UNIT·CONVERSIONS
.Aim..\
l ~q6~te:z~timeter = 0.155 square inch
t sg~~te nietyr = 10.764 square reet
l li.ootare = 2.411 acres
1 hebt~re ...... io,ooo square meters
l s.quare kilometer = 0.3863 square miles
l lleerare = 0.003863 square :miles
DENSITY
1 square in()'h = 6.4516 square centimeters
1 sq.u~re. foot = 0.0929 square meters
1 acre = 0.4047 hedare~
l acre = 43tS60 square feet
i square rnHe = 2.589 squn.re kilometers
1 square mile = 2S8.9 hectares
1000 kilograms per cubic rneter = L 94. shtgs per- t:ubk foot
1 slug per cubic foot = SlS.S kilograms per cubic meter
DISCHARGE (FLOW RATE}
1 cubic meter pet second = 35.31:5 cubic foot per second
i eub1c foot per second = 0.028317 cubic meters per second
1000 .gallons per rninute ::;;;: 2.2tJ.8 c~bic, fee~ per second
1 milllo.n gallon.:; per d~~ = 0;043.8 cu1;)lc lT\Ct
.ENERGY (\VORKOR QU
1 joule ·= l newton·;rne:ter
l j.mde =
1 calorie =
1 kilowatt~hou:r =
1 kilowatt ·

FORCE (WEIGHT!
l ne\vtotl ;;:::;: 0.2247 pounds
1 kilogram = 2.2046 pounds
l kilogram. = 9.81 new't<rtls
l metric ton = 1()()0 kilograms
l rnetric ton = 9.8.1 kilonewtons
l metric ton = 2204.6 pounds
LENGTH (DISTANCE)
1 millim~ter = 0.03937 inches
l centimeter = 0.3937 inches
l meter = 3.281 fee.t
1 .kilorueter = 0.6215 miles
l meter= L0936 yards
MASS
l kilogram = 2.2046 pounds
I kilogram = 0.0685 slugs
POWER
1 watt = l jolde per second
1 watt = 1 newton-meter per s~ond
1 kilowatt = t .341. horsepower
l pascal = l .ne'wton pi$.r square meter
1 kilopascal = 1000 pascal
l kilopascal = 0.145 Ib per square inch
l pound = 4.45 newtons
I pound = 0.4536 kilograms
1 ton = 2000 pounds
l ton = 0. 9012 metric tons
l inch = 2SA millimeters
l inch '= 2.:54 centimeters
1 fo<>t = 0.3048 m~ters
1 mile = L609 kilometers
1 yard = 0.9144 meters
1 pound .::::::. 0.4536 kilogram.s
l slug = 14.6 kilograms
1 horsepower = 550 foot-pound per second
l horsepower = 746 watts
1 horsepower = 0. 746 kil.owatts
l lb per square lnc.h = 6.8972 kilopasca!s
1 lb per square inch = 689't2 pascals

SPECIFIC WEIGHT
l newton pt:r cubic meter = (L0063636 p<>unds pet cubic foot
l pound per cubic foot = 14 n¢wions per c~1bic meter
VELOCITY
1 meter per second = 3.28 fe-et per second
I kilometer pt.:r hour = 0.6215 miles pet
hour
VlSCOSlTY !ABSOLUTE)
1 poise = 0.1 .tH!\Vton"second per square
meter
= 0.0020878 lb.second square
foot
l centipoise = 0.01 poise
VISCOSITY (KINEMATlC)
I stoke = 1 square centimeter per second
l centistoke = O.Ol stoke
1 centistoke ±::::: 0.000001 stzuare meter per
second
l centistoke = 0.000010764 square feet per
second
VOLUI\tE
1 liter = 0.1642 U . . gallons
l liter = 0.03531:5 cubic feet
t liter = 0.001 cubic meter
l cubic meter = 35,315 cubic feet
1 cubic meter= 1.308 cubic yards
1 cubic meter = 264.%7 U.S. gallons
l cubic hectometer = l million cubic rneters
1 cu hie hectometer = 81.0. 7! acre· feet
10,000 cubic meters == 4.0873 (ft3 f:sl·day
! foot per second = 0.3048 met~rs pet
serond
1 mile per hour :::=: 1.609 kilometers per
hour
l HHeeond per square foot = 478.97 poise
l lb·second per square foot = 47897
centipoise
1 square foot per second = 929.03 stoke
1 square foot per second = 92,903
centistol-:e
1 U.S. gaJlon = 3. 78541itcrs
1 cubic foot = 28.317 liters
l U.S. gallon = 0.13368 cubic feet
l cu bic foot = 0.028311 cubic meters
l cubic yard = 0. 7646 cubic meters
1 m.illirm U.S. gallons = 3185.4 <:ubi.c
meters
1 million cubic .feet= 28,317 cubk meters
l acre·foot = l2JJ.S cubic meters
l (ffls)·day = 2446.6 cubic meters
l (ftl/ s).day ; 1.983 acre·feet

•
COMMON CONSTANTS
·GRAVITATIONAL ACC.ELERATION
9.8l' t:ttet~rs per square second
98t,centimeters per square second
TI OF W ATEB (:4.T. 4°C)
1000 kilograms per cubic meter
I gram per cubic centimeter
t ~md 760 mm Hg:
kiLoriewtons per cubic meter
.2°C and 760 mm Hg:
9.789 k'ilonewtons per cubic meter
32...t7 feet persquare second
1. 94 slugs per cubk foot
L94 (lb·f)-s2'/ft4
62.43 tb·f cubic foot
61.32 lb~f per cubic foot
ARD SEA-LEVE.L AT!VlO.SPHERIC PRESSURE
per square meter
eters of Hg
meters of H20
l4.7lb per square inch
29.92 in. Hg
33,9 ft o.f H20