Shingle Calculator
Find out exactly how many shingles you need — bundles and individual shingles for the field, plus starter and ridge/hip cap — with U.S. pricing, a shingle-type comparison, and a downloadable PDF.
Shingle counts per bundle vary by product — always confirm on the wrapper. Prices use 2024-2025 U.S. figures. For planning purposes only.
| Shingle Type | Bundles | Shingles | Field Cost |
|---|
Field shingles only, for your 14.8 squares at typical U.S. counts & prices.
How to use the shingle calculator
Four quick steps turn your roof size into an exact shopping list — field bundles and individual shingles, plus starter and ridge cap — with U.S. pricing, a shingle-type comparison, and a downloadable PDF.
Enter your roof size
Type the building length × width and pick a pitch, or enter your true roof area directly.
Choose your shingle
Pick a shingle type — bundles per square, shingles per bundle, and price auto-fill for you.
Add starter, cap & cost
Set your eave/rake and ridge/hip lengths, plus optional install labor per square.
Read it & save a PDF
Get total bundles, field shingles, and a full cost breakdown you can download.
How the shingle count is calculated
Everything starts from your true roof area. Add waste, convert to roofing squares, then round up to whole bundles for the field, the starter course, and the ridge cap. Here is the exact math.
Worked example — 40 × 30 ft home, 6/12 pitch, architectural shingles
Roof area: 40 × 30 × 1.118 ≈ 1,342 sq ft
With waste: 1,342 × 1.10 ≈ 1,476 sq ft = 14.8 squares
Field: ⌈14.76 × 3⌉ = 45 bundles, 45 × 21 = 945 shingles
Starter: ⌈147 ft ÷ 105⌉ = 2 bundles | Cap: ⌈40 ft ÷ 25⌉ = 2 bundles
Total: 49 bundles (45 field + 2 starter + 2 cap) ≈ $2,540 in materials, about $172 / square.
Shingle coverage & cost charts
Handy lookups for the questions people ask most — bundles and shingles per square, bundles by roof area, how much waste to add, and typical U.S. costs. Everything follows from the roofing square: 100 square feet of roof.
| Shingle Type | Bundles / sq | Shingles / bundle | Notes |
|---|---|---|---|
| 3-tab asphalt | 3 | ~26 | Economical, flat, single-layer |
| Architectural | 3 | ~21 | The U.S. standard, dimensional |
| Designer / premium | 4 | ~16 | Heavy, textured, luxury look |
| Cedar shakes | 4 | n/a | Sold by the bundle, not counted |
Counts vary by brand and product line — always confirm bundles per square and shingles per bundle on the wrapper before ordering.
| Roof area | Squares (+10%) | Field bundles | Field shingles |
|---|---|---|---|
| 1,000 sq ft | 11.0 | 33 | 693 |
| 1,500 sq ft | 16.5 | 50 | 1,050 |
| 2,000 sq ft | 22.0 | 66 | 1,386 |
| 2,500 sq ft | 27.5 | 83 | 1,743 |
| 3,000 sq ft | 33.0 | 99 | 2,079 |
Field only — add separate bundles for starter and ridge cap. This is your true roof area (footprint × pitch multiplier), not the flat footprint below.
| Roof complexity | Waste | Examples |
|---|---|---|
| Simple gable | ~10% | Two planes, few penetrations |
| Moderate | 12–15% | Some hips, valleys, or dormers |
| Complex | 15–20% | Many hips and valleys, cut-up roof |
| Steep / intricate | 20%+ | Steep pitch with lots of cuts |
Waste covers offcuts, starter overlaps, and mistakes. More cuts mean more waste, so raise the percentage for anything past a plain gable.
| Component | Typical cost | Notes |
|---|---|---|
| Field shingles | $100–$180 / square | Materials only; premium lines cost more |
| Starter strip | $45–$60 / bundle | ~105–120 lf coverage per bundle |
| Ridge / hip cap | $50–$65 / bundle | ~20–35 lf coverage per bundle |
| Installation labor | $150–$400 / square | Varies by region, pitch, and tear-off |
Planning ranges only. Tear-off of the old roof, underlayment, flashing, and disposal are extra — get local quotes for a firm number.
A full shingle order is really three separate counts. The field is measured in squares; the starter and cap are measured in linear feet along the roof edges — so they are ordered independently.
