Quick answers about electricity bill calculation, units and kWh, appliance usage, and tips to lower your monthly bill.
Get quick answers about electricity bill calculation, units, AC usage, and tips to lower your monthly bill.
Multiply your total kWh (units) consumed by the rate per kWh for each tier, then add fixed charges, fuel surcharges, and taxes. Our calculator uses tiered pricing so the rate often rises as your usage crosses certain thresholds — giving you a more accurate estimate than a flat-rate tool.
1 unit of electricity equals exactly 1 kilowatt-hour (1 kWh). If you run a 1,000-watt appliance for 1 hour, you consume 1 unit (1 kWh) of electricity.
It depends on your AC's wattage and your local rate. A typical 1.5-ton AC uses about 1.2–1.5 kWh per hour. Multiply that by your utility's rate per kWh (e.g., $0.15) to get the hourly cost — roughly $0.18–$0.23 per hour of runtime.
No. A ceiling fan uses roughly 50–90 watts, while an air conditioner uses 1,000–3,500 watts. You'd need about 10–30 fans to match the power draw of a single AC — fans cost far less to run than air conditioning.
It varies by state and rate tier. At $0.15/kWh, 1,000 units costs about $150; at $0.30/kWh it's about $300. Check your utility's specific tiered rates — our calculator lets you enter your state for a precise estimate.
Yes, but it will add up. A 1.5-ton AC running 12 hours might use 14–18 kWh, which at $0.15/kWh costs roughly $2–$3 per night. Use a timer, set the thermostat a few degrees higher, and seal air leaks to reduce the cost.
Switch to LED lighting, unplug idle electronics, run full loads in dishwashers and washing machines, set your thermostat a few degrees higher in summer, use natural light during the day, and upgrade to energy-star appliances. Revisit our calculator monthly to track your savings.
The electric field is the force per unit charge, E = F/q, measured in newtons per coulomb (N/C) or volts per meter (V/m). For a point charge, E = kQ/r² where k is Coulomb's constant. In your home wiring, the electric field is what pushes electrons through conductors, creating the current your meter records in kilowatt-hours.
Your electric company reads your meter (in kWh) at the start and end of the billing cycle, subtracts the previous reading from the current one, and multiplies the difference by your rate per kWh. They then add fixed charges, taxes, fuel surcharges, and any other fees to arrive at your total bill. Our calculator does the same estimate using your state's tiered rates.
Electric potential is the work done per unit charge to move a charge between two points, V = W/q, measured in volts (V). For a point charge, V = kQ/r. The potential difference (voltage) between two points is what drives current through a circuit — standard household supply is typically 120 V in the US or 230 V in India.
Electric field strength is the force experienced per unit charge, E = F/q, or equivalently the voltage divided by distance, E = V/d. It's measured in volts per meter (V/m) or newtons per coulomb (N/C). A stronger field means a greater force on charges, which translates to more current flow and higher energy use.