| Shape | Dim A | Dim B | Dim C | Area |
|---|
| Opening | Length | Width | Area |
|---|
| Panels area | 0 |
|---|---|
| Openings area | 0 |
| Net area | 0 |
| Waste added | 0 |
| Total area (with waste) | 0 |
| Sheet/Roll area | 0 |
| Sheets/Rolls needed | 0 |
| Estimated seams length | 0 |
| Adhesive required | 0 |
| Estimated material cost | 0 |
Example data
| Section | Shape | Dim A | Dim B | Dim C | Notes |
|---|---|---|---|---|---|
| Cockpit center | Rectangle | 2.1 | 1.2 | — | Flat panel |
| Aft step | Triangle | 0.7 | 0.5 | — | Right triangle (base×height/2) |
| Forward taper | Trapezoid | 1.4 | 0.9 | 0.4 | Top width, bottom width, height |
| Hatch cutout | Opening | 0.45 | 0.35 | — | Subtracts area |
Formulas used
- Rectangle area = A × B
- Triangle area = (A × B) / 2 (base × height)
- Trapezoid area = (A + B) / 2 × C (top + bottom) / 2 × height
- Net area = Σ(Panel areas) − Σ(Opening areas)
- Waste added = Net area × Waste%
- Total area = Net area + Waste added
- Sheet area = Sheet length × Sheet width
- Sheets needed = ceil( Total area ÷ (Sheet area × Efficiency) )
- Estimated seams ≈ Total area ÷ Plank/Roll width
- Adhesive required = Total area × Coverage (units depend on system)
How to use this calculator
- Select your unit system and set a reasonable waste percentage.
- Add deck Panels using shapes that approximate each area. Use trapezoids for tapered sections.
- Add Openings for hatches or drains to subtract coverage.
- Choose a material, thickness, sheet/roll size, layout efficiency, plank/roll width, and adhesive coverage.
- Press Calculate. Review net area, sheets required, seams, adhesive, and cost.
- Use Load example to see realistic inputs. Adjust values to match your boat.
- Download CSV for estimating or PDF for shop records and approvals.
Tip: Efficiency below 0.8 is typical for complex curves. Increase waste if seams must align with plank patterns.
Notes & Validation
- Dimensions are assumed clear of radius corners unless modeled inside waste.
- Seam estimate is approximate; pattern matching can increase seam length.
- Adhesive units: SI uses liters per m²; US uses gallons per 100 ft².
- Costs exclude trims, caulk, fasteners, and labor.
Presets
FAQs
How do I measure curved or irregular sections?
Break each section into rectangles, triangles, or trapezoids. For sweeping curves, measure chords and heights, or make a cardboard template. Use lower efficiency (0.75–0.85) to reflect trimming. Confirm dimensions onboard before ordering materials.
What unit and conversion rules does the tool follow?
Choose SI for meters and square meters, or US for feet and square feet. The calculator converts lengths and areas automatically. Adhesive coverage units adjust with the system. Results display using the selected labels.
What should I enter for layout efficiency?
Start near 0.85 for typical cockpit panels. Use 0.60–0.75 for complex tapers, tight radii, or strict plank alignment. Increase toward 0.95 when panels are rectangular and repeatable. Efficiency multiplies sheet area to estimate practical yield.
How is adhesive coverage interpreted?
In SI, enter liters per square meter. In US, enter gallons per 100 square feet. The result is total adhesive needed for bonding the flooring. Always verify manufacturer recommendations for spread rates, substrates, temperature, and open time.
Which material thickness should I choose?
Six‑millimeter EVA suits most cockpits for grip and comfort. Four‑millimeter vinyl is lighter and easier over large rolls. Nine to twelve millimeter plywood offers stiffness for structural panels. Consider weight, drainage, fasteners, and hatch clearances before deciding.
How do seams and plank width affect estimates?
Seam length is approximated as total area divided by plank or roll width. Pattern matching, borders, and hatch frames increase seams and waste. Adjust plank width and efficiency to reflect expected layout style.
Can I include hatches, drains, and margins?
Yes. Add each hatch or drain as an opening to subtract area. For perimeter margins, either model them as openings or increase waste percentage. Review clearances around hinges, latches, scuppers, and fasteners before cutting.