Roofing Calculator - Estimate Your Roofing Costs
This tool is designed to estimate the cost of any residential roof replacement or new construction project. Your total cost will vary with the choice of materials, ground dimensions input, roof pitch, and overall complexity of the roof in question.
Please note: Any roof figures obtained with our calculator reflect hiring a skilled crew with a solid reputation, verifiable work references, and an ample experience in the field. The calculator assumes that the company you hire will have all the necessary tools and equipment, general liability insurance, and workers' compensation for all of the installers working on your project. Prices rendered apply to the North Eastern region of the U.S, and may require substantial adjustment for other parts of the country.
March, 2015 Update: We are pleased to announce that we've just updated the calculator's pricing data with the latest national figures. We've also added three more types of roofing systems to the calculator giving you a wide plethora of options! For instance, you can now estimate the difference in cost of architectural (also known as dimensional, laminated or composition) shingles VS. the most basic 3-tab asphalt shingles, installed.
Many of our site visitors have requested a calculator that can also estimate roofing materials including bundles of shingles necessary for a specific project, along with the cost of materials required for the job. We did not have such a tool readily available, but after a little bit of digging and research we have developed it! Our new materials and area calculator can be accessed here. - Let us know if you find it useful.
How to use our Calculator:
1. You need to input the length and width of the section of the roof you want to estimate. The length and width of the roof are measured in feet. If use a metric system where you live, you can always convert meters to feet to get the proper dimensions to perform the calculations based on the length and width measured in feet.
2. Select an appropriate roof pitch from the pitch menu.
3. Take a look at your roof, and ask yourself, "How complicated is my roof"? If it is a simple gable type roof, then your roof can be considered a simple one. But, if there are a few sky-lights, some dormers, or even a roof tower or two, then your roof is a complex one. Make an appropriate selection in the roof difficulty menu.
4. Select the type of materials you would like to use. You will find that your final roof estimate pricing will vary with the choice of materials selected. - It gives you an easy way to compare the cost of many different roofing systems.
5. How many existing layers of shingle are there on your roof currently? If you have two or more layers on your roof, then a complete Tear Off, and roof deck inspection of your existing roof is required.
What it means: The bottom line calculated based on your inputs, gives you a reference point of how much it would cost to install a new roofing system on a building similar to yours in one of the states in the North Eastern Region.
Pricing Assumptions & Other Important Considerations: The estimated pricing assumes that your new roof will be installed by a professionally certified and experienced company that employs the correct industry practices and adheres to all state and local regulations for contractors.
To get started, grab a 100 ft. tape measure and obtain accurate ground measurements of the sides of your roof. In other words, you need to simply measure the length and width of the building, over which the roof is seated.
The easiest way to obtain accurate roof measurements, is to walk around the house and take ground measurements right underneath the roof. Keep in mind that your roof will usually overhang / extend away by a foot from the walls of the house. Thus, you will want to use the actual edges of the eaves/overhangs of the roof, as a starting and ending reference point for taking your measurements. You can sketch a simple diagram of your roof to minimize errors and make the measuring process easy. Take a look at the example of the roof sketch below to see exactly what you'll need, and how easy it can be:
Do not use the walls of the building alone when taking roof measurements, because this will throw your numbers off. Have a pen and a paper ready to write down length and width of all sections of the roof, or ground dimensions of all sections of your roof. All measurements will be taken in feet.
Now that you have the ground dimensions of your roof, it is time to estimate your roof pitch, also known as roof slope. It tells you how steep your roof is. The question many people will ask, is "How do I figure out the roof pitch from the ground?". You can estimate a roof's slope in several different ways; go to your local hardware store, and buy a pitch meter for estimating roof slope from the ground. Another way to do it is very simple; take a look at your roof, and ask yourself "Is it possible to walk on this roof with ease?". If the answer is yes, then your roof pitch is low or walkable. Thus, you would select "low" in the roof pitch selection field. If it looks like you could kind of try to walk up the roof, but you would be taking chances, then your roof slope is medium. Finally, if walking on the roof seems dangerous or impossible, then your roof is steep and non-walkable.
Now that we have figured the roof pitch, it is time to determine the type of the roof in question. - To do this, simply look at your roof and count the number of sides that it has:
Selecting the Materials:
In order to help you better understand the numbers involved in estimating a roof, we have included both, regular or commonly used materials such as composition shingles and EPDM rubber, along with the premium materials such as slate, clay tiles, cedar shakes, and metal roofing available as one of the possible options in the material selection field of the calculator.
Commonly used material for slopped roofs are composition/asphalt shingles, which, by the way, has many different grades and ratings of its own. For flat and low-slope roofs, conventional systems are EPDM rubber, PVC, TPO, modified bitumen, and Built-up roof (BUR) also known as tar and gravel.
The materials choices provided above represent typical/non-premium materials that are often installed on residential roofs and commercial buildings in the US. If you are interested in a premium roofing system, then you are probably considering Slate, Clay Tiles, Cedar Shakes, and Metal. For your convenience, we have included all four of these premium roof types in our calculator.
Any premium roof system installation is a highly specialized job requiring a special skill set, tools, and experience installing a given system. No matter what company you decide to hire, make sure that the contractor in question, is actually capable and has the necessary experience installing the type of a roofing system you are interested in. Be sure to ask for references and check out the actual work the contractor has done. - I would highly recommend that you actually do your due-diligence and take the time to go out and look at their work, talk to the owners, and ask lots of questions. to see if the homeowners are actually truly happy with their new roof and services they have received.
Important Geographic Effects on Costs to Keep in Mind:
If you are located in a different part of the country, then your local pricing may be lower or higher depending on your geographic location. For instance, you will generally find lower roof installation prices in most Mid-Western states and in the South, while North Eastern Region, and West Coast will typically have higher labor costs for a similar type of the roof replacement project.
All the figures aside, keep in mind that materials such as Natural Slate, and Clay Tiles are very heavy and may require additional reinforcement of the existing roof structure and trusses. Consider a light-weight and energy efficient alternative such as metal roofing that can offers the look of Slate or Tiles at a fraction of the weight, and at a lower cost.