Rectangle Fence Perimeter Calculator
Calculate the linear footage for your fencing project. Estimate total perimeter, number of panels, and post requirements for a rectangular yard.
Yard Dimensions
Project Estimates
What is Fence Perimeter?
The fence perimeter is the total distance around the boundary of the area you plan to enclose. It is measured in linear feet and serves as the primary number for estimating project costs, materials, and labor.
This specific calculator is designed for rectangular or square lots, which are common for backyard fencing projects. It helps you quickly translate dimensions into an actionable shopping list for panels and posts.
This calculation helps you:
- Budget Properly: Contractors quote fence installation by the linear foot.
- Order Materials: Determine exactly how many 8-foot panels to buy.
- Plan Layout: Visualize post placement and gate locations.
To calculate detailed materials like pickets, rails, and concrete, use our comprehensive Fence Calculator for a full breakdown.
For digging post holes, check our Fence Post Depth Calculator to ensure stability.
To estimate the concrete needed for setting posts, use our Concrete Calculator.
For staining or painting your new fence, try our Deck Stain Calculator (works for fences too!).
To ensure your property lines are accurate, verify dimensions with our Feet and Inches Calculator.
How to Calculate Panels
The calculation follows these steps:
- Find Perimeter: 2 × (Length + Width).
- Subtract Gates: We assume an average gate width of 4 feet per gate. Subtract this from the perimeter.
- Divide by Width: Divide the remaining length by your panel width (e.g., 8 feet).
- Round Up: You can't buy half a panel, so we round up to the next whole number.
Example for 160ft perimeter with one 4ft gate and 8ft panels:
- Effective Length = 160 - 4 = 156 ft.
- Panels = 156 / 8 = 19.5.
- Result = 20 Panels.
Key Concepts Explained
Linear Foot
The standard unit for fencing. It measures length only, regardless of height. A 50-foot fence run is "50 linear feet."
On-Center Spacing
The distance from the center of one post to the center of the next. This must match your panel width (e.g., 8ft) for pre-made panels to fit.
Terminal Posts
The heavy-duty posts used at corners, ends, and gate openings. They undergo more stress than standard "line posts."
Line Posts
The intermediate posts that simply hold the fence panels up in a straight run. They carry less load than corners.
How to Use This Calculator
Measure Yard
Measure length and width of the area to enclose.
Select Panel
Choose your panel width (usually 8ft).
Add Gates
Enter how many gates you plan to install.
Calculate
See perimeter footage and material counts.
Benefits of Using This Calculator
- • Quick Estimation: Get a fast idea of project scale before detailed planning. Perfect for initial budget checks.
- • Contractor Check: Verify the footage measurements given to you by fencing companies to ensure you aren't being overcharged.
- • Material Planning: Helps ensure you order enough panels to complete the loop without needing a second delivery.
Factors That Affect Your Results
1. Slope
This calculator assumes a flat lot. If your yard is sloped, the actual fence line (hypotenuse) will be longer than the horizontal measurement. For steep slopes, add 5-10% to your linear footage.
2. Corners & Obstacles
Every corner breaks the "one post per panel" rhythm. If you have a complex shape or have to navigate around trees, you will need extra posts and cut panels.
Frequently Asked Questions (FAQ)
Q: Does this work for non-rectangular yards?
A: This specific calculator is optimized for rectangles. For irregular shapes (L-shaped yards, etc.), simply measure each straight side individually and add them up using a basic calculator to get linear footage.
Q: How wide are fence gates?
A: Standard single walk gates are 3-4 feet wide. Double drive gates are typically 10-12 feet wide. Remember that gates require larger, deeper posts for support.
Q: Do I need a permit for a fence?
A: Most likely. Check with your local municipality or HOA before building. There are often strict rules about fence height (usually max 6ft in back, 4ft in front) and property line setbacks.
Q: Can I cut fence panels?
A: Yes. Wood panels can be easily cut to width with a circular saw. Vinyl or metal panels can also be cut but may require special blades. You will almost always have one "short" panel at the end of a run.