Just did some calculations through an energy calculator website

Incubator 25watt - 3 weeks - £1.80

Electric hen 50 watt - run constantly for 1 month - £3.60 approx

Energy saving light bulb 10watt - run for 12 hours per day for 1 month - £0.50

So as you can see it costs around £6.00 in electricity to incubate then brood a batch of chicks.
If you use a heat lamp at 250watts (£16.50 for  1 month)your costs will treble.

All figures  are approx and will vary depending upon amps rating of item and electricity cost. I based my figures on a cost of 12p per kwh and used the ampage of a kettle for the incubator and electric hen.

Hope this makes sense,

Marshall

Here is the link to try for yourself;

http://www.ukpower.co.uk/tools/running_costs_electricity/

After a previous bit of research on another thread i was prompted to do a bit of investigation into what it might actually cost to grow a bird from egg to hen.
I know the majority of us do this as a hobby but it is interesting to know how much your hobby costs and of course when you sell the odd bird, how much to charge for it.
Any figures i have used are of course averages based upon my experience. Food costs, food consumption and other things are variable depending upon the size of bird (bantam or large fowl) and how much you pay for your food. It also assumes that you have 20 pullets. I cull most roosters before 24 weeks and only keep a few so i could end up with 12 out of 20 birds.
I have calculated costs for raising 20 bantams of wyandotte/silkie size (this is what i am rearing at the moment)

Here goes;
Chick crumbs/Growers @ £7.50 per 25kg = 30p per 1kg

Incubation, light & electric hen electricity costs = £6 (deatiled on another thread)

0 - 3 weeks Feed @ half kg per day = 15p x 21 days = £3.15

4 - 8 weeks Feed @ 1 kg per day = 30p x 35 days = £10.50

9 - 24 weeks Feed @ 2 kg per day = 60p x 112 days = £67.20

Bedding 4 bales of shavings @ £8 per bale = £32


Other sundries (if required) Medication, Garlic, ACV, Vitamins etc.. = £10 (estimation/impossible to calculate)

Total costs = £128.85
Cost per bird = £128.85 / 20 = £6.44

Quite interesting, but i obviously do not take into account the set up costs of purchasing incubator, brooder, electric hen, housing etc... and the cost of purchasing your hatching eggs or keeping the poultry which supply your hatching eggs.