On Fri, 25 Sep 2009 19:02:13 +0100, wrote:
On 25 Sep,
Pete Brown wrote:

I am looking for an approximate figure.

I don't need it accurate to three significant digits. Within 50% or
100% is good enough to give me an idea of cost so I can compare it to
the microwave.

For the first 10 minutes or so it will be working at full rate.

Well, an electric oven is rated at about 3kW, so I would expect a gas
oven to provide roughly the same amount of energy. Check what your
supply charges per kW*Hr and then work it out for the time (10 mins, as
above or maybe 20 for a ballpark figure) or however long it takes until
the thermostat turns down the heat.
I'd reckon, mebbee 1kW*Hr to get up to 200 Celcius ~ say about 10p.

Why not look up the rating in the handbook and calculate from there? You
should have the handbook and service manual if it was (correctly) installed
and commissioned by a corgi (now gas safe).

I'm sure plenty here can do the calcs if you can't.