Electricity Units Converter
Enter your appliance's watts and daily usage hours to find out how many units (kWh) it consumes and what that costs per month. You can also work backwards: see how long your saved units will run an appliance.
A. Units and Cost from Appliance
B. How Long Will an Appliance Run on Your Units?
How to use
- Card A: Enter the appliance watts, daily hours and days, set the per-unit rate, then press Calculate — you will get total units (kWh) and estimated cost.
- Card B: If you have fixed units (for example on UPS / solar), enter the units and appliance watts — you will see how many hours the appliance can run.
- Formula: Units (kWh) = Watts × Hours × Days ÷ 1000. Cost = Units × Per-Unit Rate.
Good to know
- One unit of electricity equals one kilowatt-hour (kWh).
- An LED bulb uses far less power than an old incandescent bulb.
- Appliances on standby still draw power — switch them off at the socket.
- Check the nameplate on an appliance for its real wattage.
Note: This is only an estimate. The actual bill depends on slabs, taxes, fuel adjustment and meter reading.
Frequently Asked Questions (FAQ)
What does this electricity units converter do?
It converts appliance watts and usage hours into electricity units (kWh) with an estimated cost, and can also find how long an appliance can run on given units.
How are the units and the cost calculated?
Units (kWh) = Watts x Hours x Days / 1000. Cost = Units x per-unit rate. For example, a 100W fan used 10 hours a day for 30 days uses 30 units.
What is the how-long-will-it-run mode?
Enter a fixed number of units and an appliance wattage, and the tool shows how many hours the appliance can run on those units — handy when you are limited by UPS or solar backup.
Can I change the per-unit rate?
Yes. The per-unit rate is editable, so set it to the rate on your own electricity bill for an accurate cost estimate.