What is a TNEB Electricity Bill Calculator?
A TNEB electricity bill calculator estimates the amount TANGEDCO (Tamil Nadu Generation and Distribution Corporation) may charge based on the electricity units consumed and your consumer category. It applies the relevant tariff slabs to give you a quick estimate before your official bill arrives.
How Electricity Units Are Measured
Electricity consumption is measured in units, where one unit equals one kilowatt-hour (kWh) — the energy used by a 1,000-watt appliance running continuously for one hour. Your electricity meter records the total units consumed during a billing cycle, and this reading is the main input for calculating your bill.
How the Calculation Works
Domestic and commercial electricity tariffs are typically structured in slabs, where different portions of your consumption are charged at different per-unit rates. This calculator applies your total units across the applicable slabs for your selected category, then adds any fixed or service charges to arrive at an estimated total.
What Affects Your Electricity Bill
- Total units consumed during the billing period
- Your consumer category (domestic, commercial, etc.)
- Applicable tariff slab rates, which can change over time
- Fixed or service charges, where applicable
- Taxes, duties, and other charges not included in this estimate
How to Use This Calculator
- Enter the number of units consumed shown on your meter or previous bill.
- Select your consumer category.
- Click Calculate to see your estimated slab-wise bill breakdown.
Important Limitations
This tool is not affiliated with TNEB, TANGEDCO, or any government body, and it does not access your actual meter or account data. Tariff values are configured separately from the calculation engine and are currently marked as requiring verification against the latest official tariff order. Actual bills may include taxes, subsidies, additional charges, or rounding differences not reflected here.