Graniterock’s series of on-line Construction Calculators will help you estimate the amount of material that you will need for your construction jobs. The calculators are grouped into these categories:

See also www.engnet.us for additional helpful calculators.

Pond Information Chart

Pond Kit Size1 Calculation Sizes	Maximum Gallons of Water L × W × Average Depth × 7.48	Quantity of Boulders (tons) L × W ÷ 65 6–12, 12–18, 18–24	Quantity of Gravel (tons)2 Tons of boulders used × 0.45 ¼ – 3"	Quantity for Biofalls (tons)2 Boulders 12–18"	Maximum Quantity of Fish (inches) T × W (Surface Area)
4 × 6	360	0.37	0.17	0.75–1.25	24
6 × 8	718	0.74	0.33	0.75–1.25	48
6 × 11	987	1.02	0.46	0.75–1.25	66
8 × 11	1,316	1.35	0.61	0.75–1.25	88
11 × 11	1,810	1.85	0.84	0.75–1.25	121
11 × 16	2,633	2.71	1.22	0.75–1.25	176
14 × 16	3,351	3.45	1.55	0.75–1.25	224
16 × 16	3,830	3.94	1.77	0.75–1.25	256
16 × 21	5,027	5.17	2.33	0.75–1.25	336
21 × 21	6,597	6.78	3.05	0.75–1.25	441
21 × 26	8,168	8.4	3.78	0.75–1.25	546
26 × 26	10,113	10.4	4.68	0.75–1.25	676

¹ Two feet deep

² Quantity may differ depending on stone type