Baby bottle warmer vs. breast pump: running cost
A breast pump is cheaper to run: about $1 a year versus $14 for a baby bottle warmer at typical use and 17.99¢/kWh, a $13 difference.
| Baby bottle warmer | Breast pump | |
|---|---|---|
| Typical watts | 400 W | 10 W |
| Watt range | 200–600 W | 5–20 W |
| Typical use | 30 minutes a day | 1.5 hours a day |
| Energy per year | 77 kWh | 5 kWh |
| Cost per hour | 7.2¢ | 0.2¢ |
| Cost per day | 3.8¢ | 0.3¢ |
| Cost per month | $1.16 | $0.08 |
| Cost per year | $14 | $1 |
| Per year in Hawaii (43.51¢) | $34 | $2 |
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What drives the difference
- Baby bottle warmer: Bottle warmers draw 200-600 W for 3-5 minutes per bottle; six bottles a day is about 70 kWh a year.
- Breast pump: Electric breast pumps draw 5-15 W; even with heavy use the annual cost is under $3.
Ways to cut either cost
Manual breast pump
No electricity, useful for occasional sessions.
See options on Amazon Portable bottle warmer
Smaller heaters warm one bottle with less energy.
See options on AmazonWe may earn a commission from qualifying purchases. It never changes the numbers we show. Disclosure.
Frequently asked questions
Which costs more to run, a baby bottle warmer or a breast pump?
At typical use and the U.S. average rate (17.99¢/kWh), a baby bottle warmer costs about $14 a year versus $1 for a breast pump. That's $13 more, or 14.1× as much.
How many watts do baby bottle warmer and breast pump use?
A baby bottle warmer typically draws 400 W (range 200–600 W). A breast pump draws 10 W (range 5–20 W). Watts alone don't decide cost. Hours of use, cycling and standby matter just as much.
Rates: EIA, 12 months ending 2026-07. Methodology.