Pipe Tools & Calculators

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Metric Conversion Tables

PIPE SIZE METRIC CONVERSION TABLE
DIAMETER
NOMINAL SIZE OD
mm Inches mm Inches
3 1/8 10.3 .405
6 1/4 13.7 .540
10 3/8 17.1 .675
13 1/2 21.3 .840
19 3/4 26.7 1.050
25 1 33.4 1.315
32 1 1/4 42.2 1.660
40 1 1/2 48.3 1.900
50 2 60.3 2.375
65 2 1/2 73.0 2.875
80 3 88.9 3.500
90 3 1/2 101.6 4.000
100 4 114.3 4.500
125 5 141.3 5.563
150 6 168.3 6.625
200 8 219.1 8.625
250 10 273.0 10.750
300 12 323.8 12.750
350 14 355.6 14.000
400 16 406.4 16.000
460 18 457.2 18.000
510 20 508.0 20.000
560 22 558.8 22.000
610 24 609.6 24.000
660 26 660.4 26.000
Standard to Metric Conversion Chart
SYMBOL WHEN YOU KNOW MULTIPLY BY TO FIND SYMBOL
LENGTH
in inches 25.4 millimeters mm
ft feet 0.305 meters m
yd yards 0.914 meters m
mi miles 1.61 kilometers km
AREA
in2 square inches 645.2 square millimeters mm2
ft2 square feet 0.093 square meters m2
yd2 square yard 0.836 square meters m2
ac acres 0.405 hectares ha
mi2 square miles 2.59 square kilometers km2
VOLUME
fl oz fluid ounces 29.57 milliliters mL
gal gallons 3.785 liters L
ft3 cubic feet 0.028 cubic meters m3
yd3 cubic yards 0.765 cubic meters m3
MASS
oz ounces 28.35 grams g
lb pounds 0.454 kilograms kg
T short tons (2000 lb) 0.907 megagrams (or “metric ton”) Mg (or “t”)
TEMPERATURE
oF Fahrenheit (F-32) x 5 / 9
or
(F-32) / 1.8
Celsius oC
ILLUMINATION
fc foot-candles 10.76 lux lx
fl foot-Lamberts 3.426 candela/m2 cd/m2
FORCE and PRESSURE or STRESS
lbf poundforce 4.45 newtons N
lbf/in2 poundforce per square inch 6.89 kilopascals kPa
Metric to Standard Conversions
SYMBOL WHEN YOU KNOW MULTIPLY BY TO FIND SYMBOL
LENGTH
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
mm2 millimeters 0.0016 square inches in2
m2 square meters 10.764 square feet ft2
m2 square meters 1.195 square yards yd2
ha hectares 2.47 acres ac
km2 square kilometers 0.386 square miles mi2
VOLUME
mL milliliters 0.034 fluid ounces fl oz
L liters 0.264 gallons gal
m3 cubic meters 35.314 cubic feet ft3
m3 cubic meters 1.307 cubic yards yd3
MASS
g grams 0.035 ounces oz
kg kilograms 2.202 pounds lb
Mg (or “t”) megagrams
(or “metric ton”)
1.103 short tons (2000 lb) T
TEMPERATURE
oC Celsius 1.8C + 32 Fahrenheit oF
ILLUMINATION
lx lux 0.0929 foot-candles fc
cd/m2 candela/m2 0.2919 foot-Lamberts fl
FORCE and PRESSURE or STRESS
N newtons 0.225 poundforce lbf
kPa kilopascals 0.145 poundforce per square inch lbf/in2
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