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Bentonite Clay Pond Calculator

Professional pond treatment planner — accurate dosage calculations

Pond Volume Calculator
1

Pond Volume / Area

Enter pond area or volume

2

Pond Depth

Average depth or multi-level for irregular ponds

Multi-Level Depth Zones

For irregular or sloped ponds

Depth Zones
Zone NameDepthShare %

Sloped Pond Adjustment

Adds extra clay for sloped sides

1.00×
1.00× flat1.25×1.50× steep
3

Clay Dose Rate

Adjust application concentration

Industry standard: 1–3 lbs per sq ft of pond bottom. Default: 2 lbs/sq ft. Heavier or sandy soils may require higher rates.
2.0
0.5Default: 2.04.0
lbs / sq ft
4

Multi-Zone Configuration

1 zone — distribute clay across pond sections

Zone NameArea ShareDepth

Seasonal Application Advice

Based on current season

Benefits of Bentonite Clay
Natural, non-toxic pond sealant — safe for fish and wildlife
Expands up to 15× its dry volume when hydrated, forming a tight seal
Cost-effective compared to synthetic liners for large ponds
Improves water clarity and reduces turbidity
Long-lasting — properly applied bentonite can last 20+ years
How to Apply Bentonite to Ponds
1Drain or lower pond water level to expose the bottom
2Spread bentonite clay evenly across all bottom surfaces
3Work clay into the top 2–4 inches of soil using a tiller or harrow
4Re-fill pond slowly to allow clay to hydrate and seal properly
5Allow 2–4 weeks for full hydration before normal pond use
Common Mistakes to Avoid
Under-applying clay — always use the recommended dose for your soil type
Not tilling clay into soil — surface application alone is less effective
Applying during heavy rain or flooding — clay can wash away before sealing
Applying to frozen or frost-covered ground — prevents proper hydration

Live Results

Pond Diagram

Water Clay

Quick Unit Reference

1 acre-foot325,851 gallons
1 acre43,560 sq ft
1 sq meter10.76 sq ft
1 kg2.205 lbs
1 gallon3.785 liters

Bentonite Clay Pond Calculator — for precision pond treatment planning. Results are estimates; consult a professional for large or commercial applications.

Pond Volume Calculator