Roofing Material Calculator
Build a complete shingle-roof shopping list — field shingles, underlayment, starter strip, ridge/hip cap, drip edge, and nails — with an itemized bill of materials, U.S. pricing, and a downloadable PDF.
Quantities are estimates — confirm coverage on the actual product labels and measure your own eaves, rakes, and ridges. Prices use 2024-2025 U.S. figures. For planning purposes only.
| Shingle Type | Bundles / Sq | Bundles | Field Cost |
|---|
Field shingles only, for your 14.8 squares at typical U.S. bundle prices.
How to use the roofing material calculator
Four quick steps turn your roof size into a complete bill of materials — field material, underlayment, ridge cap, starter, drip edge, and fasteners — for any roofing type, with U.S. pricing, a material comparison, and a downloadable PDF.
Enter the roof
Type your roof area or squares directly, or enter the footprint and pitch to work it out first.
Pick the material
Asphalt shingles, metal, wood, tile, or slate — coverage and fasteners update to match.
Add accessories & waste
Include underlayment, ridge, starter, drip edge, and nails; set the waste % and prices.
Read results & save a PDF
Get every material and count, a full cost breakdown, a material comparison, and a shopping list.
How the material estimate is calculated
It starts from your roof area in squares, adds waste, then converts to the field material you chose and layers on every accessory a real roof needs. Here is the exact math behind each output.
Worked example — a 2,000 sq ft roof in architectural asphalt shingles, +10%
Squares: 2,000 × 1.10 ÷ 100 = 22 squares
Shingles: 22 × 3 = 66 bundles
Underlayment: 22 ÷ 4 = 5.5 → 6 rolls | Nails: 22 × 2.5 ≈ 55 lb
Plus starter, ridge cap, drip edge, and flashing by the linear foot.
≈ 66 bundles + 6 underlayment rolls + ~55 lb of nails, plus edge and ridge trim, for a 22-square roof.
Roofing material charts
Handy lookups for the questions people ask most — how materials compare, field material by roof size, and the accessories every roof needs. Figures use the calculator’s defaults (+10% waste, 3 bundles/square), so always confirm your own product.
| Material | Sold as | Weight / square | Lifespan | U.S. cost / square |
|---|---|---|---|---|
| 3-tab asphalt | 3 bundles / square | ~230 lbs | 15–20 yr | $80–$120 |
| Architectural asphalt | 3 bundles / square | ~350–430 lbs | 25–30 yr | $100–$200 |
| Metal (standing seam) | Panels | ~50–150 lbs | 40–70 yr | $300–$1,000 |
| Wood shakes | ~4 bundles / square | ~300–400 lbs | 30–40 yr | $400–$700 |
| Concrete / clay tile | By piece | ~600–1,000 lbs | 50–100 yr | $300–$1,000 |
| Slate | By piece | ~800–1,500 lbs | 75–100+ yr | $600–$1,500 |
Weight matters as much as cost: metal is the lightest and tile and slate the heaviest, often needing a reinforced roof structure. Longer-lived materials cost more up front but less per year.
| Roof area | Squares | Bundles | Underlayment | Nails |
|---|---|---|---|---|
| 1,000 sq ft | 11 | 33 | 3 rolls | ~28 lb |
| 1,500 sq ft | 17 | 51 | 5 rolls | ~42 lb |
| 2,000 sq ft | 22 | 66 | 6 rolls | ~55 lb |
| 2,500 sq ft | 28 | 84 | 7 rolls | ~70 lb |
| 3,000 sq ft | 34 | 102 | 9 rolls | ~85 lb |
Bundles = squares × 3; underlayment at ~4 squares per felt roll (synthetic covers more); nails at ~2.5 lb per square. Add ridge, starter, and drip edge by the linear foot for your roof’s edges.
| Component | Where it goes | Measured by | Typical coverage |
|---|---|---|---|
| Underlayment | Whole deck | Squares | ~4 sq/roll (felt), ~10 (synthetic) |
| Ice & water shield | Eaves & valleys | Linear ft | ~1.5–2 squares/roll |
| Starter strip | Along eaves | Linear ft | ~100–120 lin ft/box |
| Ridge cap | Ridges & hips | Linear ft | ~20–35 lin ft/bundle |
| Drip edge | Eaves & rakes | Linear ft | 10 ft/piece |
| Fasteners | Whole roof | Per square | ~2.5 lb nails/square |
Field material is only part of the order. These accessories, plus wall and chimney flashing and ridge vent, make the roof weather-tight — leaving them off is the most common estimating miss.
| Line item | Typical U.S. range | What moves it |
|---|---|---|
| Asphalt shingles | $100–$200 / square | 3-tab vs. architectural, brand |
| Underlayment | $5–$15 / square | Felt vs. synthetic |
| Ridge, starter & drip edge | $1–$4 / linear ft | Product and profile |
| Fasteners & flashing | ~$5–$15 / square | Nails, screws, valley & step flashing |
| Installed roof | $350–$600+ / square | Material, tear-off, pitch, region |
2024–2025 U.S. ballparks. Accessories add up beyond the field material, so a full bill of materials is what makes bids comparable. Your local prices will vary.
