Electricity calculator
Turn your consumed units and an entered rate into a cost breakdown. This is a flat-rate budgeting tool: it does not calculate official state tariffs or subsidy eligibility.
Electricity rates in India vary by state, board, consumer category, slab, connected load, subsidy, fixed charge, and billing period. Hardcoding a rate can become wrong quickly, so this page lets you enter the rate from your latest bill or official tariff notice.
Energy charge = units × rate. Subtotal = energy charge + fixed charge. Tax = subtotal × entered percentage / 100. Estimated total = subtotal + tax. The tax field applies to the whole subtotal; if your actual duty uses another basis, leave it at zero and reconcile that line separately.
Using illustrative inputs of 250 kWh, INR 7.50 per kWh, INR 100 fixed charge and 5% tax: energy charge is 250 × 7.50 = INR 1,875; subtotal is INR 1,975; tax is INR 98.75; total is INR 2,073.75. These are example numbers, not a tariff recommendation.
A 1,000 W appliance running for 2 hours a day over 30 days uses 1 × 2 × 30 = 60 kWh. At an illustrative INR 7.50 per kWh, its energy cost is INR 450. Use zero fixed charge and tax when comparing energy alone so you do not charge the same household fixed fee twice. Actual cycling appliances do not necessarily draw rated power continuously.
Suppose an illustrative tariff charges the first 100 units at INR 4 and the next 150 at INR 6. Energy cost is (100 × 4) + (150 × 6) = INR 1,300. Enter the average energy rate, 1,300 / 250 = INR 5.20, for that bill. Do not use total payable / units as the energy rate and then add fixed charges again. The average changes when consumption crosses a slab, so it cannot reliably predict a different month.
Take kWh and the billing period from your meter bill. Compare like-for-like periods; do not compare a two-month bill with one month of usage. Separate energy charge from fixed charges, arrears, credits, fuel adjustments and taxes. This tool does not automatically include those extra lines.
Your provider may apply slabs, minimum charges, time-of-use rates, sanctioned-load charges or conditional subsidies. This page does not store state-specific tariff tables. For exact amounts or a dispute, use the tariff order and customer portal of the distribution company printed on your bill.
This page deliberately avoids fixed tariff tables because electricity rates, slabs, subsidies, taxes, and distribution-company rules change. The source of truth is the latest bill, official tariff order, or customer portal; the calculator performs only the arithmetic on the values you enter. See the editorial standards and site disclaimer for the limits of these tools and how to report a problem.
No. It avoids hardcoded state slabs because tariffs change and vary by category. Enter your current rate manually.
One unit is usually one kilowatt-hour, or 1 kWh.
Check the consumption or units line on your electricity bill.
Many bills include fixed or demand charges in addition to per-unit energy charges.
Yes. First estimate AC kWh usage, then enter those units and your tariff rate.
No. It is a planning estimate for comparison and budgeting.
A meter reading is normally cumulative. If the previous reading is 8,120 and the current reading is 8,370, the difference is 250 units for the interval. Enter that difference, not the current reading, in the units field. For a flat illustrative rate of 7.50 per unit, the energy charge is 1,875. With a fixed charge of 100 and zero percentage tax in the form, the estimated total becomes 1,975. Those numbers are examples; obtain the rates and charges from your actual bill.
The billing interval matters when comparing months. A 35-day interval can use more units than a 28-day interval even if daily usage stays similar. To investigate consumption, divide each interval's units by its days. To investigate the payment, inspect the bill's actual charge lines. Combining these questions can lead you to blame a tariff change for a longer reading period or blame an appliance for a fixed-charge change.
Suppose a hypothetical tariff charges the first 100 units at 4 each and the next 100 at 6 each. At 150 units, the energy cost is 100 × 4 plus 50 × 6, or 700. Applying the upper rate of 6 to all 150 units gives 900. This page does not implement that slab schedule. You can calculate the slabs separately and use the page only as a flat-rate cross-check with an explicitly derived average energy rate. Do not label that average an official tariff.
Actual bills may include a minimum charge, a meter multiplier, subsidies, adjustments, arrears, or taxes with a different basis. The percentage tax in this form is a simplified assumption; confirm how it is applied by checking the explanation alongside the tool. Do not place unpaid historical charges into current consumption merely to make the total match. They describe separate billing items and obscure the relationship between the meter and this interval's usage.
Compare the bill's opening and closing readings with the meter and check whether either is estimated. Then check the dates and multiplier before reviewing appliance use. A 1,000-watt appliance operating for two hours uses two kilowatt-hours under a constant-load assumption. Real equipment may cycle, so its rated wattage times clock time is a planning estimate rather than a meter measurement. Keep measurements and assumptions distinct when reporting a discrepancy to the supplier.
If usage is zero, the energy charge can be zero while the fixed charge remains payable in this model. That is why a zero-use test should not be expected to produce a zero bill. Preserve your units, dates, rates, and separate charges with the calculation so the supplier can explain any remaining difference using its current tariff rules.