How do I calculate what size pond liner I need?

To calculate the required pond liner sheet dimensions, measure your maximum pond length and width, then add twice the maximum depth plus twice your desired edge anchor overlay. PondLinerCalc automatically performs this computation in 3D.

How do I calculate total water volume and pump turnover?

Total water volume is determined by summing the surface area across varying depth shelves and terraces. For healthy biological filtration, select a pond pump capable of turning over your total water volume at least once every two hours.

PondLinerCalc

POND LINER CALCULATOR

Measurement System

1. Setup Scale & Guides

Draw a Reference Line on the canvas to set your real-world scale, then add custom guide lines to help layout your design.

Reference Length

Not set

2. Draw Pond Shape

Click to place points. Click the starting point to close the shape.

3. Depths, Wall & Cost

Max Depth (For Liner)

Default Pond Floor Depth

Wall Height Above Earth (For Liner)

Liner Price per m²

Freehand Depth Terraces

Select depth & shelf width, then paint custom terraces inside your pond.

Terrace Depth

Shelf Width

4. Share & Export

Generate a permanent shortform project link to save your design, revisit anytime on any device, or send to builders.

About This Calculator

PondLinerCalc is an advanced structural engineering and bathymetric modeling web application designed for landscape contractors, water feature builders, and DIY pond enthusiasts. Our interactive 3D sizing engine eliminates the guesswork from aquatic construction by converting your custom 2D perimeter sketches into precise mathematical calculations.

Unlike basic length-times-width estimators, our system accurately computes the exact 3D wetted surface area and accounts for complex excavation geometries, including multi-level horizontal plant shelves, vertical sheer drops, and variable wall heights. It automatically calculates the required EPDM, PVC, or HDPE rubber liner sheet dimensions by factoring in strict structural fold allowances, anchor trench overlaps, and corner tuck pleats.

Beyond material sizing, the calculator instantly determines the total hydrostatic water volume capacity (in both Liters and US Gallons). This critical metric drives our biological simulation modules, which establish ideal mechanical pump turnover rates, required UV clarifier output, and safe biological stocking limits for demanding aquatic life such as mature Koi and Sturgeon.

Use our interactive tools above to trace your custom footprint, designate stepped terraces, and immediately generate professional, shareable project estimation quotes that you can take directly to your local material supplier.

Best experienced on PC Desktop browsers for 3D drawing precision

Draw a reference line first.

100%

Liner Required (estimated)

0.0 x 0.0 m

Area: 0 m²

Est. Cost: $0.00

Water Volume

0 L

Surface Area: 0 m²

3D Shell Area: 0 m²

Water Weight: 0 kg

Hose Fill Time: 0 mins

Filtration & Equipment

0 L/h

2-hour pump turnover size

UV Clarifier: 0 Watts (UV-C)

Fish Capacity Test Viability

Koi: 0

Goldfish: 0

Orfe: 0

Sturgeon: 0

Liner Required (estimated)

Water Volume

Filtration & Equipment

Fish Capacity Test Viability

PondLinerCalc Engine

Fish Viability Simulator

Configure Species Densities

Project Exported!

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