This pond liner calculator shows exactly how your liner size and cost are calculated. Every step is clear, simple, and based on real pond construction formulas — no hidden math.

Step 1: Enter Your Pond Details

Start by selecting your pond shape and entering basic dimensions:

• Length

• Width

• Average depth

These measurements define the base size of your pond.

Step 2: Add Overlap & Allowances

The calculator automatically includes:

• Side wall depth

• Liner overlap for secure installation

• Seam allowance (if needed)

This prevents ordering a liner that’s too small.

Step 3: Include Underlay & Waste (Optional)

If selected, the tool calculates:

• Required underlay area

• Extra material for waste or irregular pond edges

This is helpful for real-world installations.

Step 4: Cost Calculation

Enter the material cost (if known), and the calculator estimates:

• Total liner material required

• Approximate project cost

Costs are estimates and can be shared with suppliers or clients.

Step 5: View Final Results

You instantly receive:

• Exact liner cut size

• Recommended liner width

• Total material needed

• Estimated project cost

• Pond volume (gallons)

All results are shown clearly in one place.

Step 6: Export or Save

You can:

• Print the calculation summary

• Download a CSV file for records or contractor quotes

Who This Calculator Is For

• DIY pond builders

• Koi and water garden owners

• Landscapers and contractors need accurate estimates

Built for simple use, trusted for professional results.