Take the pain out of converting measures and sieve sizes with these charts showing the relationships between U.S. customary units and SI (International System) units for commonly needed values like length, area, volume, mass, temperature & density.
SI (MODERN METRIC) CONVERSION FACTORS
Symbol
When you know
Multiply by
To find
Symbol
LENGTH
[none]
MIL
25.4
MICROMETERS
mm
in
INCHES
25.4
MILLIMETERS
mm
ft
FEET
0.305
METERS
m
yd
YARDS
0.914
METERS
m
mi
MILES
1.61
KILOMETERS
km
mm
MICROMETERS
0.039
MIL
[none]
mm
MILLIMETERS
0.039
INCHES
in
m
METERS
3.28
FEET
ft
m
METERS
1.09
YARDS
yd
km
KILOMETERS
0.621
MILES
mi
AREA
in
2
SQUARE INCHES
645.2
SQUARE MILLIMETERS
mm
2
ft
2
SQUARE FEET
0.093
SQUARE METERS
m
2
yd
2
SQUARE YARDS
.0836
SQUARE METERS
m
2
ac
ACRES
0.405
HECTARES
ha
mi
2
SQUARE MILES
2.59
SQUARE KILOMETERS
km
2
mm
2
SQUARE MILLIMETERS
0.0016
SQUARE INCHES
in
2
m
2
SQUARE METERS
10.764
SQUARE FEET
ft
2
m
2
SQUARE METERS
1.195
SQUARE YARDS
yd
2
ha
HECTARES
2.47
ACRES
ac
km
2
SQUARE KILOMETERS
0.386
SQUARE MILES
mi
2
VOLUME
fl oz
FLUID OUNCES
29.57
MILLILITERS
mL
gal
GALLONS
3.785
LITERS
L
ft
3
CUBIC FEET
0.028
CUBIC METERS
m
3
yd
3
CUBIC YARDS
0.765
CUBIC METERS
m
3
mL
MILLILITERS
0.034
FLUID OUNCES
fl oz
L
LITERS
0.264
GALLONS
gal
m
3
CUBIC METERS
35.71
CUBIC FEET
ft
3
m
3
CUBIC METERS
1.307
CUBIC YARDS
yd
3
MASS
oz
OUNCES
28.35
GRAMS
g
lb
POUNDS
0.454
KILOGRAMS
kg
T
SHORT TONS
(2000 LBS.)
0.907
MEGAGRAMS
Mg
(or T)
g
GRAMS
0.035
OUNCES
oz
kg
KILOGRAMS
2.202
POUNDS
lb
Mg
(or T)
MEGAGRAMS
1.103
SHORT TONS
(2000 LBS.)
T
m
3
CUBIC METERS
35.71
CUBIC FEET
ft
3
m
3
CUBIC METERS
1.307
CUBIC YARDS
yd
3
