Electricity Bill Calculator — Estimate Your Monthly Cost
Estimate your electricity bill from appliance wattage, daily usage hours, and your per-unit rate.
About This Calculator
Calculates total energy consumption in kWh (units) and estimated cost from an appliance or total load wattage, hours used per day, and your electricity rate per unit.
About This Calculator
Calculates total energy consumption in kWh (units) and estimated cost from an appliance or total load wattage, hours used per day, and your electricity rate per unit.
Frequently Asked Questions
How do I calculate my electricity bill from watts?
Convert watts to kilowatts (divide by 1000), multiply by hours used per day and days per month to get total kWh (units) consumed, then multiply by your rate per unit. This calculator does that automatically.
What is a "unit" on my electricity bill?
One unit = one kilowatt-hour (kWh) — the energy used by a 1,000-watt load running for 1 hour. Your utility bills you per unit consumed.
Does this include taxes or fixed charges?
No — this estimates the energy cost only (units × rate). Most electricity bills also include fixed charges, taxes, and slab-based rate changes at higher usage, which this calculator does not model. Use it as an estimate, not an exact bill prediction.
Is this electricity bill calculator free to use?
Yes — it is completely free to use online, with no sign-up required.