Budget & Cost

Lighting Budget Calculator

Plan fixture, lamp, control, installation, and contingency costs.

Free interactive tool

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Method & guidance

How the Lighting Budget Calculator works

Quantity-weighted fixture costs and fixed electrical costs are combined before contingency.

How to use this tool

  1. Collect accurate values for fixtures, average fixture price, lamps and controls.
  2. Enter measurements in the displayed units and select the choices that match this project.
  3. Select Calculate / Generate, then compare the outputs with the stated Lighting Budget Calculator method.
  4. Apply the result only after checking product specifications and real site conditions.

Example calculation or use case

For a worked Lighting Budget Calculator example, use Fixtures = 8, Average fixture price = 120, Lamps and controls = 260, Electrical installation = 700. The tool then applies this method: Quantity-weighted fixture costs and fixed electrical costs are combined before contingency.

Frequently Asked Questions

What information does the Lighting Budget Calculator use?

It uses the measurements and choices shown in the form. Quantity-weighted fixture costs and fixed electrical costs are combined before contingency.

How accurate is the Lighting Budget Calculator result?

The calculation is mathematically consistent with the stated assumptions. Confirm whether dimmers require neutral wiring or compatible drivers. Real products, site conditions, and supplier specifications can still change the final decision.

Should I include an allowance?

Use the result as a planning baseline and keep a sensible reserve for site variation, delivery, or fitting.

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