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close this bookWater and Sanitation Technologies: A Trainer's Manual (Peace Corps, 1985)
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close this folderSession 5 - Math review
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View the documentAttachment 5A: Conversion chart

Attachment 5A: Conversion chart

Common Equivalents

* 1 cubic foot equals .0283 cubic meter
* 1 cubic foot equals 7.48 gallons
* 1 cubic foot of water equals 63.43 pounds
* 1 cubic yard equals. 7616 cubic meter
* 1 gallon equals 3.7854 liters
* 1 gallon equals 8.345 pounds of water
* 1 pound equals. 4536 kilogram
* 1 meter equals 39.37 inches
* 1 meter equals 3.2808 feet
* 1 meter equals 1.0936 yards
* 1 kilometer equals 3,281 feet
* 1 square meter equals 10.764 square feet
* 1 square meter equals 1.196 square yards
* 1 cubic centimeter equals 1 gram
* 1 cubic meter equals 35.314 cubic feet
* 1 cubic meter equals 1.308 cubic yards
* 1 liter equals 1.0567 quarts
* 1 liter of water equals 1 kilogram
* 1 kilogram equals 2.2046 pounds
* 1 atmosphere equals 14.7 psi at sea level
* 1 atmosphere equals 33.947 feet of water at 62 degrees F.
* 1 psi equals 2.309 feet of water at 62 degrees F.
* 1 psi equals .0703 kilograms per square centimeter
* 1 foot of water at 62 degrees F. equals .433 psi

Common Formulas

* To find the number of gallons in a Cylindrical Tank:
- Diameter in feet squared x. 7854 x 7.48

* To find the number of gallons in a Rectangular Tank:
- Length x Width x Height in feet x 7.48

* To find the Pressure in psi of a Column of Water:
- Height in feet x.434

* To find the Head in feet, the Pressure being known:
- Psi x 2.31

* To find the number of gallons in a foot of Pipe of any size:
- Square of the Diameter in inches x.0408

* To reduce Centigrade Temperature to Fahrenheit:
- Multiply the Centigrade temperature by 9, divide the result by 5, and add 32

* To reduce Fahrenheit Temperature to Centigrade:
- Subtract 32 from the Fahrenheit temperature, multiply by 5, and divide by 9

Conversion Factors

Multiply

By

To Obtain

Centigrams

.01

Grams

Centiliters

.01

Liters

Centimeters

.3937

Inches

Centimeters

.01

Meters

Centimeters

10

Millimeters




Centimeters/second

1.969

Feet/min.

Centimeters/second

.03281

Feet/sec.

Centimeters/second

.036

Kilometers/hr.

Centimeters/second

.6

Meters/min.

Centimeters/second

.02237

Miles/hr.




Cubic Feet

1728

Cubic inches

Cubic Feet

.02832

Cubic meters

Cubic Feet

.03704

Cubic yards

Cubic Feet

7.48

Gallons

Cubic Feet

28.32

Liters




Cubic Feet/minute

472.0

Cubic cms./sec.

Cubic Feet/minute

.1247

Gallons/sec.

Cubic Feet/minute

.4720

Liters/sec.

Cubic inches

16.39

Cubic cms.




Cubic Meters

1,000,000

Cubic cms.

Cubic Meters

35.31

Cubic feet

Cubic Meters

1.308

Cubic yards

Cubic Meters

264.2

Gallons

Cubic Meters

1,000

Liters

Cubic Meters

1,057

Quarts




Cubic Yards

27

Feet

Cubic Yards

46.656

Cubic inches

Cubic Yards

.7646

Cubic meters

Cubic Yards

202.0

Gallons

Cubic Yards

764.6

Liters

Cubic Yards

807.9

Quarts




Decigrams

.1

Grams

Deciliters

.1

Liters

Decimeters

.1

Meters




Feet

30.48

Centimeters

Feet

12

Inches

Feet

.3048

Meters

Feet of water

304.8

Kgs./sq.meters

Feet of water

62.43

Lbs./sq.ft.

Feet of water

.433

Lbs./sq.inch




Feet/minute

.5080

Cms./second

Feet/minute

.01667

Feet/second

Feet/minute

.3048

Meters/minute

Feet/second

30.48

Cms./second

Feet/second

18.29

Meters/minute




Gallons

3785

Cubic cms.

Gallons

.1337

Cubic feet

Gallons

231

Cubic inches

Gallons

3.785

Liters

Gallons

4

Quarts

Gallons

8.345

Pounds of water

Gallons/minute

2.228 x.001

Cubic feet/sec.

Gallons/minute

.06308

Liters/sec.

Gallons/minute

8.0208

Cubic feet/hr.




Grams

.001

Kilograms

Grams

1,000

Milograms

Grams

.03527

Ounces

Hectares

2.471

Acres

Inches

2.54

Centimeters




Kilometers

100,000

Centimeters

Kilometers

3,281

Feet

Kilometers

1,000

Meters

Kilometers

.6214

Miles

Kilometers

1,094

Yards

Kilometers/hr.

16.67

Meters/minute

Kilometers/hr.

.6214

Miles/hr.




Liters

1,000

Cubic cms.

Liters

.03531

Cubic feet

Liters

61.02

Cubic inches

Liters

.001

Cubic meters

Liters

.2642

Gallons

Liters

1.057

Quarts




Meters

100

Centimeters

Meters

3.281

Feet

Meters

39.37

Inches

Meters

.001

Kilometers

Meters

1.094

Yards




Meters/minute

1.667

Cms./sec.

Meters/minute

3.281

Feet/minute

Meters/minute

.05468

Feet/sec.

Meters/second

196.8

Feet/minute

Meters/second

3.281

Feet/second




Miles

5,280

Feet

Miles

1.609

Kilometers

Miles

1,760

Yards

Millimeters

.1

Centimeters

Millimeters

.03937

Inches




Ounces

.0625

Pounds

Ounces

28.349

Grams

Pounds

16

Ounces

Pounds

453.592

Grams




Pounds/sq. Inch

2.307

Feet of water

Pounds/sq. Inch

.07031

Kg./sq. cm.

Pounds/sq. Inch

.7031

Meters of water

Square Centimeters

100

Sq. millimeters

Square Centimeters

.0001

Sq. meters

Square Centimeters

.1550

Sq. inches




Square Feet

929.0

Sq. cms.

Square Feet

144

Sq. inches

Square Feet

.09290

Sq. meters

Square Feet

1/9

Sq. yards




Square Inches

6.452

Sq. cms.

Square Inches

645.2

Sq. millimeters

Square Meters

10.76

Sq. feet

Square Meters

1.196

Sq. yards




Square Yards

9

Sq. feet

Square Yards

.8361

Sq. meters

Yards

91.44

Centimeters

Yards

3

Feet

Yards

36 -

Inches

Yards

.9144

Meters