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[vc_column_text css=””]Pressure is defined as a force exerted on a surface per unit area. To put it more simply, it’s the force that is put on a certain defined area.

It’s likely you’ll be familiar with the concept in everyday life – for example ‘feeling the pressure’ or ‘applying pressure to a wound’, but when it comes to pressure and tyres, it can be difficult to understand the measurements of pressure, and know where to find them, which is why we’re going to take you through it. There are three commonly used measurements of pressure in tyres – PSI, BAR and kPa, and depending on your vehicle, you may need to convert from one to another.

Your tyre inflation pressure depends on the amount of air that has been pumped into your tyre. It is measured in pounds per square inch (psi), bar or kPa. Your vehicle manufacturer recommends the suitable pressure for your tyres.[/vc_column_text][/vc_column][vc_column width=”1/2″][vc_single_image image=”2109″ img_size=”large”][/vc_column][/vc_row][vc_row css=”.vc_custom_1599832094437{padding-top: 40px !important;padding-bottom: 40px !important;}”][vc_column width=”1/2″]

[vc_column_text css=””]PSI is the most common means of measuring tyre pressure in countries that use the imperial system.  This includes the USA and UK. PSI stands for ‘pound-force per square inch’ and is an imperial unit of pressure based on avoirdupois units. It is defined as the pressure that results when a force of one pound-force is applied to a one-square-inch area. One psi is approximately 6,895 pascals (N/m2). It can measure everything from blood pressure to tyre pressure.

You will most likely need to convert from BAR or kPa to PSI if you live in a country that uses the imperial system and purchase a car from a country that uses the metric system.[/vc_column_text][/vc_column][vc_column width=”1/2″]

[vc_column_text css=””]BAR is a metric unit and is most commonly used in weather forecasting to measure atmospheric pressure. I BAR is equal to 14.50 pounds per square inch and is another method used to determine air pressure in tyres, particularly in countries that use the metric system.  It is considered a less reliable and less scientific means of measuring pressure than kPa.

The bar and millibar were introduced by the Norwegian meteorologist Vilhelm Bjerknes who founded the modern practice of weather forecasting. The term “bar” comes from the Greek word “baros,” which means weight.[/vc_column_text][/vc_column][/vc_row][vc_row full_width=”stretch_row” css=”.vc_custom_1596124948550{background-color: #f1f1f1 !important;}”][vc_column width=”1/2″]

[vc_column_text]The kPa is a metric unit equal to 1000 Pascals, which take their name from a French scientist called Blaise Pascal, who worked to measure the strength needed in hydraulic systems. As pascals are a relatively small unit, mostly used to measure low pressure environments, tyre pressures are more commonly measured in kPa (kilopascals)

The pascal (Pa) or kilopascal ( kPa ) as a unit of pressure measurement is widely used throughout the world, particularly in countries which follow the metric system. (most of Europe) and in some industries is largely replacing the pounds per square inch (psi) unit.  1 kPa is equal to 0.145038 PSI.[/vc_column_text][/vc_column][vc_column width=”1/2″]

[vc_column_text]Either kPa, PSI or Bar can be used to measure tyre pressure, and this often depends on where in the world the tyres are manufactured and whether that part of the world uses the metric and imperial system.  This can prove tricky for vehicle owners, and even professional, so if you need to make a conversion, here are the formulae you will need:

Converting from BAR to PSI

For an approximate result, multiply the pressure value by 14.504

Converting from PSI to kPa

For an approximate result, divide the pressure value by 6.895[/vc_column_text][/vc_column][/vc_row][vc_row css=”.vc_custom_1599832094437{padding-top: 40px !important;padding-bottom: 40px !important;}”][vc_column]

[vc_column_text css=””]Use the TyreSafe tyre pressure chart below to check and convert your vehicle tyre pressure measurements quickly and easily.

Alternatively, if you want to work out pressures for your specific vehicle, visit one of the following pages:

• Car Tyre Pressure
• Caravan Tyre Pressure
• Motorhome Tyre Pressure

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PSI	BAR	KPA
1	0.068	6.8
2	0.13	13
3	0.2	20
4	0.27	27
5	0.34	34
6	0.41	41
7	0.48	48
8	0.55	55
9	0.62	62
10	0.68	68
11	0.75	75
12	0.82	82
13	0.89	89
14	0.96	96
15	1.03	103
16	1.1	110
17	1.17	117
18	1.24	124
19	1.31	131
20	1.37	137

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PSI	BAR	KPA
21	1.44	144
22	1.51	151
23	1.58	158
24	1.65	165
25	1.72	172
26	1.79	179
27	1.86	186
28	1.93	193
29	1.99	199
30	2.06	206
31	2.13	213
32	2.2	220
33	2.27	227
34	2.34	234
35	2.41	241
36	2.48	248
37	2.55	255
38	2.62	262
39	2.68	268
40	2.75	275

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PSI	BAR	KPA
41	2.82	282
42	2.89	289
43	2.96	296
44	3.03	303
45	3.1	310
46	3.17	317
47	3.24	324
48	3.3	330
49	3.37	337
50	3.44	344
51	3.51	351
52	3.58	358
53	3.65	365
54	3.72	372
55	3.79	379
56	3.86	386
57	3.93	393
58	3.99	399
59	4.06	406
60	4.13	413

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PSI	BAR	KPA
61	4.2	420
62	4.27	427
63	4.34	434
64	4.41	441
65	4.48	448
66	4.55	455
67	4.61	461
68	4.68	468
69	4.75	475
70	4.82	482
71	4.89	489
72	4.96	496
73	5.03	503
74	5.1	510
75	5.17	517
76	5.24	524
77	5.3	530
78	5.37	537
79	5.44	544
80	5.51	551

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PSI	BAR	KPA
81	5.58	558
82	5.65	565
83	5.72	572
84	5.79	579
85	5.86	586
86	5.92	592
87	5.99	599
88	6.06	606
89	6.13	613
90	6.2	620
91	6.27	627
92	6.34	634
93	6.41	641
94	6.48	648
95	6.55	655
96	6.61	661
97	6.68	668
98	6.75	675
99	6.82	682
100	6.89	689

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[vc_column_text css=””]First, you need to find the recommended pressures for the tyres. These can be found in several places:

• Your vehicle’s handbook
• Stamped into the sill of the driver’s side door
• Inside the fuel cap
• TyreSafe pressure look-up tools

The recommended pressure is set by the vehicle manufacturer and varies from model to model.

Do be aware that there are different pressures for different vehicle loads – the more passengers or luggage, the higher the pressure will need to be.

Most modern vehicles use a TPMS system to monitor the pressure of your tyres.[/vc_column_text][/vc_column][vc_column width=”1/3″]

[vc_column_text css=””]The easiest way to check your vehicle tyre pressure is to use an air compressor with a calibrated pressure gauge. These can also be found at most petrol stations.[/vc_column_text][/vc_column][/vc_row][vc_row][vc_column] [/vc_column][/vc_row]