Global calculator · Energy bills & appliances

Time-of-Use Electricity Plan Comparison

Time-of-use plans are difficult to compare because a cheaper off-peak rate can be offset by expensive peak consumption. Enter the kWh used in each period and the rates from the two plans. GharGanit compares energy charges on the same usage, shows the break-even off-peak share and keeps standing or supply charges outside the result unless you enter them explicitly.

No account Formula visible Your rate and units

Use your evidence

What to have beside you

Use the current bill or tariff sheet, exact product label, location-specific solar estimate, or measured project dimensions. Example physical values teach the tool; zero money rates prevent an unsourced price from becoming a default claim.

USUSA GBUK AUAustralia CACanada EUEU NZNew Zealand SGSingapore

Enter your details

Your values

Every input includes a simple explanation.

Simple wordsFormula shownPrivate inputs

Simple viewUsing editable example assumptions for technical settings.

Peak-period useUser-entered value — example shownThe electricity used during the peak-price period.

kWh

Off-peak useUser-entered value — example shownThe electricity used during the cheaper off-peak period.

kWh

Peak rateUser-entered value — example shownThe price of one kilowatt-hour during the expensive time-of-use period.

USD/kWh

Off-peak rateUser-entered value — example shownThe price of one kilowatt-hour during the cheaper time-of-use period.

USD/kWh

Flat-plan rateUser-entered value — example shownThe price of one kilowatt-hour on the single-rate plan you want to compare.

USD/kWh

Difference in fixed chargesUser-entered value — example shownCharges that do not change with the number of kilowatt-hours used, such as a standing or service charge.

USD

Helpful tip: Enter time-of-use fixed charges minus flat-plan fixed charges for the same period.CurrencyUser-entered value — example shownThe currency used on your bill or quote. It changes the symbol, not the formula.

Helpful tip: Choose the currency printed on your bill or quote. No exchange-rate conversion is performed.

Private: calculations run in your browser; a saved scenario stays on this device.

Your result

TOU plan lower by

$0.00

The entered plans cost the same for this usage split.

Time-of-use comparison cost$0.00

Flat-plan comparison cost$0.00

Your off-peak share60%

Break-even off-peak shareNot defined

How this was calculated

Formula used

TOU cost = peak kWh × peak rate + off-peak kWh × off-peak rate + fixed-charge difference; flat cost = total kWh × flat rate

Your values in the formula

TOU = 200 kWh × $0.00 + 300 kWh × $0.00 + $0.00 = $0.00; flat = 500 kWh × $0.00 = $0.00

Assumptions and rounding

The fixed-charge field is TOU fixed charges minus flat-plan fixed charges.
Seasonal, weekend, demand and tax rules are excluded unless represented in the entered rates.

Real plans can add seasonal bands, weekends, controlled loads, taxes or demand charges. Compare the current supplier documents for your meter and location.

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What the result means

Use it as a scenario

Real plans can add seasonal bands, weekends, controlled loads, taxes or demand charges. Compare the current supplier documents for your meter and location.

Enter the same month's peak and off-peak kWh from a smart-meter report, then copy the current plan rates. Zero rates intentionally produce no price claim.

What can change