This page converts kilopounds per square inch into bar using the factor 68.94757293, and shows the reverse figure alongside it. Both units measure pressure, which is why one number does the whole job.
One thousand psi; the unit US steel and alloy strengths are quoted in. Almost exactly atmospheric pressure; standard in European industry and diving.
Gauge versus absolute. A tyre gauge reading 32 psi means 32 psi above atmospheric, which is about 46.7 psi absolute. Converting the number is straightforward; remembering which zero it was measured from is where the mistakes happen. N/mm² and MPa are the same size, so a drawing quoting either is quoting the same stress. The tables underneath give both a plain step-by-step lookup and a list of real quantities expressed in bar, so you can sanity-check whether your answer is a plausible size.
The formula
kilopounds per square inch- The amount you are converting, in kilopounds per square inch
68.9475729317- The exact number of bar in one kilopound per square inch
bar- The converted result
How it works, step by step
- Enter the value in kilopounds per square inch.
- It is multiplied by 68.9475729317, the exact factor between the two units.
- The answer is shown in bar, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A domestic water main: 0.058 ksi in bar
Take a domestic water main, roughly 0.058 ksi. The conversion is a single multiplication — 0.058 × 68.9476 — giving 3.99896 bar. Because the relationship is proportional, doubling the input doubles the answer to 7.99792 bar.
A steam boiler: 0.145 ksi in bar
At 0.145 ksi (a steam boiler), the same quantity in bar is 0.145 × 68.9476 = 9.9974 bar. One kilopound per square inch is 68.9476 bar, so the numbers grow as expected.
How to read your score
Frequently asked questions
How many bar are in one kilopound per square inch?
Exactly 68.9475729317. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert kilopounds per square inch to bar?
bar = kilopounds per square inch × 68.9475729317. Reversed, kilopounds per square inch = bar ÷ 68.9475729317, which is the same as multiplying by 0.014503773773.
Which is the bigger unit, the kilopound per square inch or the bar?
The kilopound per square inch. One kilopound per square inch equals 68.9476 bar.
What does this quantity actually measure?
Both units measure pressure. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a kilopound per square inch?
One thousand psi; the unit US steel and alloy strengths are quoted in.
What is a bar?
Almost exactly atmospheric pressure; standard in European industry and diving.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Is there a quick way to do ksi to bar in my head?
Plenty of people do this in their head: multiply by 70 instead of using the exact factor 68.94757293. At 100 that shortcut gives 7000 bar, off by 105.2 bar or about 1.53%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Kilopounds Per Square Inch to bar reference tables
| Kilopounds Per Square Inch | Bar |
|---|---|
| 0.5 ksi | 34.4738 bar |
| 1 ksi | 68.9476 bar |
| 2 ksi | 137.895 bar |
| 3 ksi | 206.843 bar |
| 5 ksi | 344.738 bar |
| 10 ksi | 689.476 bar |
| 20 ksi | 1378.95 bar |
| 25 ksi | 1723.69 bar |
| 50 ksi | 3447.38 bar |
| 75 ksi | 5171.07 bar |
| 100 ksi | 6894.76 bar |
| 250 ksi | 17,236.9 bar |
| 500 ksi | 34,473.8 bar |
| 1000 ksi | 68,947.6 bar |
| 5000 ksi | 344,738 bar |
Exact factor: 1 kilopound per square inch = 68.9475729317 bar.
| Quantity | ksi | bar |
|---|---|---|
| Sea-level air | 0.0147 ksi | 1.013 bar |
| A car tyre | 0.032 ksi | 2.206 bar |
| Blood pressure, systolic | 0.00232 ksi | 0.16 bar |
| A bicycle tyre | 0.09 ksi | 6.205 bar |
| A domestic water main | 0.05802 ksi | 4 bar |
| A steam boiler | 0.145 ksi | 10 bar |
Published reference values, converted with the same factor this page uses.