Shingle Calculator for Shed Roof

Input Shed Roof Details

Shed length

Shed width

Unit

Roof style

Gable calculates ridge cap separately; single slope skips ridge caps.

Pitch rise

per

Pitch run

units

Example: 4 in 12.

Eave overhang (each side)

Same unit as shed size.

Rake overhang (front/back)

Bundle coverage (sq ft)

Ridge bundle coverage (ft)

Waste allowance (%)

Price per bundle

Price per ridge bundle

Nails per square

Adjust for manufacturer instructions.

Calculation Summary

Enter your shed dimensions, select roof style, pitch, overhangs, bundle coverage, and costs to see detailed shingle quantities, ridge cap requirements, nails, and total material budget.

Example Data Table

Shed Size (ft)	Pitch	Roof Style	Waste (%)	Approx. Bundles
8 × 10	4/12	Gable	10	5
10 × 12	6/12	Gable	10	7
12 × 16	5/12	Single-slope	12	10

Example counts are indicative only; always run exact inputs for your shed.

Formula Used

Convert units: all dimensions are converted to feet for calculation.
Overhangs: total length = length + 2 × rake overhang;
total width = width + 2 × eave overhang.
Slope factor: √(1 + (rise / run)²).
Roof area (no waste): total length × total width × slope factor.

Waste applied: area × (1 + waste% / 100).
Squares: area with waste ÷ 100.
Main bundles: ceiling(area with waste ÷ bundle coverage).
Ridge bundles (gable): ceiling(ridge length ÷ ridge bundle coverage).
Nails: squares × nails per square.
Cost: bundles × prices for main and ridge materials.

How to Use This Calculator

Measure shed length and width along the outside walls.
Select feet or meters and choose gable or single-slope style.
Enter roof pitch as rise over run (for example, 4 over 12).
Add typical eave and rake overhangs you plan to build.
Confirm bundle coverage from your shingle packaging and waste percentage.
Optionally enter prices per bundle and ridge bundle for cost estimates.
Click “Calculate” to get roof area, bundles, ridge caps, nails, and cost.
Use CSV or PDF buttons to export results for ordering or records.

How to Measure a Shed Roof for Shingles

Measure the shed length and width at the outside walls.
Measure planned eave and rake overhangs and add them to each side.
Confirm roof pitch (rise over 12) using a level and tape.
For gable roofs, calculate each side separately; for lean-to, one plane.
Multiply adjusted length × width × slope factor to get roof area.
Add a waste percentage for cuts, staggering, and starter courses.

How to Apply Shingles to a Shed Roof

Install clean sheathing, drip edge, and underlayment according to code.
Lay starter strip along eaves, overhanging drip edge slightly.
Run first course following manufacturer exposure and nail pattern lines.
Stagger joints each row, maintain straight lines using chalk guides.
Flash walls, chimneys, and penetrations carefully to avoid leaks.
Finish with ridge caps on gable roofs, sealing all exposed nails.

How Many Shingles Do I Need for a 8x8 Roof

For a typical 8×8 gable shed with a moderate pitch, using bundles covering about 33.3 sq ft and 10% waste, you usually need around 3 bundles. Always confirm using this calculator with your exact pitch and overhangs.

How Many Shingles Do I Need for a 10x14 Shed

For a simple 10×14 gable shed, moderate pitch, similar coverage, and about 10% waste, you typically need around 5 bundles. Enter your precise dimensions, slope, and bundle coverage here for accurate results.

FAQs – Shingle Calculator for Shed Roof

How accurate is this shed shingle calculator?

It uses your exact dimensions, pitch, overhangs, bundle coverage, and waste to estimate bundles and cost. Results are highly practical, but always confirm against manufacturer coverage charts and local code or supplier recommendations.

Can I use this tool for metric measurements?

Yes. Select meters, enter shed size, overhangs, and pitch normally. The calculator converts everything to feet internally and outputs shingle quantities without you needing separate manual conversions.

Does it include ridge cap shingles for all roofs?

Ridge cap bundles are calculated automatically for gable shed roofs based on ridge length and selected ridge bundle coverage. For single-slope designs, ridge bundles are skipped because there is no central ridge to cover.

What waste percentage should I choose?

For simple square sheds, 7–10% waste often works. For higher pitches, complex layouts, valleys, or heavy cutting around features, consider 12–15% or more to avoid running short on bundles mid-project.

Are starter strips and drip edge included?

Starter strips and metal drip edges are not directly added as separate line items. However, the waste factor typically covers extra starter courses and trimming; always verify counts against your preferred installation method.

Can I use this for house roofs or only sheds?

The math works for small house roofs too, but this tool is tuned for simple shed-style layouts. For complex homes with valleys, dormers, or multiple sections, use a detailed roofing takeoff or professional estimate.