Farm Electricity Cost Calculator

Work out farm electricity cost instantly with clear inputs, formula shown and shareable results.

About Farm Electricity Cost Calculator

Energy is connected load x hours x days, but the meter records input energy, which exceeds shaft output by the motor and drive losses — a load factor of about 0.85 for a well-matched induction motor pump set. Multiplying billed units by the tariff gives the cost for the season.

Formula

Farm electricity cost

Shaft kWh = kW x hours x days; billed units = shaft kWh / motor efficiency; cost = billed units x tariff

Worked example

With the default values below, Farm Electricity Cost Calculator returns Electricity Cost of $22,711.76. Change any input above and every figure here is recalculated in your browser.

Inputs used

Connected Loadminimum 0.01 kW: 5.5 kW
Running Hours Per Dayminimum 0.1 h: 6 h
Days Of Operationminimum 1: 90
Electricity Tariffminimum 0 per kWh: 6.5 per kWh

Results

Electricity Cost: $22,711.76
Shaft Energy Consumed: 2,970.00
Units Billed: 3,494.12
Cost Per Day: $252.35

Step by step

1Values used
2Farm electricity cost
3Electricity Cost= 22,711.76
4Shaft Energy Consumed= 2,970.00
5Units Billed= 3,494.12
6Cost Per Day= 252.35

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why do billed units exceed the calculated figure?

Motor and pump inefficiency, cable losses and any power factor penalty. An old rewound motor can run at 70% efficiency, adding 20% to the bill for the same water delivered.

Is a flat agricultural tariff always cheapest?

Where a flat horsepower-based tariff applies, metered energy cost is irrelevant, but the incentive to fix leaks and worn pumps disappears. Check which tariff category applies to your connection.