193
Technical Resources
Conversion Tables
The fuid transfer community uses both the International System of
Units (Metric System) and the U.S. Customary System. The tables on
these two pages provide easy cross-referencing of commonly used
units of measure. To access automatic conversion calculation tools,
please search for “Conversion Tools” on the IDEX Health & Science
website: www.idex-hs.com.
Decimal Inches
Fractional Inches
Metric
0 . 031”
1/32”
0 . 79 mm
0 . 062”
1/16”
1 . 57 mm
0 . 125”
1/8”
3 . 18 mm
0 . 188”
3/16”
4 . 78 mm
0 . 250”
1/4”
6 . 35 mm
0 . 313”
5/16”
7 . 95 mm
0 . 375”
3/8”
9 . 53 mm
0 . 438”
7/16”
11 . 13 mm
0 . 500”
1/2”
12 . 70 mm
0 . 563”
9/16”
14 . 30 mm
0 . 625”
5/8”
15 . 88 mm
0 . 688”
11/16”
17 . 48 mm
0 . 750”
3/4”
19 . 05 mm
0 . 813”
13/16”
20 . 65 mm
0 . 875”
7/8”
22 . 23 mm
0 . 938”
15/16”
23 . 83 mm
1”
1”
2 . 54 cm
2”
2”
5 . 08 cm
3”
3”
7 . 62 cm
4”
4”
10 . 16 cm
5”
5”
12 . 70 cm
6”
6”
15 . 24 cm
7”
7”
17 . 78 cm
10”
10”
25 . 40 cm
Dimensions – Inches to Metric
Metric
Decimal Inches
1.0 mm
0.039”
1.8 mm
0.071”
2.0 mm
0.079”
3.0 mm
0.118”
3.2 mm
0.126”
4.0 mm
0.157”
4.3 mm
0.169”
4.6 mm
0.181”
5.0 mm
0.197”
6.0 mm
0.236”
7.0 mm
0.276”
8.0 mm
0.315”
9.0 mm
0.354”
1.0 cm
0.394”
2.0 cm
0.787”
3.0 cm
1.181”
4.0 cm
1.575”
5.0 cm
1.969”
6.0 cm
2.362”
7.0 cm
2.756”
8.0 cm
3.150”
9.0 cm
3.543”
10.0 cm
3.937”
Dimensions – Metric to Inches
Conversion Desired
Formula
Inches to millimeters
Inches x 25.4 mm/in.
Inches to centimeters
Inches x 2.54 cm/in.
Inches to microns
Inches x 25.4 mm/in. x 1000 µm/mm
Diameter in inches to linear volume (µL/inch)* 12870.4 (d
2
)
Diameter in µm to linear volume (µL/cm)*
7.85 x 10
-6
(d
2
)
Celsius to Fahrenheit
(Celsius x 9/5) + 32
Fahrenheit to Celsius
(Fahrenheit - 32) x 5/9
psi to bar
psi x 0.06894757
psi to MPa
psi x 0.00689476
psi to torr
psi x 51.7150733
psi to ATM
psi x 0.06804596
*d = internal diameter
Conversion Factors
Celsius (
o
C)
Fahrenheit (
o
F)
0
32
1
34
5
41
10
50
15
59
20
68
25
77
30
86
35
95
40
104
45
113
50
122
55
131
60
140
65
149
70
158
75
167
80
176
85
185
90
194
95
203
100
212
105
221
110
230
115
239
120
248
125
257
130
266
135
275
140
284
145
293
150
302
155
311
160
320
165
329
170
338
175
347
180
356
185
365
190
374
195
383
200
392
205
401
210
410
215
419
Temperature
FOR ORDERING & DISTRIBUTOR INFORMATION +1 800 426 0191 • +1 360 679 2528 • www.idex-hs.com