To convert kilopascals to kilopounds per square inch, multiply by 0.0001450377377. That factor is the whole relationship: both units measure pressure, so the conversion is a proportion with no offset and no substance-specific constant.
The standard tyre-pressure unit in metric countries. One thousand psi; the unit US steel and alloy strengths are quoted in.
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. Two tables follow: rounded steps for quick lookup, and a set of real reference quantities converted into kilopounds per square inch, which is usually more useful than the bare number.
The formula
kilopascals- The amount you are converting, in kilopascals
0.00014503773773- The exact number of kilopounds per square inch in one kilopascal
kilopounds per square inch- The converted result
How it works, step by step
- Enter the value in kilopascals.
- It is multiplied by 0.00014503773773, the exact factor between the two units.
- The answer is shown in kilopounds per square inch, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A bicycle tyre: 621 kPa in kilopounds per square inch
At 621 kPa (a bicycle tyre), the same quantity in kilopounds per square inch is 621 × 0.000145038 = 0.0900684 ksi. One kilopascal is 0.000145038 kilopounds per square inch, so the numbers shrink as expected.
Sea-level air: 101 kPa in kilopounds per square inch
Take sea-level air, roughly 101 kPa. The conversion is a single multiplication — 101 × 0.000145038 — giving 0.0146488 ksi. Because the relationship is proportional, doubling the input doubles the answer to 0.0292976 ksi.
How to read your score
Frequently asked questions
How many kilopounds per square inch are in one kilopascal?
Exactly 0.00014503773773. 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 kilopascals to kilopounds per square inch?
kilopounds per square inch = kilopascals × 0.00014503773773. Reversed, kilopascals = kilopounds per square inch ÷ 0.00014503773773, which is the same as multiplying by 6894.75729317.
Which is the bigger unit, the kilopascal or the kilopound per square inch?
The kilopound per square inch. One kilopascal is only 0.000145038 of a kilopound per square inch, so it takes 6894.76 kilopascals to make one kilopound per square inch.
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 kilopascal?
The standard tyre-pressure unit in metric countries.
What is a kilopound per square inch?
One thousand psi; the unit US steel and alloy strengths are quoted in.
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 kPa to ksi in my head?
Plenty of people do this in their head: divide by 7000 instead of using the exact factor 0.0001450377377. At 100 that shortcut gives 0.014285714 kilopounds per square inch, off by 0.0002181 kilopounds per square inch or about 1.50%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Kilopascals to kilopounds per square inch reference tables
| Kilopascals | Kilopounds Per Square Inch |
|---|---|
| 0.5 kPa | 7.25189e-05 ksi |
| 1 kPa | 0.000145038 ksi |
| 2 kPa | 0.000290075 ksi |
| 3 kPa | 0.000435113 ksi |
| 5 kPa | 0.000725189 ksi |
| 10 kPa | 0.00145038 ksi |
| 20 kPa | 0.00290075 ksi |
| 25 kPa | 0.00362594 ksi |
| 50 kPa | 0.00725189 ksi |
| 75 kPa | 0.0108778 ksi |
| 100 kPa | 0.0145038 ksi |
| 250 kPa | 0.0362594 ksi |
| 500 kPa | 0.0725189 ksi |
| 1000 kPa | 0.145038 ksi |
| 5000 kPa | 0.725189 ksi |
Exact factor: 1 kilopascal = 0.00014503773773 kilopounds per square inch.
| Quantity | kPa | ksi |
|---|---|---|
| Sea-level air | 101.3 kPa | 0.0147 ksi |
| A car tyre | 220.6 kPa | 0.032 ksi |
| Blood pressure, systolic | 16 kPa | 0.00232 ksi |
| A bicycle tyre | 620.5 kPa | 0.09 ksi |
| A domestic water main | 400 kPa | 0.05802 ksi |
| A steam boiler | 1000 kPa | 0.145 ksi |
Published reference values, converted with the same factor this page uses.