- Field — the main slopes, priced by the square at 3 (or 4) bundles each.
- Starter — seals the eaves and rakes against wind uplift, by the linear foot.
- Ridge / hip cap — finishes the peaks and hips, also by the linear foot.
Everything the calculator works out
One roof, entered any way you like, comes back as a complete shopping list — for buying the right number of bundles the first time.
Key figures behind shingle estimating
Built for anyone buying shingles
From a weekend garage reroof to bidding a full job, the same calculator turns a roof size into the right number of bundles.
Reroofing a garage, shed, or small home and needs to know exactly how many bundles to buy.
- Enter size and pitch, get bundles
- Don’t forget starter and cap
- Add waste and one spare bundle
Turning a footprint into squares, bundles, and a materials price fast when pricing a job.
- Squares → field, starter & cap
- Set waste for roof complexity
- Read cost per square instantly
Comparing shingle types and weighing materials against labor before committing to a reroof.
- Compare 3-tab vs architectural
- Split materials from labor
- Save the PDF to shop quotes
7 tips for buying shingles
Small habits keep your bundle count right, whether you’re ordering for a whole reroof or a small repair.
Shingle calculator FAQ
The coverage, cost, waste, and material questions people ask most.
Most asphalt shingles are sold three bundles to a square, and a square covers 100 square feet of roof. Take your roof area, divide by 100 to get squares, then multiply by three, plus about 10% for waste.
A 2,000 square foot roof is 20 squares, or roughly 66 bundles once waste is added. On top of that, add separate bundles for the starter strip along the eaves and rakes and for the ridge cap along the peaks and hips.
A roofing square is 100 square feet of finished roof surface — a 10 by 10 foot area. It’s the standard unit roofers and suppliers use to price and order materials.
Your roof area in square feet divided by 100 gives the number of squares. A 1,600 square foot roof is 16 squares. Remember to size the sloped roof area, not the flat footprint, by applying the pitch multiplier first.
It depends on the product. Three-tab shingles run about 26 per bundle, architectural about 21, and heavier designer shingles around 16.
Three bundles of three-tab or architectural shingles cover one square. Always check the wrapper, since the exact count varies by brand and product line.
Most three-tab and architectural asphalt shingles are packaged three bundles per square, covering 100 square feet. Thicker designer shingles and cedar shakes often take four bundles per square because each piece is heavier and covers less.
The bundles-per-square figure is printed on the wrapper, so confirm it before ordering rather than assuming three.
Materials for asphalt shingles typically run about $100 to $250 per square, so a 20-square roof is roughly $2,000 to $5,000 in field shingles, starter, and ridge cap. Professional installation adds about $150 to $400 per square in labor.
Shingle type, region, tear-off of the old roof, and roof complexity all move the final number, so treat these as planning ranges and get local quotes.
Add about 10% for a simple gable roof and 15% or more for roofs with hips, valleys, dormers, or steep pitches, where more shingles get cut and trimmed. Waste covers offcuts, starter overlaps, and mistakes.
It’s also smart to keep one extra bundle of field and cap shingles after the job for future repairs and color matching, since lots and colors change over time.
Yes — both matter. Starter shingles run along the eaves and rakes to seal the first course and resist wind uplift and leaks. Ridge cap shingles cover the peaks and hips for a finished, weathertight edge.
Both are ordered by the linear foot: divide your eave and rake length by the starter coverage per bundle, and your ridge and hip length by the cap coverage per bundle, then round up.
Three-tab shingles are flat, single-layer, and economical, with a uniform look and a shorter lifespan. Architectural (or dimensional) shingles are thicker, layered, more wind-resistant, and longer lasting — they’re the U.S. standard today.
Both usually install at three bundles per square, but three-tab bundles hold more individual shingles (about 26 versus 21) because each piece is thinner.
General Estimating Notice: This calculator estimates shingle bundles and individual shingles for the field, plus starter and ridge/hip cap, from your roof size and shingle product, using standard coverage figures. Shingle counts per bundle and bundles per square vary by product — always confirm on the wrapper. Prices use 2024–2025 U.S. figures and exclude underlayment, flashing, tear-off, disposal, and permits. Order a little extra for waste and repairs, follow the manufacturer’s installation instructions, and take full safety precautions on the roof. For planning purposes only.