# Siding Calculator – James Hardie – Board / Siding / Lap Calculator Online

Nathan Clark | 🗓️Modified: February 25, 2024 | ⏳Time to read:9 min

Here’s our free online Siding Calculator that helps you get the total number of siding boards (Fiber Cement / Engineered Wood).

This online Calculator is designed to assist you in determining the amount of Fibre Cement or Engineered Wood siding needed to cover a wall.

You can use this tool for different types of Fibre Cement siding manufactures like James Hardie, GAF, Allura, Nichiha, MaxiTile, Cerber.

Whether you’re a homeowner planning a renovation project or a contractor estimating material requirements, this calculator simplifies the process by providing accurate measurements based on your input.

# Siding Calculator

## How to use this tool:

To use the Siding Calculator effectively, follow these simple steps:

### Input Wall Dimensions:

Enter the length and height of the wall you plan to cover with siding. You can input measurements in feet and inches separately for precision.

### Specify Exclusions:

If there are sections of the wall that do not require siding (e.g., windows, doors), enter the total square footage of these areas.

### Define Siding Details:

Provide information about the siding material and specifications:

Length of one siding board (in inches)

Exposed face (reveal) of one siding board (in inches)

Waste allowance percentage (to account for cuts and errors)

## Calculate:

Once all required fields are filled, click the “Calculate” button to generate results.

### Interpreting Results:

After clicking “Calculate,” the Siding Calculator will display the following information:

### Area of the Wall:

This value represents the total square footage of the wall surface, excluding any sections designated as exclusions.

### Number of Boards Needed:

The calculator determines the minimum number of siding boards required to cover the wall based on the provided dimensions and siding specifications.

### Number of Boards Due to Waste:

Accounting for the waste allowance percentage, this figure represents the additional boards needed to accommodate cuts, trimmings, and errors during installation.

### Total Number of Boards Needed:

This is the sum of the boards needed for coverage and those required due to waste, providing a comprehensive estimate for your project.

## Usage Tips:

### Accuracy:

Ensure all measurements are accurate to obtain precise results. Use a tape measure or laser distance measurer for best results.

## Considerations:

Take into account any irregularities in the wall surface, such as protrusions or recesses, when determining the total area requiring siding.

### Waste Allowance:

Adjust the waste allowance percentage based on factors such as your skill level, complexity of the project, and material characteristics.

## Features of Hardie Siding

Hardie siding, also known as James Hardie siding, is a popular choice for homeowners and contractors alike due to its durability, versatility, and aesthetic appeal. Whether you’re embarking on a new construction project or renovating an existing property, accurately calculating the amount of Hardie siding needed is crucial for a successful outcome.

## How do you calculate for Hardie Siding Boards?

Calculating Hardie siding involves determining the total square footage of the wall surface to be covered and then estimating the number of siding panels or planks required based on the dimensions of the siding and the desired reveal. Here’s a step-by-step guide to help you through the process:

### Measure Wall Dimensions:

Using a tape measure or laser distance measurer, accurately measure the length and height of each wall to be clad with Hardie siding. Record these measurements in feet and inches for precision.

### Account for Exclusions:

Identify any sections of the wall that will not require siding, such as windows, doors, or architectural features. Calculate the total square footage of these exclusions and subtract it from the total wall area.

### Determine Siding Specifications:

Consult the manufacturer’s specifications or product documentation to obtain information about the dimensions of the Hardie siding panels or planks, including length, width, and exposure (reveal).

### Calculate Wall Area:

Multiply the length and height of each wall to obtain the total square footage of the wall surface. Subtract the square footage of any excluded areas to determine the net wall area requiring siding.

### Estimate Siding Requirements:

Divide the net wall area by the area covered by one siding panel or plank to determine the total number of panels or planks needed. Consider adding a waste allowance to account for cuts, trimmings, and installation errors.

