Curtains & Windows

Window Treatment Cost Calculator

Compare the complete cost of treating multiple same-size windows.

Window-treatment worksheet

Enter the opening and treatment measurements for Window Treatment Cost Calculator

Method for this tool

What the Window Treatment Cost Calculator actually calculates

The combined material and hardware cost per window is multiplied by window count, then installation is added once. This assumes equal per-window costs, not necessarily equal measured areas. The tool does not derive fabric usage, fabrication charges, discounts, or tax from dimensions.

The calculation path

Per-window material and hardware cost is multiplied by quantity, then installation is added.

Inputs that can change the answer

Number of windows: Enter number of windows as a number; use the definition in the calculation method.
Treatment per window: Enter treatment per window as a number; use the definition in the calculation method.
Hardware per window: Enter hardware per window in the selected currency; keep tax and included work consistent.
Installation total: One installation charge for the entire group of windows; do not enter the charge for one window.
Currency: Label for all entered prices; no currency conversion is performed.

Checks that stay outside the formula

Request separate prices for fabric, hardware, fabrication, and fitting when comparing quotes.

A practical order for entering the data

Count the windows receiving the same treatment and hardware package.
Enter treatment and hardware cost for one window.
Enter installation as one project-wide amount, then compare the total with an itemized quote.

Project walkthrough: Compare blinds and curtains from the same window measurements

Engine check using the prefilled sample

Window-treatment example: number of windows = 3, treatment per window = 150, hardware per window = 35, installation total = 120 and currency = USD ($). Replace the sample opening and fabric or hardware values with measurements taken for the mounting method you plan to use.

Results for these inputs

Treatment and hardware per window: 185.00 USD
Estimated project cost: 675.00 USD

Project-specific method

Worked example and purchase checks

Use one consistent scope across every option you compare. The calculator adds per-window treatment and hardware cost for the entered number of windows, then adds the project-level installation amount. Keeping installation separate avoids multiplying a single fitting quote by the window count by mistake.

Illustrative worked example

Three similar windows are compared on one scope: 150 units of treatment material and fabrication, 35 units of hardware per window, plus 120 units of project-level fitting.

Exact inputs for this example

Number of windows	3
Treatment per window	150
Hardware per window	35
Installation total	120
Currency	USD ($)

Treatment and hardware per window: 185.00 USD
Estimated project cost: 675.00 USD

How to read the result

The total is a like-for-like comparison checkpoint, not a supplier quote. Keep the exact inclusions beside each option, and split the project into separate groups whenever window size, hardware, lining, motorisation, or installation access changes.

Assumptions this example makes

The windows being grouped are similar enough to use the same per-window treatment and hardware allowance.
Installation is entered as one total for the project rather than a per-window price.
All monetary inputs use the same selected currency and no exchange-rate conversion is performed.

What this calculator does not prove

It does not calculate fabric yardage, blind order dimensions, motorisation, electrical work, delivery, tax, or unusual access charges unless those costs are included in the entered allowances.
Different window sizes or treatment types should be priced in separate groups instead of averaged into one misleading per-window figure.

Keep treatment comparisons on the same scopeSketch is explanatory, not to scale.

Mistakes that change this result

Comparing a fully fitted curtain quote with a blinds price that excludes fitting or hardware.
Entering a per-window installation price in the project-level installation field and then mentally multiplying it again.
Using the same allowance for windows that have materially different dimensions or mounting conditions.