A perfectly fitting, secure pool cover not only makes your backyard look neater and more beautiful, but it also protects the safety of your children and pets, and is the first line of defense against long-term structural damage. Of course, your choice of material depends on your own actual situation, and the foundation of everything is correct measurement and correct anchor point installation, which are extremely important.

In this guide, we will show you how to measure correctly, weigh the pros and cons of different types of pool covers, and avoid common mistakes to ensure that you find the right product first time.

Why Proper Sizing Matters

Choosing the right size safety pool cover ensures:

• Maximum safety (especially around children or pets)

• Full debris protection during the off-season

• Tension balance, which prevents sagging or tearing

• Efficient water drainage, especially for mesh covers

• Cleaner pool openings, saving you time and cost

An improperly sized cover, on the other hand, can result in:

• Gaps along the pool edge

• Anchors pulling loose due to poor tension

• Cover wear and tear from uneven stress points

• Reduced lifespan and expensive replacements

  
  

Step 1: Determine Your Pool Shape

Before measuring, identify your pool’s shape:

Pricing and production schedules generally start with the main pool outline, while custom features—like steps or jets—are priced separately.

Step 2: Gather the Right Tools

To measure your pool correctly, you’ll need:

• A measuring tape (preferably 50–100 feet)

• Graph paper or a printed pool diagram

• A marker or pencil

• A helper (for large or freeform pools)

Capturing overhead images of complex corners or unusual angles helps ensure the designer fully understands the layout, reducing clarification delays.

Step 3: How to Measure a Rectangular Pool

For a basic rectangular pool:

1. Measure the overall length from edge to edge.

2. Measure the width at the widest points.

3. Add at least 1 foot (30 cm) of overlap on each side.

   * Example: A 16' x 32' pool needs a 18' x 34' cover.

4. Note any additional areas (e.g., step sections or extended patios).

Important:

•  Include coping stones (deck edge) in your total measurement.

•  Don’t round measurements—record to the nearest inch or centimeter.

Step 4: How to Measure Irregular or Freeform Pools

If your pool has curves or a unique shape:

1. Divide it into basic geometric sections—rectangles, circles, triangles.

2. Measure each section’s length, width, and angle (if possible).

3. Create a scaled sketch on graph paper, marking:

    Interior pool dimensions

    Distance between key features (steps, ladders, walls)

    Locations of obstructions (spas, rocks, waterfalls)

Alternatively, some manufacturers offer measuring grids or request photos from multiple angles to assist with custom fitting.

Step 5: Identify Special Features and Add-Ons

Safety covers must fit around or accommodate special design elements. Make sure to record:

•  Step sections (corner steps, full-width, Roman ends)

•  Built-in spas or tanning ledges

•  Waterfalls or raised walls

•  Handrails or ladders that cannot be removed

•  Diving boards or slides

These will require custom cut-outs or reinforcements. Failure to note them may result in poor cover fit or cover damage.

Step 6: Consider Anchor Placement

Pool covers are typically anchored into surrounding decks using:

•  Brass deck anchors for concrete

•  Anchor plates for pavers

•  Wood deck hardware for wood surfaces

Make sure there’s sufficient space (at least 12–18 inches) around the pool perimeter for proper tension and anchor installation. If the space is tight:

You may need wall mount anchors or custom tensioning systems

Covers can be modified with repositioned strap placement

Take note of obstructions near the deck like fencing, landscaping, or built-in furniture that might interfere with anchor installation.

Step 7: Choosing Cover Type Affects Fit

Safety covers come in two main types:

Solid covers may require slightly tighter measurements due to less flexibility, while mesh covers can tolerate minor adjustments more easily.

Step 8: Common Measurement Mistakes to Avoid

Taking the time to measure correctly will prevent ordering delays and ensure a smooth installation.

Step 9: Submitting Your Measurements

Once measurements are complete:

•  Compile into a clean diagram or drawing

•  Label all sides, curves, and dimensions clearly

•  Include pool photos if requested or helpful

•  Specify your cover type preference (mesh or solid)

•  Confirm deck material for anchor compatibility

Many suppliers offer a custom quote process or measurement template you can download. For complex projects, some will also send field measurement technicians (at extra cost).

Step 10: Final Check Before Ordering

Before placing your order, ask yourself:

•  Have I included all special features?

•  Did I measure outer dimensions, not just waterline?

•  Is the deck space sufficient for the anchors?

•  Did I choose the right overlap (typically 12–18 inches)?

•  Have I double-checked all numbers and notes?

Even small mistakes can lead to poor fit or the need for costly modifications. Take time to verify everything before confirming.

Bonus Tips: Measuring for Winter vs. Year-Round Use

If your cover is seasonal (used only in winter), flexibility is key. If you plan to keep it on year-round:

We’ll show you how to take proper measurements, select the ideal cover dimensions, and sidestep typical ordering mistakes.

Measure Once, Fit Right for Years

Measuring a rectangle or circle is straightforward, but pools with steps, benches, or vanishing edges ask for extra care. Spending a quiet afternoon with a tape, pencil, and maybe a friend means less money wasted, less frustration, and fewer worries about safety later on. Include those features, plan where anchors will land, and you set the cover up to hug the water, shed debris, and keep chemicals balanced season after season.

So, grab your tape measure, sketch your pool, and take the first step toward smarter, safer pool protection.