Sq Feet to Linear Feet Calculator
Convert square footage into the linear footage of rolls, boards, panels, fabric, turf, roofing, or landscape material using actual width, overlap, waste, and roll length.
📌Real Project Presets
⚙️Calculator Inputs
📊Results
Calculation breakdown
📐Material Width Comparison
📚Reference Tables
| Material | Common width | Typical overlap | Planning note |
|---|---|---|---|
| Carpet roll | 12 ft | 0 in | Direction and seams drive waste. |
| Artificial turf | 15 ft | 3-6 in | Seams and grain direction matter. |
| Roofing felt | 36 in | 2-4 in | Side laps reduce net coverage. |
| Landscape fabric | 3-6 ft | 4-12 in | Overlap more for weed control. |
| Upholstery fabric | 54 in | 0-1 in | Pattern repeat can raise length. |
| Coverage mode | Width used | Rounding | Best for |
|---|---|---|---|
| Net finished area | Width minus overlap | Waste only | Flooring, turf, wrap, felt. |
| Gross material area | Full material width | Waste only | Areas already measured with laps. |
| Pattern or seam repeat | Width minus overlap | Next repeat spacing | Fabric, vinyl, carpet matching. |
| Strip or board layout | Width minus gap/lap | Whole stock lengths | Deck boards, panels, planks. |
| Area | 3 ft width | 4 ft width | 12 ft width |
|---|---|---|---|
| 100 sq ft | 33.4 lin ft | 25.0 lin ft | 8.4 lin ft |
| 250 sq ft | 83.4 lin ft | 62.5 lin ft | 20.9 lin ft |
| 500 sq ft | 166.7 lin ft | 125.0 lin ft | 41.7 lin ft |
| 1000 sq ft | 333.4 lin ft | 250.0 lin ft | 83.4 lin ft |
| Preset | Area | Width | Typical waste |
|---|---|---|---|
| Room carpet | 180 sq ft | 12 ft | 8-12% |
| Roof underlayment | 1200 sq ft | 36 in | 8-15% |
| Landscape bed | 320 sq ft | 4 ft | 10-20% |
| Deck boards | 240 sq ft | 5.5 in | 8-15% |
💡Practical Tips
⚠️Safety Note
When you purchases materials for a home improvement project, you must distinguish between the square footage of an area and the linear feet of the material. You need to calculate the linear feet to determine how many linear feet of material you need to purchase to cover the areas in square footage. If you purchase the material only according to the square footage of the area you intends to cover, you may purchase too little or too much material for that project.
The width of the material you purchase affect the linear feet of that material that you need to purchase. For example, if the material is 12 feet wide, it will cover more square footage than if the material is only 6 feet wide. The 12 foot material will cover more square footage because it will have more area within the same length of the material.
How to Calculate Linear Feet for Your Project
However, if the material require an overlap to cover the area, such as roofing felt that requires a two-inch overlap, the effective width of the material will be less then the stated width of the material. Therefore, you will need to purchase more linear feet of material to ensure that the area is complete covered. Another consideration when calculating the linear feet of the material you need for a project is the waste that will be created during the installation of the material.
Many home improvement store catalog will include a ten percent waste allowance for cutting the materials. However, a ten percent waste allowance may not be enough for some projects. For instance, if the material features a design or pattern, you must cut the material so that the design or pattern continue at the seams of the project.
Therefore, the waste allowance for projects with a patterned material may need to be fifteen percent. The calculator will account for these waste allowances so that you dont purchase too little or too much of material for your project. The stock length of the material also influence the linear feet of the material you must purchase.
For instance, if the carpet rolls are 100 feet in length, you must purchase one full roll of carpet, even if you only need 87 linear feet of carpet. Additionally, if you are purchasing deck board, there will be waste in the length of each board. If the boards are 16 feet in length, and you need three decks that are 12 feet long, you will create waste in the amount of leftover wood from the last cut of each board.
Therefore, you must account for the lengths of each board when calculating how many boards you will need to complete your project. The shape of the area to be covered also affects the amount of waste that will be created during installation. A long, narrow hallway will create less waste than a square room in the same area.
An L shaped deck will create more waste than a square-shaped deck. This is due to the number of cuts that you will need to make when installing the material in the corners of the L-shaped deck. Some projects involving fabric may have a design or pattern that you must allow for in the calculation of linear feet.
For instance, if a fabric has a 24-inch vertical design or pattern, extra linear feet of the material will be needed so that the pattern line up at the seams of the project. Therefore, when purchasing this type of material, the repeat mode on the calculator will be used to determine how many linear feet of material you will need. The measurements used to calculate the linear feet of the material may be in meter or feet.
However, the calculation performed by the calculator will remain the same. If the area to be covered is measured in square meters, and the width of the material is in meters, the result will be the number of linear meter of the material that is needed. The calculator will account for these calculations for the user.
To avoid making any mistake in purchasing the materials you need for your project, you should first measure the finished area in which the material will be installed. After you have measured the area that you will be covering, you will need to determine the width and the overlap of the material that you will use in your project. Once you know the width of the material and the overlap that it will have, you can calculate the linear feet of the material that you will need to purchase.
By accurately calculating the linear feet of the material that will be used in your project, you will avoid purchasing too little or too much of the material to complete the project.
