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Insulation & Sealing

Door Sweep Calculator: Door Width, Spare Units & Stock

Convert a set of compatible door bottoms into a whole-unit sweep purchase plan. Measure the door width, use a sweep stock length that can cover each door without an assumed splice, and keep seal profile, threshold clearance, fire-rating and accessibility requirements outside the arithmetic.

Maintained by Home Measure Lab Editorial TeamUpdated Method & corrections

Project measurements

Change the defaults to match your project and the product you plan to buy.

ft
ft
%
Quick values
$

Project result

Door-sweep stock plan

See compatible door count, minimum cut length, spare-adjusted whole units and purchased stock.

Planning estimate only. Verify product coverage, package size, supplier specifications and project requirements before purchasing.

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Budget scenario

Add your current local costs

Use a current supplier subtotal or reuse a priced calculator result, then add optional delivery, tax and contingency. Home Measure Lab does not fetch or guess live prices.

This calculator does not currently expose a priced result. Enter a current supplier subtotal manually.
Material subtotal$0.00
Delivery / fees$0.00
Tax$0.00
Contingency$0.00
Planning total$0.00

Enter a current supplier subtotal or reuse a priced calculator result.

Budget values are local planning inputs, not live quotes. Verify tax treatment, delivery, labor and supplier pricing before purchasing.

Methodology

Formula & assumptions

Required cut length

measured door width

Each modeled door requires one compatible sweep long enough for the cut.

Whole-unit target

door count × (1 + spare allowance), rounded up

Adds visible spare units rather than lengthening each door.

Purchased stock

whole units × selected sweep stock length

Shows total nominal stock purchased.

Purchased stock

whole sweep units × selected stock length

Shows the nominal linear stock purchased after whole-unit rounding.

How to measure this project

Measure the bottom width that the selected sweep must cover on each compatible door. Group doors only when one stock profile and nominal length can serve them. If door widths differ materially, use separate calculations because this tool assumes one average compatible width and does not design spliced sweeps.

Before you buy materials

Confirm that the selected sweep stock is at least as long as the modeled door width and that its profile works with the threshold, floor clearance and door operation. Some doors have fire, smoke, accessibility or weather-exposure requirements that affect product selection. The spare allowance is applied to whole units, which is more realistic than adding arbitrary extra length to every door.

Reference

Door-sweep purchase layers

LayerRecordKeep external
Door cutmeasured door widthThreshold and profile clearance.
Compatibilitysame sweep stockDoor/fire/accessibility requirements.
Sparewhole-unit reserveReplacement strategy.
Purchasewhole sweep unitsActual product length and profile.

Questions

Frequently asked questions

Can I use a shorter sweep and splice pieces?

This calculator does not model splices. Enter stock that is at least as long as the modeled door width.

Why is the allowance applied to whole units?

A door sweep is normally a discrete cut piece, so spare planning is clearer as extra units rather than extra length on each door.

Does this choose the correct sweep profile?

No. Verify threshold, door operation and any applicable fire, smoke or accessibility requirements first.

Next step

Keep this project moving

Follow the measurement into the most useful related reference, calculator or project view.

Understand the inputDoor Sweep Stock Measurement GuideContinue →Related projectWeatherstripping CalculatorContinue →Browse this project typeInsulation & Sealing calculatorsContinue →

Planning guides

Understand the inputs behind this calculator

All guides →

Insulation & Sealing

Door Sweep Stock Measurement Guide

Measure compatible door-bottom widths and confirm stock length can cover each door before rounding a project to whole sweep units.

Read guide →

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