Bar to PSI Conversion – Full Guide, Chart & MPa/kPa Calculator

Use the tool below to convert between Bar, PSI, MPa, and kPa. Enter your value, choose a unit, and the calculator will show the results instantly.

Convert Bar to PSI

Convert PSI to Bar

What Are Bar and PSI?

Bar is a metric unit of pressure, defined as 100,000 Pascals.

PSI (pounds per square inch) is an imperial unit used mainly in the US and UK. Both are used to measure gas and fluid pressure.

Conversion Formulas

1 Bar = 14.5038 PSI
1 PSI = 0.0689476 Bar
1 Bar = 0.1 MPa = 100 kPa
1 MPa = 10 Bar = 145.038 PSI

Quick Reference Chart

See the full chart above for detailed values. Example entries:

Bar	PSI	MPa	kPa
1.0	14.50	0.10	100
1.5	21.76	0.15	150
2.0	29.01	0.20	200
2.5	36.26	0.25	250
3.0	43.51	0.30	300
3.5	50.76	0.35	350
4.0	58.02	0.40	400
4.5	65.27	0.45	450
5.0	72.52	0.50	500
5.5	79.77	0.55	550
6.0	87.02	0.60	600
6.5	94.28	0.65	650
7.0	101.53	0.70	700
7.5	108.78	0.75	750
8.0	116.03	0.80	800
8.5	123.28	0.85	850
9.0	130.54	0.90	900
9.5	137.79	0.95	950
10.0	145.04	1.00	1000
10.5	152.29	1.05	1050
11.0	159.55	1.10	1100
11.5	166.80	1.15	1150
12.0	174.05	1.20	1200
12.5	181.30	1.25	1250
13.0	188.55	1.30	1300
13.5	195.81	1.35	1350
14.0	203.06	1.40	1400
14.5	210.31	1.45	1450
15.0	217.56	1.50	1500
15.5	224.82	1.55	1550
16.0	232.07	1.60	1600
16.5	239.32	1.65	1650
17.0	246.57	1.70	1700
17.5	253.83	1.75	1750
18.0	261.08	1.80	1800
18.5	268.33	1.85	1850
19.0	275.58	1.90	1900
19.5	282.83	1.95	1950
20.0	290.09	2.00	2000

Common Higher Pressure Levels

Bar	PSI	MPa	kPa
21	304.54	2.10	2100
25	362.63	2.50	2500
30	435.14	3.00	3000
35	507.65	3.50	3500
40	580.16	4.00	4000
45	652.66	4.50	4500
50	725.19	5.00	5000
55	797.69	5.50	5500
60	870.20	6.00	6000
65	942.71	6.50	6500
70	1015.22	7.00	7000
75	1087.73	7.50	7500
80	1160.24	8.00	8000
85	1232.75	8.50	8500
90	1305.26	9.00	9000
95	1377.77	9.50	9500
100	1450.28	10.00	10000

When to Use Bar, PSI, MPa or kPa?

Application	Preferred Unit
Tire pressure	PSI or Bar
Air compressors	Bar or PSI
Industrial systems	MPa or kPa
engineering	MPa

How to Choose the Right Pressure Air Compressor

When selecting an air compressor, pressure is one of the most critical parameters. However, higher pressure does not always mean better. Choosing the right pressure means finding the lowest possible pressure that still meets your equipment needs — this helps you save energy and reduce operating costs.

Know Your Equipment’s Pressure Need Refer to your pneumatic tools, production equipment, or supplier data sheet (e.g., needs 6 bar).

Estimate System Losses Include pipeline loss, filters, dryers, and fittings — typically 0.5–1 bar.

Add 10–15% Safety Margin To compensate for pressure drops or load surges during peak usage.

Select Compressor Accordingly 예시:
1. Tool pressure demand: 6 bar
2. System loss: 1 bar
3. 👉 Select a 7–8 bar compressor
4. ❌ Avoid choosing 10+ bar without clear reason

Frequently Asked Questions

Can I just use 14.5 instead of 14.5038?

For general reference, yes. For technical work, use 14.5038.

Why use MPa instead of Bar?

MPa is used in formal engineering standards (like in China).

Do temperature or altitude affect these values?

Only if you are using absolute pressure. Gauge pressure (used here) is unaffected.

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