IdBL Square Inch Conversion Chart

 

 

division A (industry)

1-720.99 sq. inches

721-2160.99 sq. inches

2161+ sq. inches

division B (consumer)

1-160.99 sq. inches

161-360.99 sq. inches

361-720.99 sq.inches

721-1440.99 sq. inches

1441-2160.99 sq. inches

2161+ sq. inches


Woofer Diameter

6.5

8

10

12

15

18

Woofer Quantity

Total Square Inches

1

33.17

50.24

78.50

113.04

176.63

254.34

2

66.33

100.48

157.00

226.08

353.25

508.68

3

99.49

150.72

235.50

339.12

529.87

763.02

4

132.65

200.96

314.00

452.16

706.49

1017.36

5

165.81

251.20

392.50

565.20

883.11

1271.70

6

198.97

301.44

471.00

678.24

1059.73

1526.04

7

232.13

351.68

549.50

791.28

1236.35

1780.38

8

265.29

401.92

628.00

904.32

1412.97

2034.72

9

298.45

452.16

706.50

1017.36

1589.59

2289.06

10

331.61

502.40

785.00

1130.40

1766.21

2543.40

11

364.77

552.64

863.50

1243.44

1942.83

2797.74

12

397.93

602.88

942.00

1356.48

2119.45

3052.08

13

431.09

653.12

1020.50

1469.52

2296.07

3306.42

14

464.25

703.36

1099.00

1582.56

2472.69

3560.76

15

497.41

753.60

1177.50

1695.60

2649.31

3815.10

16

530.57

803.84

1256.00

1808.64

2825.93

4069.44

17

563.73

854.08

1334.50

1921.68

3002.55

4323.78

18

596.89

904.32

1413.00

2034.72

3179.17

4578.12

19

630.05

954.56

1491.50

2147.76

3355.79

4832.46

20

663.21

1004.80

1570.00

2260.80

3532.41

5086.80

21

696.37

1055.04

1648.50

2373.84

3709.03

5341.14

22

729.53

1105.28

1727.00

2486.88

3885.65

5595.48

23

762.69

1155.52

1805.50

2599.92

4062.27

5849.82

24

795.85

1205.76

1884.00

2712.96

4238.89

6104.16

25

829.01

1256.00

1962.50

2826.00

4415.51

6358.50

26

862.17

1306.24

2041.00

2939.04

4592.13

6612.84

27

895.33

1356.48

2119.50

3052.08

4768.75

6867.18

28

928.49

1406.72

2198.00

3165.12

4945.37

7121.52

29

961.65

1456.96

2276.50

3278.16

5121.99

7375.86

30

994.81

1507.20

2355.00

3391.20

5298.61

7630.20

31

1027.97

1557.44

2433.50

3504.24

5475.23

7884.54

32

1061.13

1607.68

2512.00

3617.28

5651.85

8138.88

33

1094.29

1657.92

2590.50

3730.32

5828.47

8393.22

34

1127.45

1708.16

2669.00

3843.36

6005.09

8647.56

35

1160.61

1758.40

2747.50

3956.40

6181.71

8901.90

36

1193.77

1808.64

2826.00

4069.44

6358.33

9156.24

37

1226.93

1858.88

2904.50

4182.48

6534.95

9410.58

38

1260.09

1909.12

2983.00

4295.52

6711.57

9664.92

39

1293.25

1959.36

3061.50

4408.56

6888.19

9919.26

40

1326.41

2009.60

3140.00

4521.60

7064.81

10173.60

41

1359.57

2059.84

3218.50

4634.64

7241.43

10427.94

42

1392.73

2110.08

3297.00

4747.68

7418.05

10682.28

43

1425.89

2160.32

3375.50

4860.72

7594.67

10936.62

44

1459.05

2210.56

3454.00

4973.76

7771.29

11190.96

45

1492.21

2260.80

3532.50

5086.80

7947.91

11445.30

46

1525.37

2311.04

3611.00

5199.84

8124.53

11699.64

47

1558.53

2361.28

3689.50

5312.88

8301.15

11953.98

48

1591.69

2411.52

3768.00

5425.92

8477.77

12208.32

49

1624.85

2461.76

3846.50

5538.96

8654.39

12462.66

50

1658.01

2512.00

3925.00

5652.00

8831.01

12717.00

51

1691.17

2562.24

4003.50

5765.04

9007.63

12971.34

52

1724.33

2612.48

4082.00

5878.08

9184.25

13225.68

53

1757.49

2662.72

4160.50

5991.12

9360.87

13480.02

54

1790.65

2712.96

4239.00

6104.16

9537.49

13734.36

55

1823.81

2763.20

4317.50

6217.20

9714.11

13988.70

56

1856.97

2813.44

4396.00

6330.24

9890.73

14243.04

57

1890.13

2863.68

4474.50

6443.28

10067.35

14497.38

58

1923.29

2913.92

4553.00

6556.32

10243.97

14751.72

59

1956.45

2964.16

4631.50

6669.36

10420.59

15006.06

60

1989.61

3014.40

4710.00

6782.40

10597.21

15260.40

61

2022.77

3064.64

4788.50

6895.44

10773.83

15514.74

62

2055.93

3114.88

4867.00

7008.48

10950.45

15769.08

63

2089.09

3165.12

4945.50

7121.52

11127.07

16023.42

64

2122.25

3215.36

5024.00

7234.56

11303.69

16277.76

converted by: J. B. Schuren (aka The Chiccin, FHLH)