Why does cost per input kWh fall as shared energy rises?

The fixed water and instrumentation charge spreads across more kilowatt hours, so the effective rate falls. At the defaults the allocated cost is $107.10 and the fixed charge adds $300.

What counts as shared test-stand energy?

All metered energy for the period before allocation, from one meter or a documented power times duration estimate. Do not pre-multiply by the share, because the calculator applies it once.

Can the allocation share exceed 100%?

No. A test cannot be allocated more than the shared energy for the period. If this test used the whole stand, enter 100 and leave the other users out of this run.

How does a target test cost help?

It turns the result into a pass or fail signal. A total above target raises a warning and names the dollars over, so the test engineer can trim duration or correct the allocation.

Water, Wastewater & Pump Systems Manufacturing calculator

Flow Test Energy Cost Calculator

Allocate shared test-stand electricity to a pump test by its energy share, then add the fixed water and instrumentation charge. Cost per input kWh shows the effective rate, and the variance compares the total with your target.

What this calculator does

Test-stand electricity allocated to one pump test plus fixed charges, against the target test cost.

Formula used

Allocated electricity cost = shared test-stand energy × electricity rate × allocation share ÷ 100
Total flow test energy cost = allocated electricity cost + fixed water and instrumentation cost
Cost per input kWh = total flow test energy cost ÷ shared test-stand energy
Cost variance = target test cost − total flow test energy cost

Inputs explained

Shared Test-Stand Energy for the Period: Metered energy for the stand before allocation, in kilowatt hours.
Electricity Rate at the Test Stand: Delivered rate from the utility bill for the period.
Energy Share Allocated to This Pump Test: Share of stand energy assigned to this test; 100 if metered alone.
Fixed Water and Instrumentation Cost: Water, instrumentation and setup charges for this test.
Target Test Cost: Test cost you need to stay within, from the quote.

How to use the result

Best suited to costing a witness test, checking an allocation share, setting a test cost target.
Test energy measured at one speed or impeller does not transfer unchanged to another, per the affinity laws. A shared meter needs a defensible allocation basis, or the per-test cost will be disputed.

Current U.S. benchmarks

As of Jul 2026, industrial electricity averages 9.8 cents per kWh across the U.S. (EIA), up 4.7% from a year earlier. State averages range widely, so plants should confirm against their own tariff.
The U.S. has 21,668 machinery manufacturing establishments employing about 1,086,146 workers (Census County Business Patterns, 2023).

Common questions

Why does cost per input kWh fall as shared energy rises? The fixed water and instrumentation charge spreads across more kilowatt hours, so the effective rate falls. At the defaults the allocated cost is $107.10 and the fixed charge adds $300.
What counts as shared test-stand energy? All metered energy for the period before allocation, from one meter or a documented power times duration estimate. Do not pre-multiply by the share, because the calculator applies it once.
Can the allocation share exceed 100%? No. A test cannot be allocated more than the shared energy for the period. If this test used the whole stand, enter 100 and leave the other users out of this run.
How does a target test cost help? It turns the result into a pass or fail signal. A total above target raises a warning and names the dollars over, so the test engineer can trim duration or correct the allocation.

Last reviewed 2026-10-01.