Estimate residential and commercial electricity charges with confidence. Test slabs, taxes, rebates, and usage quickly. See detailed billing outputs, tables, exports, and savings insights.
| Scenario | Method | Units | Energy Charge | Extra Charges | Payable Amount |
|---|---|---|---|---|---|
| Home Bill Sample | Slab | 350 | Rs. 3,250.00 | Rs. 660.50 | Rs. 3,910.50 |
| Shop Bill Sample | Flat | 420 | Rs. 5,040.00 | Rs. 1,018.60 | Rs. 6,058.60 |
| Peak Demand Sample | Time of Use | 300 | Rs. 4,200.00 | Rs. 845.00 | Rs. 5,045.00 |
Flat tariff: Energy Charge = Total Units × Flat Rate
Time of use tariff: Energy Charge = (Peak Units × Peak Rate) + (Off Peak Units × Off Peak Rate)
Slab tariff: Each unit block is charged at its own slab rate.
Base Amount: Energy Charge + Fixed Charge + Fuel Adjustment + Meter Rent
Tax Amount: Base Amount × Tax Percent ÷ 100
Duty Amount: Base Amount × Duty Percent ÷ 100
Surcharge Amount: Base Amount × Surcharge Percent ÷ 100
Gross Amount: Base Amount + Tax Amount + Duty Amount + Surcharge Amount
Net Amount: Gross Amount − Rebate Amount + Previous Due
Final Payable: If Net Amount is below Minimum Bill, the Minimum Bill is used.
Electricity tariffs are not based on units alone. Real bills include several moving parts. Energy use is only the starting point. Many utilities also add fixed charges, fuel adjustment, meter rent, taxes, duty, and surcharges. Some bills also carry previous dues. A calculator that combines all items gives a better estimate.
This page supports three common billing methods. The slab method applies different rates across usage bands. The flat method uses one rate for all units. The time of use method separates peak and off peak consumption. That makes the tool useful for homes, shops, and light industrial checks. It also helps compare billing structures before a tariff change.
The slab model is very important in electrical billing. Lower units may be billed at one rate. Higher units may be billed at a stronger rate. This progressive structure changes the final amount fast. A small rise in usage can push part of the bill into a higher band. The slab breakdown table helps you see where each unit block is priced.
Extra charges matter because they change the payable total. Fixed charges stay the same even if usage falls. Fuel adjustment changes with generation cost. Taxes and duty are often percentage based. Surcharges may apply for special conditions. Rebates reduce the bill. Minimum bill rules can still hold the final amount above your calculated value.
Use this calculator for planning, auditing, and quick what if testing. Enter units and choose a billing method. Add rates and extra bill components. Submit the form to see the result above it. Then export the summary as CSV or PDF. The output table is useful for sharing, reporting, or checking internal estimates.
Because every charge is shown separately, the calculator is also good for teaching. Students, engineers, and billing staff can study how each parameter affects the result. Change one input at a time. The effective per unit cost will show how hidden charges influence the real tariff.
No calculator can replace an official utility statement. Billing rules differ by supplier and region. Some providers use special slabs, seasonal rates, taxes, or protected categories. Still, this tool is practical for early analysis. It helps users understand structure, not just totals. Better visibility often leads to better energy decisions.
It estimates electricity charges using slab, flat, or time of use billing. It also includes fixed charges, fuel adjustment, taxes, duty, surcharge, rebate, previous dues, and minimum bill checks.
A slab tariff charges different unit blocks at different rates. Lower usage may be cheaper. Higher usage can move some units into a more expensive slab.
Use it when your provider charges one rate during peak hours and another during off peak hours. The calculator adds both parts into one energy charge.
Energy charge is only one part of the bill. Fixed fees, fuel cost changes, taxes, duty, surcharge, and previous dues can raise the final payable amount.
Yes. Enter a rebate percent. The calculator subtracts that rebate from the gross amount before previous dues and minimum bill checks are finalized.
Some suppliers enforce a minimum payable amount. If your net total falls below that number, the calculator will use the minimum bill as the final payable amount.
Yes. After calculation, use the CSV or PDF buttons. The exported file includes the bill summary, and the slab table is also added when slab billing is selected.
No. It is a planning and checking tool. Official bills may include regional taxes, protected slabs, seasonal rules, demand charges, or provider specific adjustments.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.