What it actually costs to run an egg incubator

This page exists because nobody publishes the figure. Incubator makers publish wattage, electricity suppliers publish rates, and the multiplication in between is left to you. It is not a difficult multiplication, but the inputs are scattered across three places and two of the six machines on this site do not supply the first one.

So here is the whole thing, with every input named and sourced. If your electricity costs something different from the national average — and it almost certainly does — you can substitute your own rate and redo it in a line.

The three inputs

Hours. A chicken hatch is 21 days, published by Mississippi State University Extension, and an incubator runs continuously through all of it. That is 21 × 24 = 504 hours. There is no duty cycle to discount for, because although the heater cycles, the published “typical” wattage is already an average figure rather than a peak one.

Watts. From the maker’s own specification page. This is where the category splits in two. Brinsea publishes typical and maximum for every model. Manna Pro publishes nothing at all for the Nurture Right 360, and Farm Innovators publishes a single 40-watt rating for the 4250. For those two, the only defensible calculation is a ceiling.

Rate. 18.34 cents per kilowatt-hour, the US average residential price from the EIA Electric Power Monthly, Table 5.6.A. This is the same figure used everywhere else on this site, so the numbers here are directly comparable with the brooder running-cost arithmetic.

The arithmetic, one machine at a time

Run that for every machine on this site and the whole category fits in one table. The right-hand column is the one worth looking at: cost per egg the machine can hold, which is the closest thing to a fair comparison across very different capacities.

The last two rows are computed from the published 40-watt rating, held continuously. That is a ceiling and not an estimate: a thermostatically controlled machine does not sit at its rating, so the true figure is lower and we cannot say by how much. Publishing a ceiling and labeling it as one is the honest version of this row. The full incubator comparison goes through what else those two makers do and do not publish.

What the numbers actually tell you

Three things, and only one of them is about money.

First, running cost should not decide your purchase. The spread across this entire table is about two dollars and sixty cents. Any feature that improves your odds of a successful hatch — an alarm, an auto-stop, automatic humidity — is worth multiples of the entire lifetime electricity difference between these machines.

Second, the incubator is the cheap part of the stage. Compare it to what comes next: this site’s brooder arithmetic puts six weeks of brooding on a 12-watt heat plate at $2.22, and on a 250-watt heat lamp at $46.22. Hatching costs about what brooding on a plate costs. Brooding on a lamp costs twenty times either.

Third, a maker that publishes typical wattage has measured its own product. That is the real reason this page ranks Brinsea highly and it has nothing to do with electricity. Two of the six machines on this site cannot appear in the middle four rows of that table, and the reason is not that they draw more power — it is that nobody will say what they draw.

Doing it with your own rate

The national average hides an enormous spread. Substituting your own number takes one multiplication: find the published typical wattage, multiply by 504, divide by 1,000 to get kilowatt-hours, then multiply by your rate per kWh from your own bill.

For a 24-watt machine that is 12.10 kWh regardless of where you live. At 12 cents that is $1.45; at 30 cents it is $3.63. Even at the top of the US range, a full hatch costs less than a bag of chick starter. If somebody tells you incubation is expensive to run, they are describing something other than the electricity — most likely the machine, the eggs, or the brooder that has to be ready on day 21.