🌊 Pond Size Calculator — Advanced Volume, Liner & Pump Estimator
📐 The pond size calculator helps gardeners, aquaculturists, and landscape designers determine accurate water volume, liner dimensions, pump flow rates, and fish stocking limits. Supports rectangular, circular, and oval ponds — worldwide units (US Gallons / Liters) with real-time chart. Based on international engineering standards and USA depth/fish guidelines.
⚙️ Pond Geometry
📏 US/Imperial (ft, gal)
🌍 Metric (m, liters)
⚡ Advanced: volume updates in real time • Graph auto‑refreshes
💧 Calculated Results
💦 Total Volume (US Gallons):0.00 gal
🌊 Total Volume (Liters):0.00 L
📦 Cubic Volume (ft³ / m³):0.00
🟧 Surface Area:0.00
🧵 Recommended Liner Size (L x W):—
⏱️ Pump Flow (min. turnover 1x/h):—
🐟 Max Fish Stock (USA guideline):—
✅ USA Standards: depth ≥2ft (0.6m) for winter safety | 1″ fish per 10 gal for koi/goldfish
📊 Volume Comparison (Gallons vs Liters) & Global Standards
*Graph updates dynamically based on your pond dimensions
🇺🇸 Depth Requirement (USA)
Minimum 2 ft (0.6m) for fish survival; Northern states recommend 3-4 ft to prevent freezing. Shallow ponds need aeration.
🌐 Worldwide Fish Load
General rule: 1 inch of fish per 10 gallons (38 L). Overstocking reduces oxygen. Koi require extra filtration.
💨 Pump & Turnover
Pump should circulate total pond volume once per hour. For heavy fish load → 1.5-2x turnover. Adjust accordingly.
🧵 Liner Overlap
Formula: length + 2×depth + 2ft extra for anchoring. This calculator includes safety margin (2ft/0.6m).
⚖️ Metric/Imperial
Switch units instantly: feet→meters, gallons→liters. Supports EU, Asia, Americas without confusion.
🌿 Surface Area Impact
Larger surface improves oxygen exchange. For hot climates, increase aeration. Area shown in sq ft / sq m.