Figuring out what you need to build your pond is an important factor to determine it’s cost and efficiency.  The following guidelines should help you. Ask for help at thepondpad@gmail.com

                          How to Estimate Gallon Capacity

Circular Pond: R2 x 3.14 x Depth x 7.48 = Approx. Gal. R2= Radius x Radius (Radius is ½ of the total length)

Irregular /Rectangular Pond: Length x Width x Ave. Depth x 7.48= Approx.Gal.

Irregular Pond w/shelves: Length x Width x Depth x 7.48 x .66= Approx. Gal.

Streams: Length x Width x .25 (Depth) x 7.48= Approx.Gal.

How to Calculate Pond Liner Size.

Length= Length + (Depth x 2) + 2      Width= Width + (Depth x 2) + 2

Example: 8 x 10, 2′ deep L= 10′ + (2×2) + 2= 16′ W= 8′ + (2×2) + 2= 15′ 

                                    Electrical Conversions / Consumption

WATTS= Volts x Amps AMPS= Watts / Volts 1HP= 745.7 Watts

Approximate Electrical Cost to run a pump, etc.

Amps x Volts x 1000 x .10(KW per hour) x 24hrs x 30.4 days=$ / month

                           Aquatic Plant Calculations

Water Lilies: 1 per every 45-60 Sq F

Marginal Plants: 1 plant per every 3′-4′ shelf margin

Bog Plants: 1 plant for every 2′ of bog

 

                            Rock Calculations- For Gravel & Boulders

Boulders for Pond Basin:

Length x Width / 65 Tons of Boulders Use a 1:2:1 ratio

For every 1 Ton of 6”-12” rock; get 2 Tons of 12”-18” and 1 Ton of 18”-24” rock

½ Ton of 6”-12” of rock will cover 20 linear feet

1 Ton of 12”-18” of rock will cover 10 linear feet

1 Ton of 18”-24” rock will cover 5 linear feet

Boulders for Stream- For every 10′ of Stream, Use 3/4 Tons of rock using ratio above.

Boulders for Waterfall- Use 1 Ton of rock per each 3′-4′. Choose some larger stones for support, and some rocks with flat or interesting faces for the waterfall.

Gravel for Pond Basin- Use 40% total tons used for pond boulders calculations

Gravel for Streams- Use ½ Ton for every 10′ of stream

Pondless/ Disapearring Waterfall- Length x Width x Depth = Cubic feet

Use 90lbs of rock per each cubic foot; Use Ratio of: 40% 4”-6” Rock

(for the bottom of the basin) and 60% of 1 1/2” – 2” rock (for middle and top layer). Add decorative gravel / rock as a top dress.

These are guidelines to help you, always over estimate whenever possible. Any left over rock can be blended into your surrounding landscape.

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