How do I calculate pond liner size?

Add base area and side area (perimeter × depth), then apply overlap and waste. The calculator does this automatically.

What is a typical liner overlap?

10–15% is common to allow for seams and edging tolerance. Increase for complex shapes.

Does the tool estimate cost?

Yes. Enter the price per m² and it multiplies by the final liner area (after overlap and waste).

Which units are supported?

Enter dimensions in meters or feet; results are in m² and ft² with cost in your selected currency.

Is this estimate exact?

It’s an estimate. Actual liner needed can vary due to slopes, shelves, folds, and installation practices. Verify with suppliers.

Pond Liner Calculator

Name: Pond Liner Calculator
Author: CalculatorBolt

Calculate pond liner size and cost. Enter pond dimensions, shape, depth, liner price, and overlap. Get required liner area in m²/ft² and cost estimate. Informational only—verify with suppliers. Explore more tools on free calculators on CalculatorBolt.

Calculator

Pond Shape

Length

Width

Average Depth

Units

Diameter

Average Depth

Units

Length

Width

Average Depth

Units

Liner Overlap (%)

Waste Factor (%)

Liner Price per m²

Final Liner Area

Estimated Cost

Import JSON

Area rounding

Cost rounding

How it works

Total Surface Area = Base Area + Side Area. Apply overlap and waste factor. Liner Cost = Final Area × Price per m². We calculate base and side areas for rectangular, circular, and oval ponds.

Inputs explained

Pond Shape (rectangular, circular, oval), Dimensions (length, width, diameter, depth), Liner Overlap, Liner Price per m², Waste Factor.

Example

Circular pond, Diameter 4 m, Depth 1 m, Overlap 10%, Waste 5%, Price £5/m² → Base Area = π×2² = 12.57 m²; Side Area = 2×π×2×1 = 12.57 m² → Total = 25.13 m² → Adjusted = 25.13×1.10 = 27.64 m² → Final = 27.64×1.05 = 29.02 m² → Cost = 29.02×5 = £145.10.