Electricity Bill Calculator

An Electricity Bill Calculator helps you estimate your monthly electricity bill using either slab-based tariff rates or a flat rate per unit. Most Indian states use slab-based pricing where the rate per unit increases progressively with consumption (e.g., ₹4/unit for 1-100 units, ₹5.50/unit for 101-200 units, and so on).

This calculator supports both modes – switch between Slab-Based and Flat Rate tabs as per your requirement. In slab mode, you can edit, add, or remove tariff slabs to match your local DISCOM rates. The calculator then provides a slab-wise breakup of charges along with fixed charges and taxes for an accurate bill estimate.

This is useful for verifying your electricity bill, comparing costs across different consumption levels, or budgeting your monthly household expenses.

Follow these steps to calculate your electricity bill:

Step 1: Choose your calculation mode – Slab-Based (progressive rates) or Flat Rate (single rate per unit).

Step 2: Enter your total units consumed (kWh) from your meter reading.

Step 3 (Slab Mode): The default tariff slabs are pre-filled. Click the "Edit Slabs" button to customize the slab ranges and rates to match your state's DISCOM tariff.

Step 3 (Flat Rate Mode): Enter your rate per unit (₹/kWh).

Step 4: Add any fixed/monthly charges and tax/surcharge percentage.

Slab-Based Formula:

Energy Charges = Sum of (Units in each slab × Slab rate)

Total Bill = Energy Charges + Fixed Charges + Tax%

Flat Rate Formula:

Total Bill = (Units × Rate per Unit) + Fixed Charges + Tax%

You can find your tariff slabs, fixed charges, and tax rates on your last electricity bill or from your state DISCOM website.