Electricity Bill Calculator
Estimate your monthly electricity bill from meter readings or units consumed. Free online electricity bill calculator with fixed charges.
Units = Current − Previous
1350 − 1000 = 350 kWh
Energy Charge = Units × Rate
350 × 6.5 = ₹2275.00
Total Bill
₹2,325
$28.01 · 350 units consumed
Units Consumed
350.00 kWh
Energy Charge (₹)
₹2,275
Fixed Charge (₹)
₹50
Total Bill ($)
$28.01
Average Cost Per Unit (₹)
₹6.64
How Does the Electricity Bill Calculator Work?
Enter your previous and current meter readings. The units consumed equal the current reading minus the previous reading. Multiplying the units by your per-unit rate gives the energy charge, and adding the fixed charge gives the total bill. Many utilities use a slab tariff — a tiered rate where the first block of units costs less per kWh and higher blocks cost more, so the effective per-unit price can change as your consumption crosses each slab boundary.
Example
With a previous reading of 1000 kWh, a current reading of 1350 kWh, a rate of ₹6.5 per unit, and a fixed charge of ₹50, the bill is (1350 − 1000) = 350 units × ₹6.5 = ₹2,275 for energy, plus ₹50 fixed charge = ₹2,325.
Common Use Cases
- Estimating an upcoming electricity bill before the meter is read.
- Verifying that a billed amount matches the readings and tariff.
- Budgeting monthly utility expenses for homes and small businesses.
- Comparing tariff plans by calculating the cost at different usage levels.
FAQs
What is a slab tariff?
A slab tariff charges different rates per unit depending on total consumption. For example, the first 100 units may cost ₹4 each, while units beyond 100 cost ₹6.5 each. This calculator uses a single average rate, so enter your effective rate if your provider uses slabs.
Why is there a fixed charge?
Utilities charge a fixed amount to cover the cost of maintaining the connection, meter, and infrastructure, regardless of how much electricity you use. It appears on the bill even at zero consumption.
What if my current reading is lower than the previous one?
A lower reading usually means the meter was reset, replaced, or read incorrectly. This calculator clamps the units to zero when the current reading is lower, so you should verify the readings with your provider.