Trail Construction and Maintenance Notebook

Metric Conversions

To convert from this unit	To this unit	Multiply by
inch	millimeter	25.4*
inch	centimeter	2.54*
foot	meter	0.3048*
yard	meter	0.9144*
mile	kilometer	1.6
millimeter	inch	0.039
centimeter	inch	0.394
centimeter	foot	0.0328
meter	foot	3.28
meter	yard	1.09
kilometer	mile	0.62
acre	hectare (square hectometer)	0.405
square kilometer	square mile	0.386*
hectare (square hectometer)	acre	2.47
ounce (avoirdupois)	gram	28.35
pound (avoirdupois)	kilogram	0.45
ton (2,000 pounds)	kilogram	907.18
ton (2,000 pounds)	megagram (metric ton)	0.9
gram	ounce (avoirdupois)	0.035
kilogram	pound (avoirdupois)	2.2
megagram	ton (2,000 pounds)	1.102
ounce (U.S. liquid)	milliliter	30
cup	milliliter	247
cup	liter	0.24
gallon	liter	3.8
quart	liter	0.95
pint	liter	0.47
milliliter	ounce (U.S. liquid)	0.034
liter	gallon	0.264
liter	quart	1.057
degrees Fahrenheit	degrees Celsius	(°F - 32) ÷ 1.8
degrees Celsius	degrees Fahrenheit	(°C x 1.8) + 32
*The conversion factors with asterisks are exact (the others give approximate conversions).

A millimeter, one-thousandth of a meter, is about the thickness of a dime.
One inch is just 1/64 inch longer than 25 millimeters (1 inch = 25.4 millimeters).
150 millimeters is the length of a dollar bill.
One foot is about 3/16 inch longer than 300 millimeters (12 inches = 304.8 millimeters).
A meter is a little longer than a yard, about a yard plus the width of this notebook.
A kilometer is about five-eighths of a mile.

1 kilometer
|<--------------------------------------->|

1 mile
|<---------------------------------------------------------------------->|