USGS CD-ROM: CONVERSION FACTORS AND VERTICAL DATUM

CONVERSION FACTORS

Multiply  By  To obtain 
 
Length
inch (in.)  2.54x101 millimeter 
2.54x10-2 meter 
foot (ft)  3.048x10-1 meter 
mile (mi)  1.609x100 kilometer 
 
Area
acre  4.047x103 square meter 
4.047x10-1 square hectometer 
4.047x10-3 square kilometer 
square mile (mi2 2.590x100 square kilometer
 
Volume
gallon (gal)  3.785x100 liter 
3.785x10-3 cubic meter 
3.785x100 cubic decimeter 
million gallons (Mgal)  3.785x103 cubic meter 
3.785x10-3 cubic hectometer 
cubic foot (ft3 2.832x10-2 cubic meter 
2.832x101 cubic decimeter 
cubic-foot-per-second day [(ft3/s)d]  2.447x103 cubic meter 
2.447x10-3 cubic hectometer 
acre-foot (acre-ft)  1.223x103 cubic meter 
1.223x10-3 cubic hectometer 
1.223x10-6 cubic kilometer 
 
Flow Rate
cubic foot per second (ft3/s)  2.832x101 liter per second
2.832x10-2 cubic meter per second 
2.832x101 cubic decimeter per second 
gallon per minute (gal/min)  6.309x10-2 liter per second 
6.309x10-5 cubic meter per second 
6.309x10-2 cubic decimeter per second 
million gallons per day (Mgal/d)  4.381x10-2 cubic meter per second
4.381x101 cubic decimeter per second 
Velocity
feet per second (ft/s)  1.097x100 kilometers per hour
3.048x10-1 meters per second
miles per hour (mph) 1.609x100 kilometers per hour
0.4469x100 meters per second
 
Mass
ton,  short (2,000 lb)  9.072x10-1 megagram (Mg) or metric ton
 
Radiation
Langleys per hour (Lg/hr) 11.63x100 watts per square meter 
 

Temperature in degrees Celsius (oC) may be converted to degrees Fahrenheit (oF) as follows:  oF = (1.8 x oC) + 32



Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data