Water

Pond Volume Calculator — Gallons & Liner

Estimate pond gallons, liner size, and a planning pump range. Your entries stay in your browser and are not sent anywhere.

Project measurements

Use consistent units and the product label or supplier figures where provided.

Before you buy

Practical measuring tips

  • Use average dimensions for irregular shapes.
  • The shape factor reduces a rectangular-box estimate; adjust it to reflect the pond form.
  • Pump selection also depends on head height, plumbing, filtration, and livestock.

Formula

What the result includes

Average dimensions × shape factor estimate volume; liner dimensions add twice the depth and overlap.

Whole-item results such as bags, rolls, blocks, and pallets are rounded up. Decimal volume or weight results remain estimates so you can compare bulk options.

Optional supplies

Compare project materials

Use your estimate to compare package coverage, delivery terms, and product instructions. This retailer search is not an affiliate link until a partner ID is configured.

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Common questions

Pond Volume Calculator FAQ

Why is there a shape factor?

Most ponds do not fill a perfect rectangular box. The factor lets you reduce the box volume for a more realistic planning estimate.

Is the pump range a recommendation?

No. It is a turnover-based planning range; use pump curves and system requirements for selection.