How many ksi are in 1 bar?

1 bar equals 0.0145037738 ksi, using the exact defined conversion factor rather than an estimate.

How do I convert bar to ksi?

Multiply the bar value by 0.01450377377. The converter above does this instantly to whatever precision you set.

How do I convert ksi back to bar?

Use the reverse factor: 1 ksi equals 68.94757293 bars. You can also use the swap control in the converter above to flip the direction instantly.

KSI (ksi) is a unit of pressure.

Is the bar to ksi conversion exact?

Yes. A bar is defined as exactly 100,000 pascals, close to (but distinct from) one standard atmosphere (101,325 Pa). That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.

Bars to KSI Converter

Q: What is a bar?

Bar (bar) measures pressure. A bar is defined as exactly 100,000 pascals, close to (but distinct from) one standard atmosphere (101,325 Pa). It is classified as a Non-SI metric unit accepted for use with SI.

About Converting Bars to KSI

Bar and KSI both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. Bar is most often used for tire pressure specifications outside the us.

Formula

ksi = bars × 0.014503773773

This factor comes from each unit's defined relationship to the category's base unit: 1 bar equals 100000 base units, and 1 ksi equals 6894757.29317 base units, so dividing one by the other gives the direct bar-to-ksi factor of 0.014503773773.

Simple example

1 bar × 0.01450377377 = 0.0145037738 ksi

1 bar = 0.0145037738 ksi.

Real-world example

35 bar × 0.01450377377 = 0.5076320821 ksi

35 bars = 0.5076320821 ksi.

Conversion table

Bar (bar)	KSI (ksi)
1 bar	0.0145037738 ksi
5 bar	0.0725188689 ksi
10 bar	0.1450377377 ksi
25 bar	0.3625943443 ksi
50 bar	0.7251886887 ksi
100 bar	1.450377377 ksi

Reverse conversion: KSI to Bar

0.0145037738 ksi × 68.94757293 = 1.000000002 bar

0.0145037738 ksi = 1.000000002 bars.

bars = ksi × 68.9475729317

For a page dedicated to this direction, see KSI to Bar.

Understanding the Bar

Bar (bar) measures pressure. A bar is defined as exactly 100,000 pascals, close to (but distinct from) one standard atmosphere (101,325 Pa). It is classified as a Non-SI metric unit accepted for use with SI.

Where it's used: Widely used in Europe and most of the world for tire pressure, weather, and industrial pressure

Uses of the Bar today

Tire pressure specifications outside the US
Meteorology (weather maps commonly use millibars, hPa)
Industrial and hydraulic pressure ratings in metric-system countries

History of the Bar

The bar was proposed by Norwegian meteorologist Vilhelm Bjerknes around 1906 as a convenient round pressure unit close to atmospheric pressure, derived from the CGS unit system (one bar equals one million dynes per square centimeter).

Though not an SI unit, the bar remains in wide practical use, particularly in meteorology (as the millibar, now more often written as the equivalent hectopascal) and in tire and hydraulic pressure specifications across most of the world.

Historical origin. Bar was not the invention of a single named person; it developed through the process described above.

Understanding the KSI (ksi)

Kips per square inch.

Bar — sources

BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the bar among accepted non-SI pressure units.

Bars to KSI Converter — bar to ksi

Pressure Converter