What is a unit of electricity (kWh)?

One unit of electricity equals one kilowatt-hour (1 kWh). A kilowatt-hour represents using 1,000 Watts of electrical power continuously for one full hour. For example, running a 1,000-Watt microwave for 1 hour consumes exactly 1 unit (1 kWh), while running a 100-Watt television for 10 hours also consumes exactly 1 unit.

How does tiered or slab-based electricity pricing work?

Utilities use tiered pricing (also known as inverted block tariffs) to encourage energy conservation. Your total monthly consumption is broken down into progressive brackets. The lowest tier (e.g., 0–100 units) is billed at the cheapest baseline rate. When your usage crosses into higher brackets (e.g., 101–200 units, 201+ units), only the units within those higher brackets are charged at the elevated tier rates.

What are fixed charges and regulatory taxes on an electric bill?

Electric utility bills typically contain three parts: (1) Energy Charges—the volumetric cost of electricity consumed across billing slabs; (2) Fixed Charges—standing monthly operational fees covering grid infrastructure maintenance and meter rental; and (3) Taxes & Surcharges—local government taxes (GST/VAT/state sales tax), fuel cost adjustments, or renewable energy mandates calculated as a percentage of the bill.

Why is electricity consumption typically higher in the summer?

Air conditioning is by far the most power-intensive household load. A typical 1.5-ton AC draws 1,500 to 2,000 Watts. Operating an AC for 8 hours daily adds approximately 12 to 16 kWh every day—or 360 to 480 units per month. When this massive load pushes your total consumption into higher tier slabs, the cost per unit also rises, creating a compounding effect on your bill.

What is 'phantom' or 'vampire' power draw?

Phantom load refers to electrical energy consumed by electronic devices while turned off or in standby mode (such as smart TVs, gaming consoles, microwaves with clocks, and phone chargers). According to the U.S. Department of Energy, standby power accounts for 5% to 10% of residential electricity use. Using smart power strips or switching off appliances at the wall outlet helps curb this waste.

Are my meter readings and utility rates kept private?

Yes. 100% of calculations execute locally inside your client web browser. No meter numbers, utility tariffs, consumption amounts, or billing receipts are ever transmitted to an external server or stored in a database.

Electricity Bill Unit & Cost Calculator

Calculate your monthly electricity bill with custom tiered/slab rates, fixed charges, and taxes, or compute individual appliance power consumption and cost.

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Electricity Bill Unit & Cost Calculator

Tiered Slab Billing, Meter Readings & Appliance Energy Cost Estimator

Currency:

1. Consumption Inputs & Meter Mode

Previous Reading (kWh)

Current Reading (kWh)

Fixed Charges & Surcharges

Fixed Charge ($)

Meter Rent ($)

Tax / Duty (%)

2. Electric Utility Slabs / Tiers

Tier 1

kWh

$/kWh

Tier 2

kWh

$/kWh

Tier 3

kWh

$/kWh

Tier 4

Above All (Unlimited)

$/kWh

Estimated Total Electricity Bill

$92.99total payable

Total Consumption: 350 kWhEffective Rate: $0.266 / unit

Tier Cost Contribution RatioBase Energy: $71.00

20%

25%

34%

21%

Tier 1: $14.00

Tier 2: $18.00

Tier 3: $24.00

Tier 4: $15.00

Itemized Billing Statement

Billing Item / Bracket	Units (kWh)	Rate ($/unit)	Amount ($)
Tier 1 (Next 100 kWh)	100	$0.14	$14.00
Tier 2 (Next 100 kWh)	100	$0.18	$18.00
Tier 3 (Next 100 kWh)	100	$0.24	$24.00
Tier 4 (Above 300 kWh)	50	$0.30	$15.00
Fixed Monthly Service Charge	—	—	$12.00
Meter Rent / Regulatory Surcharge	—	—	$3.50
Taxes & Government Duty (7.5%)	—	—	$6.49
Net Total Amount Payable	350 kWh	—	$92.99

1. How is an Electricity Bill Calculated?

A standard residential or commercial electricity bill comprises three fundamental financial components:

Energy Charges (kWh)

The core volumetric fee based on actual power consumed. One unit equals one Kilowatt-Hour (1 kWh) of electricity. In tiered tariffs, units are segmented into consecutive pricing slabs, with heavier consumers paying progressively higher unit rates.

Standing & Fixed Fees

Static monthly overhead fees independent of consumption volume. These support physical grid infrastructure, transformer upkeep, meter inspection and rental fees, and emergency substation maintenance.

Taxes & Surcharges

Government levies including electricity duty, value-added taxes (GST/VAT), environmental tariffs, or fuel price adjustment (FPA) charges applied as a percentage on the subtotal.

2. How to Use the Electricity Bill Calculator?

Follow these systematic steps to audit your energy expenses:

Monthly Bill (Tier/Slab Mode):

Pick your preferred currency symbol from the top dropdown.
Enter previous and current meter readings, or type consumed units directly.
Customize your utility's billing tiers by adding, removing, or modifying rate thresholds.
Add standing monthly charges (fixed fees, meter rent) and regulatory tax percentages.
Review the itemized statement and visual tier ratio bar, then click "Copy Bill Breakdown".

