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Field Manual 3-34.331 TOPOGRAPHIC SURVEYING 16 January 2001

TOC Chap1 2 3 4 5 6 7 8 9 10 11 AppA AppB AppC AppD Gl Bib

### Appendix A

## Mensural Conversion Charts

This appendix complies with current army directives, which state that the metric system will be incorporated into all new publications. Table A-1 is a metric conversion chart and Table A-2 shows conversion factors for temperature, angles, and time.

Table A-1. Metric Conversion Chart

US Units | Multiplied By | Equals Metric Units | Metric Units | Multiplied By | Equals US Units
Length
Inches | 2.5400 | Centimeters | Centimeters | 0.39370 | Inches
Inches | 25.4001 | Millimeters | Millimeters | 0.03937 | Inches
Feet | 0.3048 | Meters | Meters | 3.28080 | Feet
Yards | 0.9144 | Meters | Meters | 1.09360 | Yards
Miles | 1.6093 | Kilometers | Kilometers | 0.62140 | Miles
Miles, Nautical | 1.8532 | Kilometers | Kilometers | 0.53960 | Miles, Nautical
Area
Square miles | 2.590 | Square kilometers | Square kilometers | 0.38500 | Square miles
Volume
Gallons | 3.7854 | Liters | Liters | 0.26420 | Gallons
Mass (Weight)
Pounds | 0.4536 | Kilograms | Kilograms | 2.20460 | Pounds

Table A-2. Temperature, Angle, and Time Conversion Chart

Units | Multiplied By | Equals | Units | Multiplied By | Equals
--- | --- | --- | --- | --- | ---
Temperature
Degrees (F) - 32 | 0.5556 | Degrees (C) | Degrees (C) + 17.8 | 1.8000 | Degrees (F)
Angle
Degrees (angular) | 17.7778 | Mils | Mils | 0.0562 | Degrees (angular)
Time
Seconds | 0.001 | Milliseconds | Milliseconds | 1,000 | Seconds
Seconds | 0.000000001 | Nanoseconds | Nanoseconds | 1,000,000,000 | Seconds