& ice / water
& starter
& nails
A complete roof is a system, not just the shingles you see. Under and around the field material sits a whole list of parts the calculator counts for you.
- Underlayment & ice/water — cover the whole deck, with extra protection at eaves and valleys.
- Drip edge & starter — metal edge and a starter course run along the eaves and rakes.
- Ridge cap & fasteners — caps finish the peaks and hips, and the right nails hold it all down.
Everything the calculator works out
One roof size gives you a complete bill of materials — the field material, every accessory, and a costed comparison across roofing types.
Key figures every roofing order depends on
Built for any roofing order
From a shed re-roof to a full house in a new material, the same calculator builds the whole bill of materials.
Re-shingling a garage or house and wants every material counted, not just the bundles, before ordering.
- Enter squares or footprint + pitch
- Don’t forget starter and ridge cap
- Match nails to the shingle spec
Building material lists fast and needs field, accessories, fasteners, and labor per square in one place.
- Set waste for hips and valleys
- Add per-square labor
- Save the PDF material list for the quote
Weighing asphalt against metal or tile and wants the count, weight, and cost of each side by side.
- Compare weight before switching
- Check lifespan against cost
- Confirm the structure suits tile or slate
7 tips for a complete roofing order
Small habits keep your bill of materials complete and your roof weather-tight, whatever material you choose.
Roofing material calculator FAQ
The material counts, accessories, weight, and U.S. cost questions people ask most before ordering a roof.
Start from your roof area in squares (one square is 100 sq ft), add waste, then convert to whichever field material you’re using and add the accessories every roof needs.
A 2,000 sq ft roof with 10% waste is about 22 squares. In architectural asphalt that’s roughly 66 bundles, plus underlayment, starter strip, ridge cap, drip edge, and fasteners.
Most asphalt shingles come three bundles to the square, which is 100 sq ft of roof. So a 22-square roof needs about 66 bundles.
Always check your specific product, since some heavy architectural and designer shingles run four bundles per square. Buy by the square once waste is included and keep the bundles from one production run for color match.
Field shingles are only part of the order. Every roof also needs underlayment over the whole deck, ice-and-water shield at the eaves and valleys, a starter strip along the eaves, ridge cap over the peaks and hips, drip edge at the eaves and rakes, and the right fasteners.
Flashing at walls, chimneys, and penetrations, plus ridge vent for attic airflow, round out the list. Leaving these off is the most common way a material estimate comes up short.
Weight and lifespan vary enormously. Asphalt shingles weigh about 230 to 430 lbs per square and last 15 to 30 years; metal is light at roughly 50 to 150 lbs and lasts 40 to 70 years.
Wood shakes are about 300 to 400 lbs and last 30 to 40 years, while clay and concrete tile run 600 to 1,000 lbs and slate 800 to 1,500 lbs, lasting 50 to 100 years. Heavy materials often need a reinforced roof structure.
Underlayment covers the whole roof deck, so you need at least as much as your roof area plus a little overlap. Divide your squares by the roll’s coverage and round up.
Felt rolls commonly cover about 4 squares each, while many synthetic rolls cover 10 squares. Add ice-and-water shield separately along the eaves and in the valleys, where codes in cold climates often require it.
Starter strip runs along every eave, and ridge cap covers every ridge and hip, so both are measured in linear feet. Measure those edges and divide by the product’s coverage per bundle or box.
A bundle of hip-and-ridge shingles typically covers about 20 to 35 linear feet, and starter comes by the linear foot too. These trim pieces are easy to forget but essential for a weather-tight, finished roof.
Asphalt shingles use about four nails each in normal conditions, and six in high-wind zones, which works out to roughly 2.5 lbs of roofing nails per square.
A 22-square roof needs about 55 lbs of nails. Metal and tile use their own screws or clips instead, so match the fastener to the material and follow the manufacturer’s nailing pattern for the warranty to hold.
In the U.S., asphalt shingle materials run roughly $100 to $200 per square, metal about $300 to $1,000, wood shakes $400 to $700, tile $300 to $1,000, and slate $600 to $1,500 per square.
Accessories such as underlayment, drip edge, and fasteners add to the total, and installed prices are much higher once tear-off and labor are included. Get local quotes, since material and region drive the number.
General Estimating Notice: This calculator builds a roofing bill of materials from your roof area or squares, material type, accessories, waste, and the prices you enter, using typical 2024–2025 U.S. figures. Coverage, bundle counts, weights, and fastener needs vary by product and manufacturer, and ridge, starter, drip edge, ice-and-water, and flashing depend on your roof’s specific edges and features. Heavy materials such as tile and slate may require a structural review. Always confirm quantities against product data sheets and local code before ordering, and take all safety precautions when measuring. For planning purposes only.