Easy Pond Calculator

Take a look at the various pond calculators below. Use the volume calculator to calculate the volume of a pond in litres or gallons. The liner calculator will work out the size of liner required based on the ponds dimensions. If you need to know how much water should to be pumped by a pump then use the pump calculator. The cost calculator will tell you the electrical cost of running your pond monthly or annually, you can also use this calculator for individual components or to compare the cost of running different components.

Pond Liner Calculator

Calculate the size of liner required. Enter the maximum dimensions of the pond. Also enter the amount of overlap required per side of the liner if any.

Enter the maximum dimensions of the pond in the desired measurement unit:
Meters Feet & Inches
Max Width: meters
Max Length: meters
Max Depth: meters
Enter the amount of liner overlap required per side Liner Help:
Liner Overlap: meters

An overlap is generally required so there's adequate extra material which can be placed under the pond edging and/or simply for safety to ensure that the liner will not be too small for the pond. Generally an overlap of between 2 to 3 inches or 0.05m to 0.08m is added to each side of the liner (the overlap amount is added on to each of the 4 sides of the liner).

Pond Volume Calculator

Calculate the volume of a pond in litres or gallons. If the pond is not exactly recangular or circular use average dimensions.

1) Select the Shape of the pond:
Rectangular Pond Calculator Circular Pond Calculator
Rectangular Circular
2) Enter the dimensions of the pond:
Meters Feet & Inches
Width: meters
Length: meters
Depth: meters

Pond Pump Calculator

Calculate the minimum amount of water that the pump is required to pump in GPH (gallons per hour) and LPH (litres per hour).

What will the pond contain:
No fish and lots of plants
Goldfish and some plants
Koi (or big fish) and very few or no plants
Pond Volume:  

Calculate the volume of water that the pump must be able to cycle every hour. However, static head and losses also need to be taken into consideration. If the pump is carrying the water to a height above the ponds surface to a waterfall for example, then it will encounter "static head". Static head is the vertical distance the water is raised. The higher the water is carried the greater the static head. Other losses include friction in the hose, know as "friction head". For every 10 feet of hose the water must travel through is approximately equivalent to 1 foot of static head. As the static head increases the flow rate of the pump will decrease. Therefore when choosing a pump it is important to make sure that the pump can deliver the required flow at the static head it will encounter. The specifications of a pump will normally display a chart representing the flow rate at different heights (static head).

Pond Cost Calculator

Calculate the monthly and yearly electrical cost of running your pond or an individual component.

Enter the total power used by all the electrical components part of the pond that run constantly, e.g. pumps, filters, etc.
Total Power Usage: W (watts)
Enter the cost of electricity per kWh:
Cost per kWh: $ per kWh

Total Power Usage
The "Total Power Usage" is the total sum of power used by all the electrical devises. Make a list of all the devises that are utilised by the pond continuously and note their power rating. The power rating can normally be found on the product itself; there might be a label with electrical specifications on the product, the specifications may also be found on product packaging or manuals. Look for the power rating normally given in W (watts). However sometimes it be given in kW (kilowatts), in which case you should multiply it by 1000 to convert it to W (watts). Add the power rating of all the items together and enter the final sum in the Total Power Usage field.
Cost per kWh
The "Cost per kWh" is how much electricity costs you for every 1 kW (kilowatt) of energy you use. This is charged by your electricity provider and you can find the cost per kWh on a recent bill from your provider. Alternatively you should make an enquiry with your provider.