How many shingles for a shed roof?

Measure roof area, convert to squares, then to bundles—don’t forget waste and starter strips.

Shed roofs are usually simple, which makes shingle estimating easier than complex houses. The key is to estimate the actual roof surface area, not just the floor footprint.

Once you have roof area, convert to squares (100 sq ft) and then to bundles based on your shingle spec.

Step-by-step: shed shingle estimate

Measure roof length and sloped width (or calculate slope-adjusted width from pitch).
Compute roof area (length × sloped width) for each roof plane and add them up.
Convert area to squares (sq ft ÷ 100).
Convert squares to bundles (often ~3 bundles per square; confirm your product).
Add waste (often 10% for simple roofs; more for many cuts) and round up.

Practical tips

Starter strips, ridge caps, and underlayment are separate materials—plan them alongside shingles.
Low-slope roofs may require special products or installation methods—check manufacturer requirements.
If the shed has overhangs, include them in your measurements.
Buy a little extra for repairs; matching later can be difficult.

Want the fast estimate?

Use our roofing calculator and share a link that keeps your inputs.

Use the calculator