Best Tool to Calculate Roof Area from Google Maps

Use Mapulator App, an accurate roof measurement tool, to calculate roof area of your roof.

Before you begin work on any roofing project, it is vital to have an accurate measurement tool to calculate roof area of your roof. Calculating the roof area is a crucial step in any construction project. It serves as the foundation to calculate roof material quantities and costs accurately. By determining the roof area, you can ensure efficient planning and avoid unnecessary expenses. In this article, we will explore the process of calculating roof area and its significance in construction projects.

6 Common Types of Roofs

Roof construction it might be roof is essential part of a building, without it buildings are not considered as complete. Roofs come in various types, each with its own distinct characteristics. Understanding the different roof types is essential when calculating roof area. Here are some common types of roofs:

  1. Gable Roof: A gable roof is characterized by two sloping sides that meet at a central ridge. It forms a triangular shape and is one of the most common roof types used. Gable roofs are relatively easy to calculate because as their shape allows for straightforward measurements.
  2. Hip Roof: A hip roof has slopes on all sides which forms a gentle slope from the top to the eaves. Unlike gable roofs these hip roofs do not have vertical ends. They are more complex in design and therefore it requires additional calculations to determine the roof area accurately.
  3. Flat Roof: As the name suggests, a flat roof has little to no slope, creating a horizontal surface. Although it appears flat, it usually has a slight incline for drainage purposes. Calculating the roof area of a flat roof involves measuring its length and width.
  4. Mansard Roof: The mansard roof features two slopes on all four sides, with the lower slope being steeper than the upper slope. This design maximizes usable space in the attic or upper levels of the building. Determining the roof area of a mansard roof requires measuring the length and width of each slope separately.
  5. Gambrel Roof: Commonly found in barns or colonial-style homes, a gambrel roof combines elements of both a gable and mansard roof. It has two sides with two different slopes on each side. Calculating the roof area of a gambrel roof involves measuring the length and width of both the upper and lower slopes.
  6. Shed Roof: A shed roof is a single-sloping roof with a steeper slope on one side. It is often used for smaller structures, such as sheds or extensions. Calculating the roof area of a shed roof requires measuring its length and width which is similar to a flat roof.

These are just a few examples of the many roof types you may encounter. Each roof type has its own considerations when it comes to calculating the roof area accurately. Understanding the specific characteristics and measurement techniques for each roof type is crucial for obtaining precise calculations. More complex the designs more difficult it will to calculate roof size.

Measuring Roof Dimensions

Accurate measurements are fundamental when calculating the roof area. To measure the dimensions of a roof, start by determining the length and width. Measure from the eaves to the ridge for the length and from one gable end to the other for the width. Additionally, account for overhangs and slopes as they can affect the overall roof area.

How to Calculate Roof Area

The formula for calculating the roof area varies depending on the roof shape. For gable roofs, use the formula: area = (length × width) + 0.5 × (length × overhang). In the case of hip roofs, the formula is: area = (length × width) + 0.5 × (length × overhang) + 0.5 × (width × overhang). For flat roofs, the calculation is simpler: area = length × width. Applying the appropriate formula ensures accurate roof area calculations.

Different roof designs will have different ways of calculations. Accurate measurement tools will always help you get the estimation of roofing cost per square foot.

Easy Way to Calculate Roof Area

Let’s see one of the simple method using mapulator app.

Method: Tap on the map and draw points

  • Step 1: Open the Mapulator app then click on create a new project option.
  • Step 2: Click on the gear icon at the top right corner of the screen to access the settings menu. then you can choose the appropriate map type, area unit, distance unit, line color and fill color. Once you have made your selections then click the back arrow button at the top left corner to go back to the main screen.
  • Step 3: Choose the add selector on the tool and select the region where you want to measure area on map and click on done.
  • Step 4: Use the layers option present above the done option.
  • Step 5: Mapulator will Join the first and last point you added to calculate area on map for you.

For additional methods, please read about various methods of measuring the area on the map.

Dealing with Complex Roofs

In some cases, roofs may have irregular shapes or consist of multiple sections. To calculate the area for complex roofs, break them down into smaller, manageable sections. Calculate the area of each section separately using the appropriate formula for its shape. Sum up the areas of all sections to obtain the total roof area.

Roof Measurement Tools and Resources

Several tools and resources are available to assist in calculating roof area, including online calculators and mobile apps that streamline the process. If you’re looking for an app to measure your roof online then we recommend using the Mapulator app. It allows you to easily measure a roof on Google Maps which makes it convenient for anyone using a mobile device.

Calculate Roof Area Before
Image 1: Before
Calculate Roof Area After
Image 2: After

As you can see in the above images Mapulator app will help you measure your roof online anywhere using maps and also gives you simple roof measurement reports on screen for quick reference. Using various online tools help you to calculate roof size, height, angle, pitch, shingles and materials needed to build and complete the roofing project.

However, for utmost precision, it is advisable to consult professional roofers. They possess the expertise and specialized tools to ensure accurate measurements for your roofing project.


Accurately calculating the roof area is vital for any construction project. It enables you to estimate material requirements, plan effectively, and control costs. By following certain measurement techniques and utilizing the appropriate formulas, you can ensure precise roof area calculations. If you’re looking for a roof estimate near me or searching for roof measurement companies, take advantage of available roofing calculator tools and resources like Mapulator app, but don’t hesitate to seek professional guidance when needed. With right roofing calculator and accurate roof area measurements, you can proceed with your construction project confidently and efficiently.