Settings
Use lower values to avoid frame bowing from overfilling.
Accounts for can switching, nozzle clogging, off-ratio, and trimming.
Presets are generic; check your product datasheet for exact yield.
Note Volumes are geometric approximations. Product expansion varies by temperature, humidity, and application technique.
Openings & Gaps
Enter each window/door opening: size, average perimeter gap thickness, and depth into the cavity.
| Label | Width | Height | Gap thickness | Gap depth | Qty | Perimeter | Volume |
|---|
Current input units
Width/Height: in, Gap thickness: in, Gap depth: in
Switch to cm/m if desired. Internally, calculations use inches.
Conversion reference
1 in = 2.54 cm
1 ft = 12 in, 1 m = 100 cm
1 L = 61.0237 in³, 1 ft³ = 1728 in³
1 ft = 12 in, 1 m = 100 cm
1 L = 61.0237 in³, 1 ft³ = 1728 in³
Total perimeter
0.00 ft
Total expanded volume
0.00 L
Cans required
0
Estimated cost
$0.00
Formulas used
- Perimeter (inches) = 2 × (Width + Height).
- Gap cross-section (in²) ≈ Gap thickness × Gap depth. Use average values.
- Gap volume per opening (in³) = Perimeter × Cross-section × Fill percentage.
- Total expanded volume (in³) = Sum of opening volumes × (1 + Waste%).
- Cans required = Total expanded volume ÷ Can usable volume (expanded). Round up.
All calculations assume uniform gaps. Adjust inputs if gaps vary by side.
How to use
- Select your measurement system.
- Set fill percentage and waste allowance appropriate for your technique.
- Enter each opening’s width, height, gap thickness, gap depth, and quantity.
- Enter the can usable volume (expanded) and price per can, or pick a preset.
- Review totals, then export CSV or export PDF for records and bids.
Example data table
| Label | Width | Height | Gap thickness | Gap depth | Qty | Perimeter (ft) | Volume (L) |
|---|---|---|---|---|---|---|---|
| Window 3'×4' | 36 in | 48 in | 0.5 in | 1.0 in | 4 | 112.0 | 7.48 |
| Door 3'×6'8" | 36 in | 80 in | 0.375 in | 1.0 in | 2 | 38.7 | 1.85 |
| Picture Window 5'×4' | 60 in | 48 in | 0.5 in | 1.25 in | 1 | 18.0 | 2.21 |
Example volumes assume 80% fill and include no waste. Your results may vary.
FAQs
Yield varies by temperature, humidity, substrate temperature, dispensing technique, and how much you allow the foam to expand. Always check your product datasheet and use a reasonable waste allowance.
No. Overfilling can bow frames. Many installers target 50–85% fill and apply in passes. Use low-expansion products intended for windows and doors.
Use your average gap thickness as “bead width” and the backer-depth or cavity depth as “gap depth.” If sides vary, average them or split one opening into multiple rows.
Yes. Switch to metric to enter cm-based dimensions. The calculator converts internally and returns outputs in both liters and feet/meter where relevant.
Brands use different expansion assumptions and bead geometry. This tool is transparent and adjustable so you can align assumptions with your field practice and product choice.