How much window casing do I need?

For picture-frame style casing on all four sides of each window.

WindowsWindow width (in)Window height (in)

Casing (16 ft pieces)

9 pieces

Casing needed136 linear ft

Estimated material cost

Casing

9 x $$25.00 per 16 ft piece

$225

Estimated total$225

Typical store prices before tax and delivery. Change any price to match your store.

How to measure

Count the windows and measure the width and height of the window openings.

Tips from the field

Adds extra for the miter corners. Use a stool and apron at the bottom instead if you prefer.
Measure each window. They're often not all the same size.

What you'll need

Window casingWindow stoolBrad nailsPaintable caulk

Common questions

Picture frame or stool and apron?

Picture frame wraps all four sides. Stool and apron gives a traditional sill look at the bottom.

How much extra casing do I need?

About 10% plus extra for each miter corner.

Are all windows the same size?

Often not. Measure each one before you buy.

Add this calculator to your websiteFree

Contractors, bloggers, and real estate agents can put this calculator on their own site for free. Copy the code below and paste it into any page.

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<p style="font:14px sans-serif">Free <a href="https://housecalcs.com/tools/window-casing-calculator">window casing calculator</a> from HouseCalcs</p>
<script>window.addEventListener("message",function(e){if(e.origin==="https://housecalcs.com"&&e.data&&e.data.hcSlug==="window-casing-calculator"){var f=document.getElementById("hc-window-casing-calculator");if(f)f.style.height=e.data.hcHeight+"px"}});</script>

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