What is the recommended pond pump turnover?

General ponds: 1.5–2.0× per hour. Koi ponds: 0.5–1.0× per hour. Adjust for fish load and filtration.

How do I calculate pump head?

Total head = vertical lift + friction loss in the pipe + filter head (if applicable).

How is pump power estimated?

Power ≈ (Flow (L/h) × Head (m) × 0.0027). This assumes ~70% pump efficiency and is illustrative.

Which units are supported?

Volume in m³ or liters; pipe in m/ft and mm/in; lift in m/ft. Results in L/h, m, and watts.

No. It’s an estimate and does not replace manufacturer pump curves. Consult suppliers and allow a safety margin.

Pond Pump Calculator

Name: Pond Pump Calculator
Author: CalculatorBolt

Calculate pond pump flow rate (L/h) and head (m). Enter pond volume, turnover rate, pipe length, diameter, and vertical lift. Get recommended pump specs. Informational only—consult suppliers. Explore more tools on free calculators on CalculatorBolt.

Calculator

Pond Volume

Units

Turnover (times/h)

Pipe Length

Units

Pipe Diameter

Units

Vertical Lift

Units

Include Filter Head

Filter Head (m)

Required Flow Rate

Total Head

Pump Power

Import JSON

Pump Efficiency

Flow rounding

Head rounding

How it works

Required Flow Rate = Pond Volume × Turnover Rate. Total Head = Vertical Lift + Friction Loss + Filter Head. Pump Power = (Flow × Head × 9.81) / 3600 / Efficiency (simplified to Flow × Head × 0.0027 at 70% efficiency). We use a simplified friction loss approximation.

Inputs explained

Pond Volume, Turnover Rate, Pipe Length/Diameter, Vertical Lift, Optional Filter Head, Pump Efficiency.

Example

Pond 15,000 L (15 m³), Turnover 1.5×/h → Flow = 15,000 × 1.5 = 22,500 L/h. Pipe 25 mm, 5 m, Lift 1 m, Filter 1 m → Head ≈ 1 + 0.5 + 1 = 2.5 m → Power ≈ 22,500 × 2.5 × 0.0027 ≈ 152 W.