Book a site visit

Calculator

Idle electricity savings calculator

Put a dollar figure on an always-on load. Enter kW, runtime and your own $/kWh and demand charge to see what it costs your factory over a year.

What it asks for: idle load (kW) · idle hours a year · $/kWh · demand charge ($/kW-month).

Run the numbers

What idle electrical load costs

Energy and demand, priced separately, because demand is set by your worst fifteen minutes of the month rather than by the month.

kW still drawn when nothing is being made, which is the overnight floor on your trace
nights, weekends and shutdowns added up
dollars per kWh, from your own bill
dollars per kW-month; only counts if this load is also what sets your monthly peak. Set it to 0 if it isn’t.

These controls need JavaScript to recalculate. The figures beside them are the worked example at the constants listed below: real arithmetic, just not yours yet. Send us your numbers at and we will run them.

What it costs you

$50,589/yr

  • 337,500kWh a year, at idle
  • $40,500of it is energy
  • $10,089of it is demand
Annual cost of an idle electrical load
YOUR NUMBERS25 kW: 16,863 $/yr50 kW: 33,726 $/yr75 kW: 50,589 $/yr150 kW: 101,178 $/yr300 kW: 202,356 $/yr16,86333,72650,589101,178202,356
YOUR INPUTS · YOUR RATES · CANADIAN DOLLARS

Conservative arithmetic, verified against your own utility bills. Your number comes from your own meters.

The assumptions behind this
  • electricity.blendedRate · 0.12 $/kWh[TOM-REVIEW]Ontario Class B blended rate as used in Quantify's own teleprompter ('6,000 hours a year at $0.12/kWh') and concept footnotes. VERIFY against the current IESO/OEB Class B blended rate.
  • electricity.demandChargeRate · 11.21 $/kW-month[TOM-REVIEW]Alectra Utilities, Guelph Rate Zone, General Service 50–999 kW interval-metered (Class B), from the OEB-approved Tariff of Rates and Charges effective 2026-01-01, Rate Order EB-2025-0055. Distribution volumetric $3.4474 + low-voltage $0.0257 + 2026 riders $0.0893 net + Retail Transmission Network $4.5377 + Line and Transformation Connection $3.1058 = $11.2059/kW-month. Typical range across urban Ontario LDCs is $10.50–$13.00; Toronto Hydro bills on kVA (~$19 equivalent) and Hydro One rural reaches ~$28. CLASS B ONLY: a Class A customer's economics are dominated by Global Adjustment, not by this charge.

Every constant used here shows its source under the result. [TOM-REVIEW] before launch (§G.2). Nothing is hard-coded in a component; the constants live in src/data/benchmarks.json and the city rates in src/data/water-rates.json.

Where these numbers come from

Every constant, its value, and the document it was read out of.

  • electricity.blendedRate · 0.12 $/kWh[TOM-REVIEW]Ontario Class B blended rate as used in Quantify's own teleprompter ('6,000 hours a year at $0.12/kWh') and concept footnotes. VERIFY against the current IESO/OEB Class B blended rate.
  • electricity.demandChargeRate · 11.21 $/kW-month[TOM-REVIEW]Alectra Utilities, Guelph Rate Zone, General Service 50–999 kW interval-metered (Class B), from the OEB-approved Tariff of Rates and Charges effective 2026-01-01, Rate Order EB-2025-0055. Distribution volumetric $3.4474 + low-voltage $0.0257 + 2026 riders $0.0893 net + Retail Transmission Network $4.5377 + Line and Transformation Connection $3.1058 = $11.2059/kW-month. Typical range across urban Ontario LDCs is $10.50–$13.00; Toronto Hydro bills on kVA (~$19 equivalent) and Hydro One rural reaches ~$28. CLASS B ONLY: a Class A customer's economics are dominated by Global Adjustment, not by this charge.

Want the real number instead of the estimate?

This page gives you an estimate from numbers you already half know. A meter gives you the real one. We will walk your floor, tell you what is worth measuring first, and put a figure on it.

Book a site visitSee the idle electricity case studies

or call 1-833-QUANTFY (1-833-782-6839)