactation consultant visits total used in the calculation, measured in $. Starts at 150 $ so you have a working example on load.
Results
- Amount pumping saves vs. formula (year 1)
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Formula cost — year 1
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Pumping cost — year 1
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Formula cost per month
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Pumping cost per month
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Is formula really this expensive?
Standard powdered formula runs about $0.15-0.25 per ounce mixed; specialty formulas (hypoallergenic, sensitive, organic) can run $0.35-0.60+ per ounce, which more than doubles the annual cost. A baby drinking 28-32 oz/day on standard formula typically costs $1,500-2,200 in the first year.
Does insurance cover a breast pump?
Under the ACA, most insurance plans must cover a breast pump at no cost, either a manual or standard electric pump, though upgraded 'hospital-grade' or wearable pumps may require an out-of-pocket difference. Check your plan's DME (durable medical equipment) benefit and order through an approved supplier before or right after birth.
What about combo feeding?
Run this calculator twice at partial percentages — for example, half the daily ounces from formula and half from pumping — and add the two partial results together. Most families end up doing some mix, and the cost comparison scales roughly linearly with the split.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Formula vs. Breastfeeding Cost Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/formula-vs-breastfeeding-cost
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/formula-vs-breastfeeding-cost" target="_blank" rel="noopener">Formula vs. Breastfeeding Cost Calculator — RevenueLab</a> (2026).</p>
Source: [Formula vs. Breastfeeding Cost Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/formula-vs-breastfeeding-cost) (2026).