ESTIMATING TOTAL GALLONS IN A POOL OR SPA

Units of measure

UNIT INCH FOOT YARD METER
INCH 1 0.0833 0.0278 0.0254
FOOT 12 1 0.333 0.305
YARD 36 3 1 0.9144
METER 39.37 3.281 1.094 1
UNITS OF AREA
UNIT SQUARE INCH SQUARE FOOT SQUARE YARD SQUARE METER
SQUARE INCH 1 0.00694 0.000772 0.000645
SQUARE FOOT 144 1 0.1111 0.0929
SQUARE YARD 1,296 9 1 0.836
SQUARE METER 1,550 10.76 1.196 1
UNITS OF VOLUME
UNIT U.S. GALLON GALLON CUBIC FEET POUNDS OF WATER CUBIC METERS
U.S. GALLON 1 .833 .1337 8.33 0.003785
IMPERIAL GALLON 1.2 1.0 .1605 10 0.004546
CUBIC FEET 7.481 6.232 1.0 62.37 0.0283
POUNDS OF WATER 0.12 .09996 .0160 1 0.00045
CUBIC METERS 264.2 220.0 35.31 2204 1
UNITS OF FLOW
UNIT U.S. G.P.M. IMPERIAL CUBIC FEET/G.P.M. SECOND CUBIC FEET/HOUR LITERS/SECOND
U.S. G.P.M. 1 .833 .00223 8.02 0.0631
IMPERIAL G.P.M. 1.2 1.0 .00268 9.63 0.0757
CUBIC FT. PER SECOND 448.8 374.0 1.0 3.6 28.32
CUBIC FT. PER HOUR 0.125 .104 .00028 1 0.0078
LITERS PER SECOND 15.85 13.21 .0353 127.13 1
UNITS OF PRESSURE
UNIT INCHES OF WATER FEET OF WATER POUNDS PER SQUARE INCH INCHES OF MERCURY
INCHES OF WATER 1 0.0833 0.0361 0.0736
FEET OF WATER 12 1 0.433 0.883
POUNDS PER SQUARE INCH 27.72 2.31 1 2.04
INCHES OF MERCURY 13.596 1.133 0.4906 1

Equivalent head of water

Lbs. per Sq. In. Lbs. perFeet Head Sq. In. Feet Head Lbs. per Sq. In. Feet Head Lbs. per Feet HeadSq. In.
1 2.31 20 46.18 120 276.42 225 519.23
2 4.62 25 57.72 125 288.46 250 576.92
3 6.93 30 69.27 130 300 275 634.62
4 9.24 40 92.36 140 323.08 300 692.31
5 11.54 50 115.38 150 346.15 325 750.00
6 13.85 60 138.46 160 369.23 350 807.69
7 16.16 70 161.53 170 392.31 375 865.38
8 18.47 80 184.62 180 415.38 400 923.08
9 20.78 90 207.69 190 438.46 500 1153.85
10 23.09 100 230.77 200 461.54 1000 2307.69
15 34.63 110 253.85

Equivalent values of pressure

Inches of Mercury Feet of Water Pounds per_x000D_Sq. In. Inches of_x000D_Mercury Feet of Water Pounds per_x000D_Sq. In. Inches of_x000D_Mercury Feet of Water Pounds per_x000D_Sq. In.
1 1.13 0.49 11 12.45 5.39 21 23.78 10.3
2 2.26 0.98 12 13.57 5.87 22 24.88 10.8
3 3.39 1.47 13 14.7 6.37 23 26 11.28
4 4.52 1.95 14 15.82 6.86 24 27.15 11.75
5 5.65 2.44 15 16.96 7.35 25 28.26 12.25
6 6.78 2.93 16 18.09 7.84 26 29.4 12.73
7 7.91 3.42 17 19.22 8.33 27 30.52 13.23
8 9.04 3.91 18 20.35 8.82 28 31.65 13.73
9 10.17 4.4 19 26.47 9.31 29 32.8 14.22
10 11.3 4.89 20 22.6 9.8 29.929 33.947 14.6969

Current capacity(Amps) of wire

AMPERES AMPERES
WIRE SIZE COPPER ALUMINIUM
14 20
12 25 20
10 30 25
8 40 30
6 55 40
4 70 55
3 85 65
2 95 75
1 110 85
125 100

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