The roofing materials calculator will help you estimate the amount of roofing materials you will need to purchase to replace your roof, as well as provide current pricing for these roofing materials. Right now, the roof prices will be calculated for asphalt shingles roof only, with metal roofing materials’ prices to follow soon.

Calculate roofing materials and prices now:

Roofing Materials Calculator – To calculate your roof size, roofing materials and costs, measure your roof and plug in your measurements in accordance with the diagram on the right.

Roof Length: Roof Width (Gable Side): Roof Pitch: Roof Type: Gable Roof Hip Roof Mansard Roof

– Roof area and roofing materials prices will appear below.

Free Roofing Estimate - Roofing Contractors in Your Area – Get up to 4 quotes.

Roofing Materials Calculator update – 8/14/2011: – we have updated this roofing calculator to reflect rising roofing prices that have take place in the past year.

One big thing we need to mention – we switched prices of roofing materials form GAF Timberline 30 year architectural shingles to Owens Corning Oakridge 30 year laminated asphalt roofing shingles. Reason for this is that we used Home Depot’s website to pull prices of roofing materials, so that everyone could confirm these prices. However Home Depot does not publish roofing material prices any more (or we could not find them, but I searched for 15 minutes, using various search terms and looking through many roofing categories). We have now switched to Lowe’s website for publicly available costs of roofing shingles.

Change in Roofing Prices: The cost of 30-year laminated roofing shingles went up from $27.95 per bundle to 33.75 per bundle (you will need 3 bundles for each roofing square or 100 sq. ft. of roof area). That is almost $6 per bundle or $18 per square increase in roof cost. Other small changes were made to the roofing accessories costs, ranging about 5%.

Check out our other roofing calculator tools:

• Roof Calculator – estimates roofing installation cost (what roofing contractors will charge) for all major types of roofing materials, based on your roof size, roof pitch, roof difficulty, number of roof openings (chimney and skylight flashings) and other details.
• Roof Pitch Calculator – calculate roof pitch based on your roof size, length of the gable and roof rise.
• Metal Roof Calculator – estimates metal roof installation prices for Standing Seam Metal Roof, Metal Shingles, Stone Coated Steel Roofs, as wells as Tin, Copper and Zinc roofs.




• Roof Pitch – not a calculator, but a helpful guide to measure and calculate roof pitch using level and measuring tape, as well as “guesstimating” method. Roof pitch is used by most of our roofing calculator tools, as it directly affects the roof size measurements. It is very important that you use the correct roof pitch if you want to get accurate roof measurements.

Roofing Materials Calculator features:

This roofing materials calculator will calculate the exact amount of roofing materials that you will need to install a new roof. You will get measurements and current roof prices for the following roofing materials and roof accessories:

• Roofing materials – roofing shingles, metal roofing panels, or other types of roof materials, based on squares or bundles.
• Roofing Underlayment – Ice and Water shield, felt (tar paper) and or synthetic underlayment.
• Ridge / Hip Caps – ridge cap shingles (for asphalt and some metal roofing systems, and ridge / hip cap sections for standing seam metal roofs and slat roofs.
• Ridge Vent – length and price of Cobra or similar ridge ventilation system. Not all roofs will need it, but it is highly recommended to use ridge vent system along with soffit vents, which will extend the life-span of your roof and help prevent ice dams, along with adequate roof ventilation / attic insulation and Ice & Water Shield installed along the eaves of your roof.
• Roofing Accessories – roofing nails (1 box / bucket of coil roof nails for roofing guns or hand nails), pipe vent flashing (3 pieces), step flashing (100 count), and roofing caulk (3 tubes of Solar Seal 900).
• Drip Edge – number and cost of 10 foot sections of drip edge.

All prices and materials calculations include waste and are rounded up to the exact amount of what you will need to install a roof, with minimal left over roofing materials. For example, the ridge vent usually comes in 20 feet rolls, so if you have 25 feet of ridge vent opening, the calculator will price two rolls.

How to use the roofing materials calculator:

To get the most accurate results when you are estimating roofing materials cost, it is neccessary to accurately measure your roof and roof pitch – refer to our roof measuring guide, which will walk you through the steps needed to get the most accurate roof measurements. After you’ve measured the roof and got a more or less accurate roof pitch measurement, plug those numbers into the calculator fields, making sure that your gable side is the width of your roof – this is important only if you have a gable roof. If you have a hip or mansard roof, this will not be important. If you are unsure which roof type you have, refer to our roof types guide.

After you entered your roof dimensions and other info needed, press the “calculate roofing materials” button, and the results will appear below, in the same window. On the right you will see dimensions and amounts of needed roofing materials, and on the left you will see the prices for each type of roofing materials.

Note that we are using standard waste factor for gable and hip / mansard roof types. Waste factor for gable roof is 5% and for hip / mansard roof it is 7.5%, which is approximately what you will see in the real world roof installation, unless you pick up and save every piece of shingle that you cut off on the roof ends. On a hip roof, you cant really avoid waste, as you need to cut off corners of shingles or metal roof panels on roof ends.

Roofing Prices

All asphalt shingles roof prices are calculated based on current prices from Home Depot website. These prices are approximately what roofing supply would charge a roofing contractor, so there won’t be much difference between what you or a roofing contractor will pay for roofing materials. If you are having a roof installed by a professional roofing contractor, learn how they come up with their costs in our roofing prices guide. By using this roofing materials calculator, you’ll be able to see how much the roofing materials cost, and how much of your total roof price goes to labor, overhead and profit of the roofing contractor.

Roofing Materials Resources:

Roofing Directory – lists roofing resources, including roof information sites, roofing forums, roofing materials categorized by the type of roof application (sloped roofs, flat roofs, metal roofing / roofing shingles, etc.), as well as local roofing contractors.

Asphalt Shingles Roofing – learn about different types, manufacturers and installation techniques of roofing shingles – the most popular type of residential roofing.

Metal Roofing Materials – Standing Seam Metal Roofs, Metal Shingles and other types of metal roofing. Discover the pros and cons of metal roofing and research metal roofing prices.

with 5 comments