Standby electricity calculator

Estimate the monthly and annual electricity cost of devices left in standby using measured watts, standby hours and device count.

Last reviewed: 8 September 2026 · Methodology

Calculate

Power0 – 1,000Hours per day0 – 24Number of devices0 – 1,00,000

Electricity price (INR/kWh)0 – 10,000

Country reference price selected.

₹8.00/kWh is an illustrative input, not an India-wide average or an official electricity tariff. Replace it with the applicable rate for your state, DISCOM, consumer category and consumption slab.

Last reviewed: 9 September 2026

Published prices and supplier examples

Each reference applies only to its stated period, area and customer profile. Fixed charges and partial bill components are shown for context; only comparable variable prices can be applied.

Tata Power-DDL · Delhi · 201–400 kWh/month
4.5 INR/kWh · Base schedule from 01 Oct 2021 · FY26 handbook
Domestic energy charge only, reproduced in the official FY26 customer handbook. This band applies within the household's monthly slab calculation, not to an appliance in isolation. Excludes fixed charges, PPAC/FPPAS, regulatory and pension surcharges, electricity tax and subsidies. The base schedule is published from 1 October 2021; verify current adjustments on your bill. This is not an all-India average or the full cost of a kWh.
Tata Power-DDL · Customer handbook FY26, pp. 9–10 · Last reviewed: 10 September 2026
Context only: this is not a complete variable price for estimating savings.
MSEDCL · Maharashtra · 101–300 kWh/month
10.8 INR/kWh · FY 2026–27 · from 01 Apr 2026
Domestic LT-I(B), sanctioned load below 20 kW, energy charge only. The applicable slab depends on the household's total monthly consumption. Wheeling of ₹1.60/kWh, fixed charges of ₹130/month (₹435 for three-phase), FAC, taxes and any subsidy are separate. This example is not a complete bill, supplier ranking or national average.
MSEDCL · Tariff order 25 March 2026, p. 95 · Last reviewed: 10 September 2026
Context only: this is not a complete variable price for estimating savings.

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Your estimate

Estimate — adjust the assumptions to your situation.

Annual cost₹876.00

Monthly cost₹73.00

Daily cost₹2.40

Average daily0.3 kWh

Monthly9.13 kWh

Annual109.5 kWh

Illustrative variable rate per kWh. Replace with your bill; fixed charges are excluded.

Standby consumption depends on the model and enabled features. Network connectivity, quick-start settings and displays can change the load. Enter a measured standby value where possible and only include hours when the devices are in that state.

Formula

Annual standby use = watts per device ÷ 1,000 × standby hours per day × device count × 365. Cost = kWh × your electricity rate. Monthly consumption and cost are annual totals divided by 12.

Worked example

Five devices drawing 2 W each for 20 standby hours a day consume 0.2 kWh daily and 73 kWh annually. Multiply 73 by the price per kWh on your bill to estimate their energy cost.

What the result means

The result identifies whether a measured standby load is worth investigating. If devices have different loads or schedules, calculate them separately rather than using one value for every device.

Electricity price · India

Electricity duty, fuel or power purchase adjustments, fixed charges and subsidies depend on the applicable state and DISCOM rules. No national tax percentage or subsidy is assumed. Slab thresholds, sanctioned-load charges and time-of-day tariffs are not automatically modelled.

Assumptions and limits

The model assumes the same standby pattern every day. It excludes active operation and does not determine whether equipment can safely be disconnected.

Questions answered

Should I use 24 standby hours?

Only if the device remains in standby all day. Subtract hours of active operation.

Is switching everything off always appropriate?

Check the manufacturer’s instructions. Refrigeration, alarms, medical equipment and essential networking may need continuous power.

Methodology · Report an error

Data sources

Last reviewed: 2026-09-08