What is the kWh to Cost Calculator?
This tool turns electricity consumption into money. Electricity is billed in kilowatt-hours (kWh) — one kWh is the energy used by a 1,000-watt appliance running for one hour. By multiplying the kWh you consume by your utility's price per kWh, you get the exact cost of running an appliance, a room, or your whole home.
How to use it
Choose one of two modes. If you already know the energy used (for example from a meter reading or appliance label), select "Enter kWh directly" and type the figure. If you only know an appliance's power rating and how long it runs, select "Calculate from watts & hours" and enter both — the calculator converts them to kWh for you. Finally enter your price per kWh (check your electricity bill) and read the cost instantly.
The formula explained
The core equation is simply $$\text{Cost} = \text{kWh} \times \text{Price per kWh}$$ When you start from a device, kWh is first derived with $$\text{kWh} = \frac{\text{Watts} \times \text{Hours}}{1000}$$ Dividing by 1000 converts watt-hours into kilowatt-hours, the unit your meter and bill use.
Worked example
Suppose a 1,500 W space heater runs for 4 hours and electricity costs $0.20 per kWh. Energy used $$= \frac{1500 \times 4}{1000} = 6 \text{ kWh}$$ Cost $$= 6 \times 0.20 = \$1.20$$ Run it daily for a month and that becomes about $36.
FAQ
Where do I find my price per kWh? It is listed on your electricity bill, often as "rate" or "unit price". Divide total energy charges by total kWh if it is not stated directly.
Does this include standing charges or taxes? No — it estimates only the variable energy cost. Add any fixed daily charges separately.
What currency does it use? The result is in whatever currency your price per kWh is entered in, so it works anywhere.