### Round Up:

Round up to the nearest whole number to ensure you have enough siding material to complete the project. It’s better to have a slight surplus than to risk running out during installation.

## How Much is Hardie Siding for 1200 Square Feet?

The cost of Hardie siding for 1200 square feet will depend on various factors, including the type of Hardie siding chosen, regional pricing variations, and any additional materials or accessories required for installation. To estimate the cost accurately, consider the following:

### Type of Hardie Siding:

James Hardie offers a range of siding products, including HardiePlank lap siding, HardiePanel vertical siding, and HardieShingle siding. Each type of siding may have a different price per square foot.

### Regional Pricing:

Prices for Hardie siding can vary by location due to factors such as shipping costs, local demand, and market conditions. Obtain quotes from multiple suppliers or contractors in your area to compare pricing.

In addition to the siding panels or planks, you’ll need to factor in the cost of other materials required for installation, such as trim boards, fasteners, sealants, and flashing.

### Labor Costs:

If you’re hiring a contractor to install the Hardie siding, labor costs will contribute to the overall expense. Obtain quotes from reputable contractors to determine the labor portion of the total cost.

By considering these factors and obtaining quotes from suppliers or contractors, you can estimate the total cost of Hardie siding for a 1200 square foot area. It’s advisable to budget for any unforeseen expenses or contingencies to ensure a smooth and successful siding installation project.

## How Do I Calculate How Much Siding I Need?

Calculating how much siding you need involves determining the total square footage of the wall surface to be covered and then estimating the quantity of siding panels or planks required based on the dimensions of the siding and the desired reveal. Follow these steps to calculate how much siding you need:

### Measure Wall Dimensions:

Measure the length and height of each wall to be clad with siding, recording the measurements in feet and inches.

### Account for Exclusions:

Identify any areas of the wall that will not require siding, such as windows, doors, or architectural features. Calculate the total square footage of these exclusions and subtract it from the total wall area.

### Determine Siding Specifications:

Obtain information about the dimensions of the siding panels or planks, including length, width, and exposure (reveal). This information is typically available from the siding manufacturer or supplier.

### Calculate Wall Area:

Multiply the length and height of each wall to obtain the total square footage of the wall surface. Subtract the square footage of any excluded areas to determine the net wall area requiring siding.

### Estimate Siding Requirements:

Divide the net wall area by the area covered by one siding panel or plank to determine the total number of panels or planks needed. Consider adding a waste allowance to account for cuts, trimmings, and installation errors.

### Round Up:

Round up to the nearest whole number to ensure you have enough siding material to complete the project. It’s better to have a slight surplus than to risk running out during installation.

By following these steps and performing the necessary calculations, you can accurately determine how much siding you need for your project. Be sure to double-check your measurements and consult with a professional if you’re unsure about any aspect of the calculation.

## How Much Does 1 Square of Siding Cover?

The term “square” in the context of siding refers to a unit of measurement equal to 100 square feet of coverage. Therefore, 1 square of siding covers an area of 100 square feet. This measurement is commonly used in the construction and siding industry to simplify calculations and estimate material requirements more efficiently.

When purchasing siding materials, suppliers and manufacturers often sell siding products in increments of squares, allowing contractors and homeowners to easily determine the quantity needed for a given project. By knowing the coverage area of 1 square of siding, you can quickly calculate the total number of squares required based on the dimensions of the wall surfaces to be clad.

It’s important to note that the actual coverage area may vary depending on the type and profile of the siding, as well as the manufacturer’s specifications. Always refer to the product documentation or consult with a professional to ensure accurate calculations and proper material estimation for your siding project.

## Conclusion

The Siding Calculator streamlines the process of estimating siding material requirements, empowering users to plan their projects efficiently and effectively. By providing accurate measurements and comprehensive results, this tool serves as a valuable resource for homeowners, contractors, and DIY enthusiasts alike. Start using the Siding Calculator today to simplify your siding installation projects!