What is the running cost per hour for a 100 watt appliance? — Bulb Community

# What is the running cost per hour for a 100 watt appliance?

edited November 2018
Hi what is the running cost per hour for a 100 watt appliance

• jenseph said:

Hi what is the running cost per hour for a 100 watt appliance

Gas or electric appliance?
• edited November 2018
jenseph said:

Hi what is the running cost per hour for a 100 watt appliance

Assuming electric, since there's unlikely to be any gas appliances rated at 100 Watts ...

0.1 kW for 1 hour = 0.1*1 = 0.1 kWh
0.2 kW for 1 hour = 0.2*1 = 0.2 kWh
0.1 kW for 2 hour = 0.1 * 2 = 0.2 kWh
0.2 kW for 0.5 hour= 0.2 * 0.5 = 0.1kWh

At, say, 13p per kWh, the cost is 0.1 * 13 = 1.3p
• Allanr said:

jenseph said:

Hi what is the running cost per hour for a 100 watt appliance

Gas or electric appliance?
electric towel rail
• For 100w device it will be one tenth of the cost of one kilowatt.
• marview said:

For 100w device it will be one tenth of the cost of one kilowatt.

How much does 1 kW cost? Given that it's a unit of power and not a unit of energy.
• Just a for the sake of an explanation.

The supply of energy is charged on the basis for every 1 kilowatt of power (1000 watts) or 1 unit.

Luckily electricity is supplied in measured in watts, and thus if an appliance uses 100 watts an hour, then calculations as the above describe as (100 watts/1000 watts) * unit rate = cost per hour

for gas it is measured in cubic feet (cft)or cubic meters (cm), and there is a little conversation need to get 1 kilowatt or 1 unit. and the conversation rate from cft or cm is dependent on many factors, however, typically for every:

1 cft = 31.6586 Watts
1 cm = 11.1868 watts
• The supply of energy is charged on the basis for every 1 kilowatt of power (1000 watts) or 1 unit.

Luckily electricity is supplied in measured in watts, and thus if an appliance uses 100 watts an hour, then calculations as the above describe as (100 watts/1000 watts) * unit rate = cost per hour

At the risk of being pedantic, you're confusing energy and power.

Power = Kilowatt (kW)
Energy = Kilowatt-hour (kWh)

There is no such thing as energy "for every 1 kilowatt of power" and it makes no sense to say "if an appliance uses 100 watts an hour".

The correct answer is what I posted above and everything else so far has been wrong.

Your calculation is correctly written with units:

(100 Watts * 1 hour) = 100 Wh

100Wh / 1000 = 0.1 kWh

0.1 kWh * (pence/kWh) = pence
• Hooloovoo said:

The supply of energy is charged on the basis for every 1 kilowatt of power (1000 watts) or 1 unit.

Luckily electricity is supplied in measured in watts, and thus if an appliance uses 100 watts an hour, then calculations as the above describe as (100 watts/1000 watts) * unit rate = cost per hour

At the risk of being pedantic, you're confusing energy and power.

Power = Kilowatt (kW)
Energy = Kilowatt-hour (kWh)

There is no such thing as energy "for every 1 kilowatt of power" and it makes no sense to say "if an appliance uses 100 watts an hour".

The correct answer is what I posted above and everything else so far has been wrong.

Your calculation is correctly written with units:

(100 Watts * 1 hour) = 100 Wh

100Wh / 1000 = 0.1 kWh

0.1 kWh * (pence/kWh) = pence
I never said anything like that, I said that energy is charged per kilowatt per hour not that KW is a form of measurement . And i clearly provide the same explanation as you, so i think your just wasting everyone time.
• edited November 2018

I never said anything like that, I said that energy is charged per kilowatt per hour not that KW is a form of measurement.

You said "electricity is supplied in [sic] measured in watts". That's wrong.

You've now said " energy is charged kilowatt per hour". That's also wrong.

It's not kilowatt per hour (kW/hour). It's kilowatt-hour (kW*hour). They are very different things! It's essential to understand the correct units in order to correctly calculate cost.

Likewise "1 cft = 31.6586 Watts, 1 cm = 11.1868 watts". This is kWh. Not just watts. Wrong units and wrong order of magnitude. Plus you failed to mention that 1 imperial gas unit it typically 100s of cubic feet, not 1 cubic foot.

And i clearly provide the same explanation as you, so i think your just wasting everyone time.

Only by luck rather than intention! If the OP had asked how must it cost to run for 2 hours, then your calculation wouldn't work because at no point do you include time in your equation. So your answer is "just wasting everyone [sic] time".
• stop it !! I asked a question about a 100w towel rail and have got my answer, so please stop arguing
• jenseph said:

...so please stop arguing 