Pool Cover Size Calculator

Why Pool Cover Sizing Matters

A pool cover does more than keep out leaves and debris. It protects your investment, reduces maintenance, and helps retain heat. But for it to work effectively, it must fit correctly.

• Too small, and it leaves gaps where dirt and debris can enter.
• Too large, and it may bunch up, wrinkle, or strain the cover anchors.

The Pool Cover Size Calculator takes the guesswork out of this process by applying accurate overlap margins based on your pool’s shape and the cover type you select. The result is a snug, protective fit every time.

How the Pool Cover Size Calculator Works

The calculator uses a simple but effective formula to determine the ideal fabric size:

• Cover Length = Pool Length + Total Overlap + Step Length (if any)
• Cover Width = Pool Width + Total Overlap

Here’s what each input means:

1. Pool Length and Width (ft) – Measure the inside dimensions of your pool from wall to wall.
2. Step or Feature Length (ft) – If your pool has a step, tanning ledge, or built-in bench that extends beyond the main shape, include its length.
3. Cover Type – Select your cover type to automatically apply the correct overlap or margin:
   • Standard Winter Cover: 2.5 ft overlap on each side
   • Safety/Mesh Cover: 3.0 ft margin for proper tension and anchoring
   • Automatic Cover: 0.5 ft margin for precise track fitting

Once you click “Calculate Cover Size,” the calculator instantly displays your minimum cover length and minimum cover width — including all required margins for a safe and professional fit.

How to Use the Pool Cover Size Calculator

1. Measure Your Pool
   Use a tape measure to find your pool’s length and width in feet. Measure from the inside edge of the coping for accurate results.
2. Add Step or Feature Length
   If your pool has extended steps or a spa ledge, include that measurement. If not, enter zero.
3. Choose Cover Type
   Select whether you’re using a winter, mesh/safety, or automatic pool cover. Each type requires a different overlap.
4. Click “Calculate Cover Size”
   The calculator instantly gives you the recommended cover dimensions in feet.
5. Use Results for Ordering
   These measurements help you order the right-sized cover or verify that a standard cover will fit your pool’s unique layout.

Example Calculation

Let’s say your pool is 30 ft long and 15 ft wide with no steps. You select a Standard Winter Cover with a 2.5 ft overlap on each side.

• Total Overlap = 2 × 2.5 ft = 5 ft
• Required Cover Length = 30 ft + 5 ft = 35 ft
• Required Cover Width = 15 ft + 5 ft = 20 ft

The calculator will show:

• Minimum Cover Length: 35.0 ft
• Minimum Cover Width: 20.0 ft

If your pool had a 3 ft step, the calculator would automatically add that, giving you a final length of 38.0 ft.

Benefits of Using a Pool Cover

A properly sized cover not only looks neat but also provides real advantages:

• Prevents debris buildup and keeps your pool cleaner between uses.
• Reduces water evaporation, saving on refill costs.
• Minimizes chemical loss, keeping your pool balanced longer.
• Enhances safety, especially with mesh or safety covers.
• Improves energy efficiency by retaining heat in heated pools.

With the right size cover, you get better performance, less maintenance, and a longer lifespan for your cover and pool.

Tips for Accurate Measurement

• Measure your pool twice to confirm accuracy before ordering.
• Always include steps, ledges, or irregular shapes in your total length.
• If your pool has rounded or freeform edges, measure the longest points for both length and width.
• For safety covers, add extra margin if you have wide decking or an irregular perimeter.
• When in doubt, consult your installer with the calculator results for confirmation.

Understanding Overlap and Margin

Every pool cover needs extra material beyond the pool’s edge for anchoring or tension. This is known as overlap (for winter covers) or margin (for mesh and automatic covers).

• Overlap covers the pool edge and part of the deck, allowing for easy securing with water bags or clips.
• Margin is the safe zone around the pool used for tension anchors or track installation.

By including this automatically in the calculation, the tool ensures that your cover fits safely and performs effectively year after year.

Disclaimer

This calculator provides an approximate fabric size that includes the recommended overlap or margin for standard pool shapes. Always verify your final measurements with your pool installer or cover manufacturer before ordering. Custom pools, irregular edges, or raised features may require additional adjustments.