BijliCalculator started with a simple observation: in India, a household can receive the same number of units on its electricity bill and pay wildly different amounts depending on its state, its DISCOM, the sanctioned load, the slab structure, the fuel adjustment charge of the month, and whether the state runs a subsidy. Very few people can check whether the number printed on their bill is right — because the formula is spread across tariff orders, supply codes and notices nobody reads.
We decided to fix that for ourselves first, and then for everyone. The site is a pair of tools: a calculator that itemises a bill line by line — energy charges by slab, fixed charge, FAC, duty, arrears and subsidy — and a blog that explains what each of those lines means in plain English.
What we do
- Bill estimates for all 36 states and UTs. Every major DISCOM is covered, each with its own calculator page pre-filled with that state's tariff structure.
- Verified tariff data. Slabs and fixed charges are cross-checked against published SERC tariff orders, and the tariff directory links every number back to its regulator source.
- Free, always. No account, no sign-up, no paywall, no ads on the calculators. Everything runs in your browser — see the privacy policy for what that means.
- Plain-English education. The blog covers FAC and FPPCA, slab traps, smart meters, time-of-day tariffs, subsidies, name transfers and the late payment fee — the questions people actually ask about their bills.
How accurate is the calculator?
The estimate is as accurate as the tariff order it is built from. Slab rates and fixed charges are entered from the latest published SERC orders we could verify at the time of writing, and each state page notes its source. But a real bill can still differ from an estimate, because three inputs change month to month: the fuel adjustment charge (FAC) is recalculated every billing cycle, arrears from earlier estimated readings land unpredictably, and demand-based penalties or incentives apply only to specific categories. The disclaimer sets out the limits in full.
Where a state runs a free-unit or subsidy scheme, the calculator applies it the way the DISCOM's own billing systems do — at the end, after the energy charge is computed.
Who is this for
Anyone who has ever opened an electricity bill and felt the number at the bottom was an act of God. Homeowners checking a sudden jump, tenants settling a deposit dispute, EV owners sizing up a new tariff category, solar households reconciling a net-metering bill — all of them use the same set of tools. If you manage a house or a small business, you are our user.
What we don't do
We are not a government body, a DISCOM, or a licensed adviser. We do not file complaints, we do not read meters, and we do not give legal or financial advice. We make the rules legible — the state regulator and the DISCOM remain the authority on your specific account. When a dispute is real, the CGRF and Ombudsman route is the one that resolves it, and we document it for you.
Contact
Questions, corrections, or a tariff order we got wrong? Email us — details on the contact page. We take corrections seriously: a wrong number in a tariff table is a wrong number in thousands of estimates.