GENERAL INFORMATION AND MAINTENANCE 1-83
ENGLISH TO METRIC CONVERSION: PRESSURE
The basic unit of pressure measurement used today is expressed as pounds per square inch (psi). The metric unit for psi
will be the kilopascal (kPa). This will apply to either fluid pressure or air pressure, and will be frequently seen in tire
pressure readings, oil pressure specifications, fuel pump pressure, etc.
To convert pounds per square inch (psi) to kilopascals (kPa): multiply the number of psi by 6.89
Psi
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1 2 3 4 5 6 7 8 910
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36kPa
0.7
1.4
2.1
2.8
3.4
4.1
4.8
5.5
6.2
6.9
13.8
20.7
27.6
34.5
41.4
48.3
55.2
62.1
69.0
75.8
82.7
89.6
96.5
103.4
110.3
117.2
124.1
131.0
137.9
144.8
151.7
158.6
165.5
172.4
179.3
186.2
193.0
200.0
206.8
213.7
220.6
227.5
234.4
241.3
248.2Pii
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55i 56
57
58
59
60
61
62
63
64
65
66
67
68
..... 6970
71
72
73
74
75
76
77
78
79
80
81kPa255.1
262.0
268.9
275.8
282.7
289.6
296.5
303.4
310.3
317.2
324.0
331.0
337.8
344.7
351.6
358.5
365.4
372.3
379.2
386.1
393.0
399.9
406.8
413.7
420.6
427.5
434.4
441.3
448.2
455.0
461.9
468.8
475.7
482.6
489.5
496.4
503.3
510.2
517.1
524.0
530.9
537.8
544.7
551.6
558.5Psi82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114"
115
116
117
118
119
120
121
122
123
124
125
126kPa
565.4
572.3
579.2
586.0
592.9
599.8
606.7
613.6
620.5
627.4
634.3
641.2
648.1
655.0
661.9
668.8
675.7
682.6
689.5
696.4
703.3
710.2
717.0
723.9
730.8
737.7
744.6
751.5
758.4
765.3
772.2
779.1
7861)
792.9
799.8
806.7
813.6
820.5
827.4
834.3
841.2
848.0
854.9
861.8
868.7Psi
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
T59
160
161
162
163
164
165
166
167
168
169
170
171kPa875.6
882.5
889.4
896.3
903.2
910.1
917.0
923.9
930.8
937.7
944.6
951.5
958.4
965.2
972.2
979.0
985.9
992.8
999.7
1006.6
1013.5
1020.4
1027.3
1034.2
1041.1
1048.0
1054.9
1061.8
1068.7
1075.6
1082.5
1089.4
7096.3 "
1103.2
1110.0
1116.9
1123.8
1130.7
1137.6
1144.5
1151.4
1158.3
1165.2
1172.1
1179.0