Door and window trim estimator

Door Casing Calculator

Estimate door casing and window casing sticks from opening counts, average casing perimeter, stock length, waste, optional corner blocks, and material cost. It fills the finish-carpentry gap beside baseboard and crown molding.

Units

Door openings Window openings Average door casing perimeter (ft)Average window casing perimeter (ft)Stock casing length (ft)Waste / miters (%)Cost per casing stick ($)Optional cost per corner block ($)

Casing sticks to buy

Linear casing

Corner blocks

Rough cost

Trim details change real stick count

This calculator estimates straight casing stock only. Reveal size, stool and apron, rosettes, miter waste, stain-grade matching, casing profile, jamb extensions, and out-of-square openings can change the final material list.

Android App

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Baseboard Trim Calculator

Estimate room perimeter trim after casing takeoffs.

Crown Molding Calculator

Estimate upper-wall trim for the same room package.

Rough Opening Calculator

Check door and window rough openings before trim work begins.

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Door casing formula

Measured casing = doors x average door casing perimeter + windows x average window casing perimeter

Order length = measured casing x (1 + waste %)

Casing sticks = order length / stock stick length

Corner blocks = (doors + windows) x 4 when using block corners

Sample takeoff

Six doors at 17 ft casing perimeter and four windows at 14 ft perimeter need about 177 linear ft with 12% waste, so buy about 13 sticks at 14 ft stock. Corner blocks would total 40 pieces.Six doors at 5.2 m casing perimeter and four windows at 4.3 m perimeter need about 54 m with 12% waste, so buy about 13 sticks at 4.2 m stock. Corner blocks would total 40 pieces.

Door Casing Calculator FAQ

How do I calculate door casing sticks?+

Multiply each door or window by its casing perimeter, add waste for miters and matching, then divide by stock casing length.Multiply each door or window by its casing perimeter, add waste for miters and matching, then divide by stock casing length.

Should I count windows too?+

Yes if the same casing stock is used. Enter a separate average window casing perimeter so the trim list stays realistic.Yes if the same casing stock is used. Enter a separate average window casing perimeter so the trim list stays realistic.

Does this include stool, apron, or jamb extensions?+

No. Add those pieces separately if the trim detail needs them.No. Add those pieces separately if the trim detail needs them.