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DIY Cost Tools

DIY Cost Tools

Door Weatherstrip Calculator

Plan the top and two sides of rectangular door frames and estimate whole weatherstrip packs.

Whole number from 1 to 500 doors.
Number from 1 to 120 in.
Number from 1 to 144 in.
Number from 0 to 100 %.
Number from 1 to 1000 ft.

Enter values in the units shown. Empty fields, fractions, comma-formatted numbers, values outside the listed ranges, and non-finite values are rejected.

Strip length
Whole packs

How to use this calculator

  1. Measure the project or enter costs from a current quote or product label.
  2. Adjust the quantities, coverage, package size, and allowances to match your situation.
  3. Select Calculate, then check the method, worked example, and limitations below.

Formula and method

Length = doors × (width + 2 × height) ÷ 12 × (1 + allowance%). Packs round up by pack length.

Whole packages and pieces are rounded up. Results disappear when an input changes until the new values are calculated.

Worked example

Doors 3 doors; Door width 36 in; Door height 80 in; Cutting allowance 10 %; Length per pack 17 ft. Results: Strip length 53.9 ft; Whole packs 4 packs.

The example uses the values initially displayed in the fields.

Limitations

This covers the head and jambs only. Door sweeps, thresholds, gaps, and profile compatibility require separate checks.

Review and reference

Reviewed October 5, 2026. The default example, input boundaries, arithmetic, rounding, and invalid input behavior were checked. The method is explained on How Our Calculators Work; replace example inputs with measurements or current product specifications. This is a planning estimate.

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