Appliance Power Estimator:

Select a quick preset (AC, Refrigerator, TV, Geyser) or type a custom Wattage rating.
Specify daily operating hours and monthly usage days.
Input your local unit electricity rate (cost per kWh).
Inspect daily, monthly, and annual financial cost projections alongside the estimated carbon footprint.
Identify high-draw appliances to optimize your household energy schedule.

3. Common Household Appliances Power Consumption Guide

Average power ratings and estimated monthly kilowatt-hour consumption across typical domestic appliances:

Household Appliance	Typical Wattage	Daily Run Time	Monthly Units (kWh)	Estimated Monthly Cost (@ $0.20/kWh)
Air Conditioner (1.5 Ton)	1,500 – 2,000 W	8 Hours	360 – 480 kWh	$72.00 – $96.00
Water Heater / Geyser	2,000 – 3,000 W	1.5 Hours	90 – 135 kWh	$18.00 – $27.00
Refrigerator (Frost-Free)	250 – 400 W	12 Hours (duty cycle)	90 – 144 kWh	$18.00 – $28.80
Gaming Desktop / Workstation	400 – 600 W	5 Hours	60 – 90 kWh	$12.00 – $18.00
Microwave Oven	1,000 – 1,500 W	0.5 Hours (30 mins)	15 – 22.5 kWh	$3.00 – $4.50
Washing Machine	500 W	1 Hour (15 days/mo)	7.5 kWh	$1.50
Ceiling Fan (Standard)	75 W	12 Hours	27 kWh	$5.40
55-inch LED Smart TV	100 W	5 Hours	15 kWh	$3.00
LED Light Bulbs (Pack of 5)	50 W total (10W each)	6 Hours	9 kWh	$1.80

Frequently Asked Questions

One unit of electricity is internationally defined as one Kilowatt-Hour (1 kWh). A kilowatt-hour represents 1,000 Watts of power expended over 1 hour. To calculate units: multiply the appliance's Wattage by the hours used and divide by 1,000 (Units = [Watts × Hours] / 1,000).

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Billing Item / Bracket

Units (kWh)

Rate ($/unit)

Amount ($)

Tier 1 (Next 100 kWh)

100

$0.14

$14.00

Tier 2 (Next 100 kWh)

100

$0.18

$18.00

Tier 3 (Next 100 kWh)

100

$0.24

$24.00

Tier 4 (Above 300 kWh)

$0.30

$15.00

Fixed Monthly Service Charge

—

$12.00

Meter Rent / Regulatory Surcharge

—

$3.50

Taxes & Government Duty (7.5%)

—

$6.49

Net Total Amount Payable

350 kWh

—

$92.99

Household Appliance

Typical Wattage

Daily Run Time

Monthly Units (kWh)

Estimated Monthly Cost (@ $0.20/kWh)

Air Conditioner (1.5 Ton)

1,500 – 2,000 W

8 Hours

360 – 480 kWh

$72.00 – $96.00

Water Heater / Geyser

2,000 – 3,000 W

1.5 Hours

90 – 135 kWh

$18.00 – $27.00

Refrigerator (Frost-Free)

250 – 400 W

12 Hours (duty cycle)

90 – 144 kWh

$18.00 – $28.80

Gaming Desktop / Workstation

400 – 600 W

5 Hours

60 – 90 kWh

$12.00 – $18.00

Microwave Oven

1,000 – 1,500 W

0.5 Hours (30 mins)

15 – 22.5 kWh

$3.00 – $4.50

Washing Machine

500 W

1 Hour (15 days/mo)

7.5 kWh

$1.50

Ceiling Fan (Standard)

75 W

12 Hours

27 kWh

$5.40

55-inch LED Smart TV

100 W

5 Hours

15 kWh

$3.00

LED Light Bulbs (Pack of 5)

50 W total (10W each)

6 Hours

9 kWh

$1.80

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Electricity Bill Unit & Cost Calculator

Electricity Bill Unit & Cost Calculator

Itemized Billing Statement

1. How is an Electricity Bill Calculated?

Energy Charges (kWh)

Standing & Fixed Fees

Taxes & Surcharges

2. How to Use the Electricity Bill Calculator?

Monthly Bill (Tier/Slab Mode):

Appliance Power Estimator:

3. Common Household Appliances Power Consumption Guide

Frequently Asked Questions

Related tools

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Electricity Bill Unit & Cost Calculator

Itemized Billing Statement

1. How is an Electricity Bill Calculated?

Energy Charges (kWh)

Standing & Fixed Fees

Taxes & Surcharges

2. How to Use the Electricity Bill Calculator?

Monthly Bill (Tier/Slab Mode):

Appliance Power Estimator:

3. Common Household Appliances Power Consumption Guide

Frequently Asked Questions