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Appliance running cost calculator

Estimate what an appliance costs to run per day, month and year.

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Need Daily cost, Monthly cost, Yearly cost? The Appliance running cost calculator derives it from Power (W), Hours per day, Price per kWh in one step. For instance, with Power (W) = 2,000, Hours per day = 3 and Price per kWh = $0.20 it returns Daily cost = $1.20, Monthly cost = $36.00 and Yearly cost = $438.00.

How to use it

  1. Enter your values: Power (W), Hours per day, Price per kWh.
  2. Read the result instantly: Daily cost, Monthly cost, Yearly cost.

Frequently asked questions

How does the Appliance running cost calculator work?

It takes Power (W), Hours per day and Price per kWh and derives Daily cost, Monthly cost and Yearly cost from them. The calculation is live as you type, so the result updates on every change.

Which values does the calculator ask for?

3 values: Power (W), Hours per day and Price per kWh ($). Nothing else is required — no account, no file upload.

What does a typical calculation look like?

With Power (W) = 2,000, Hours per day = 3 and Price per kWh = $0.20, the calculator returns Daily cost = $1.20, Monthly cost = $36.00 and Yearly cost = $438.00. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

How much does the result change with different inputs?

It moves a lot. Using Power (W) = 4,000, Hours per day = 6 and Price per kWh = $0.40 instead, Daily cost goes from $1.20 to $9.60 — which is why it is worth testing a few scenarios rather than trusting a single figure.

What does it give for smaller values?

Scaled down to Power (W) = 1,000, Hours per day = 1.5 and Price per kWh = $0.10, Daily cost comes out at $0.15. The relationship is worth checking at both ends before you rely on a single result.

When would I actually use this?

Putting a number on a bill: what an appliance costs to run, whether a solar array covers the load, and how much heating a room actually needs.

What is the most common mistake?

Confusing power with energy. A kilowatt is a rate and a kilowatt-hour is a quantity; a 2 kW heater on for half an hour uses 1 kWh, and only the second figure appears on a bill.

What is the difference between the Appliance running cost calculator and the Appliance Energy Cost Calculator?

This one returns Daily cost and Monthly cost; the Appliance Energy Cost Calculator returns Result. That is the whole difference — open the one whose figure you need.

Is there a tool for the next step?

Heat pump savings calculator is the closest one after this: What a heat pump costs to run against your current boiler, from your own fuel bill: the heat you actually need, the electricity a given SCOP would draw, the yearly difference and the payback. Plus the one number that decides it — the electricity price above which the heat pump stops being cheaper.

What else is worth having open alongside it?

Solar battery size calculator and Solar panel calculator — they come up in the same task often enough to be worth a second tab.

Further reading

All guides →
How-toHow Much Does a Space Heater Cost to Run?Multiply the heater's kilowatts by hours used and your price per kWh — a 1.5 kW heater for 5 hours a day adds up fast at typical tariffs.How-toHow Much Does an Appliance Cost to Run? A Simple MethodTurn an appliance's wattage and daily hours into an annual running cost using one formula: power times hours times your price per kWh.How-toHow to Estimate the Running Costs of a HomeAdd up energy, water, heating, and maintenance with simple rules of thumb so you know what a home really costs to run each month.How-toHow Many Amps Does an Appliance Draw?Divide the appliance wattage by the supply voltage to get the current in amps — the number that decides breaker size, wire, and what can share a circuit.How-toWhat Wire Gauge Do I Need?Pick wire size from the load current, run length, and allowed voltage drop — the amps decide the minimum cross-section, distance forces you thicker.How-toWhat Size Water Heater Do I Need?Match tank size to household size and peak-hour demand: roughly 40–50 gallons for two people, more as bathrooms and simultaneous use grow.