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4 × 3 m pond: gallons, liner and pump
A 4 × 3 m pond with straight sides, 1.20 m deep, holds 3,804 US gallons (14,400 litres). Adjust the shape and depth below for your pond.
Volume by depth
| Depth | US gallons | Litres | UK gallons | Oval, same size |
|---|---|---|---|---|
| 80 cm | 2,536 | 9,600 | 2,112 | 1,992 (7,540 L) |
| 100 cm | 3,170 | 12,000 | 2,640 | 2,490 (9,425 L) |
| 120 cm | 3,804 | 14,400 | 3,168 | 2,988 (11,310 L) |
What a 4 × 3 m pond needs at 1.20 m
| Liner | 7.00 m × 6.00 m (with 30 cm overlap) |
|---|---|
| Pump — goldfish | 3,804 GPH (14,400 L/h) |
| Pump — koi | 5,706–7,608 GPH (21,600–28,800 L/h) |
| UV clarifier | 55 W goldfish · 110 W koi |
| Fish | 31–63 adult goldfish · up to 15 koi |
| Water weight | 31,750 lb (14,400 kg) |
See the guides to liner sizing and pump sizing, and koi pond depth and volume.
Questions
How many gallons is a 4 × 3 m pond?
At 1.20 m deep with straight sides, 3,804 US gallons (14,400 litres, 3,168 UK gallons). An oval pond of the same length and width holds about 79% of that.
What size liner does a 4 × 3 m pond need?
7.00 m × 6.00 m for 1.20 m deep with 30 cm of overlap on each edge.
What size pump for a 4 × 3 m pond?
About 3,804 GPH (14,400 L/h) of real flow for goldfish, or 5,706–7,608 GPH for koi.