Skip to contentUnited States Department of Transportation - Federal Highway Administration FHWA Home
Research Home   |   Pavements Home
Report
This report is an archived publication and may contain dated technical, contact, and link information
Publication Number: FHWA-HRT-06-132
Date: December 2006

Long-Term Pavement Performance Program Manual for Falling Weight Deflectometer Measurements

Appendix C: Unit Conversions for Common Fwd-Related Measurements

Deflection
mils (inch * 10-3)microns (meter * 10-6)
16406
24610
802032
microns = mils * 25.4
 
Load
kips (pound * 103)kN (Newton * 103)kPa (Pascal * 103)(for 300 mm diameter plate)
6 (5.4 to 6.6)26.7 (24.0 to 29.4)378 (340 to 416)
9 (8.1 to 9.9)40.0 (36.0 to 44.0)566 (509 to 662)
12 (10.8 to 13.2)53.4 (48.1 to 58.7)755 (680 to 830)
16 (14.4 to 17.6)71.2 (64.1 to 78.3)1007 (907 to 1108)
kN = kip * 4.448 
 kPa = kN * 14.15
(for 300 mm-diameter (11.81-inch) plate only)
 
Temperature
FahrenheitCelsius
0-17.8
320
7021.1
10037.8
°C = (°F - 32) * 5/9
 
Distance
feetmeters
123.66
144.27
257.62
5015.2
10030.4
500152.4
1000304.8
meters = feet * 0.3048

Previous | Contents 


The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT).
The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). Provide leadership and technology for the delivery of long life pavements that meet our customers needs and are safe, cost effective, and can be effectively maintained. Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
FHWA
United States Department of Transportation - Federal Highway Administration