Electricity Bill Calculator

Estimate your electricity bill from units used and your tariff, including slab (tiered) rates, fixed charges and tax.

Electricity used	350 kWh
Tariff (per-kWh rate, or slabs)	0+: 0.17
Fixed / standing charge per bill	$12
Taxes and duties	0 %

Electricity used

kWh

Tariff (per-kWh rate, or slabs)

Slabs as “from-to: rate”, the last as “from+: rate”. Take the rates from your bill or your supplier's tariff.

Fixed / standing charge per bill

Taxes and duties

Estimated bill

$71.50

350 kWh costs $59.50 for energy, plus $12.00 fixed charges and 0% tax. Average $0.20 per kWh.

Energy charge in each slab

0+ kWh: 350 units at $0.17$59.50

How the bill adds up

Energy$59.50
Fixed charges+$12
Bill$71.50

About the Electricity Bill Calculator

Many utilities, including most Indian state boards, charge in slabs: the first block of units at a low rate and later units at higher rates. Others charge one rate per kWh plus a daily standing charge.

Rates differ by state, supplier and plan, so enter the tariff from your bill or your supplier's website for an accurate estimate.

The formula

Bill = Σ(units in each slab × slab rate) + fixed charges, plus tax

Worked example

Example: Estimated bill = $79.30

Inputs: Electricity used: 390 kWh; Tariff (per-kWh rate, or slabs): 0+: 0.17; Fixed / standing charge per bill: $13; Taxes and duties: 0%.
Formula: Bill = Σ(units in each slab × slab rate) + fixed charges, plus tax
Result: Estimated bill = $79.30

Questions people ask

How do I find my units?

Subtract the previous meter reading from the current one, or read “units consumed” on your bill.

What uses the most electricity?

Heating and cooling, water heating, and older fridges are usually the biggest.