FLOOD06021

• County: Larimer
• Stream Name: Big Thompson
• Basin: South Platte
• Title: Flood History of the Big Thompson River Basin: Flash Floods, Paleofloods, and Dam-Break Floods
• Date: 1/1/1979
• Prepared For: Larimer
• Prepared By: USGS
• Floodplain - Doc Type: Flood Documentation Report

-

October 1.1978

FACTORS FOR CONVERTING INCH-POUND UNITS TO INTERNATIONAL
SYSTEM UNITS (SI)

The following factors may be used to convert the inch-pound units published herein to
the International System of Units (SI).

,Multiply inch-pound units

By

Length

2.54x10'
2.54x1O"'
3.048x1O"'
l.609xlOo

in,hes (in)

rect (ft)
miles (mi)

Area

acres

4.047xlO'
4.047x1O"'
4.047xI0"'
2.590x I 00

square miles (mi')

Volume

gallons (gal)

3. 785x I 0"
3. 785x 100
3. 785x I 0"'
3. 785x 10'
3.785xlO"'
2.832x10'
2.832x1O"'
2.447xI0'
2.447xI0"'
1.233xlO'
1.233x I 0"'
1.233xl0"6

million gallons
cubic feet (ft')
tfs-days

acre-feet (acre-ft)

Flow

cubic feet per second (ft'/s)

2.832x10'
2.832x10'
2.832x I 0"'
6.309x I 0"'
6.309x I 0"'
6.309xlO"'
4.38IxI0'
4.381 x I 0"'

gallons per minute (gal/min)

million gallons per day

Mass

tons (short)

9.072xlO"'

2-~

To obtain SI units

millimeters (mm)
meters (m)
meters (m)
kilometers (km)

square meters (m')
square hectometers (hm' )
square kilometers (km')
square kilometers (km')

liters (L)
cubic decimeters (dm')
cubic meters (m' )
cubic meters (m' )
cubic hectometers (hm' )
cubic decimeters (dm')
cubic meters (m')
cubic meters (m')
cubic hectometers (hm' )
cubic meters (m' )
cubic hectometers (hm' )
cubic kilometers (km')

liters per second (Lis)
cubic decimeters per second (dm' Is)
cubic meters per second (m'/s)
liters per second (Lis)
cubic decimeters per second (dm'/s)
cubic meters per second (m'/s)
cubic decimeters per second (dm'/s)
cubic meters per second (m' Is)

megagrams (Mg) or metric tons