One kilopound per square inch is exactly 1000 pounds per square inch, so converting kilopounds per square inch to pounds per square inch is a single multiplication. Enter any figure and the result appears as you type — the arithmetic runs in your browser, so nothing is sent anywhere.
One thousand psi; the unit US steel and alloy strengths are quoted in. The dominant US pressure unit for tyres, plumbing and compressors.
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 pounds per square inch, 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
1000- The exact number of pounds per square inch in one kilopound per square inch
pounds per square inch- The converted result
How it works, step by step
- Enter the value in kilopounds per square inch.
- It is multiplied by 1000, the exact factor between the two units.
- The answer is shown in pounds per square inch, 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 pounds per square inch
Take a domestic water main, roughly 0.058 ksi. The conversion is a single multiplication — 0.058 × 1000 — giving 58 psi. Because the relationship is proportional, doubling the input doubles the answer to 116 psi.
Blood pressure, systolic: 0.00232 ksi in pounds per square inch
Blood pressure, systolic comes to about 0.00232 ksi. Multiplying by the factor: 0.00232 × 1000 = 2.32 psi. Dividing the answer back by 1000 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
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Frequently asked questions
How many pounds per square inch are in one kilopound per square inch?
Exactly 1000. 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 pounds per square inch?
pounds per square inch = kilopounds per square inch × 1000. Reversed, kilopounds per square inch = pounds per square inch ÷ 1000, which is the same as multiplying by 0.001.
Which is the bigger unit, the kilopound per square inch or the pound per square inch?
The kilopound per square inch. One kilopound per square inch equals 1000 pounds 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 kilopound per square inch?
One thousand psi; the unit US steel and alloy strengths are quoted in.
What is a pound per square inch?
The dominant US pressure unit for tyres, plumbing and compressors.
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.
Kilopounds Per Square Inch to pounds per square inch reference tables
| Kilopounds Per Square Inch | Pounds Per Square Inch |
|---|---|
| 0.5 ksi | 500 psi |
| 1 ksi | 1000 psi |
| 2 ksi | 2000 psi |
| 3 ksi | 3000 psi |
| 5 ksi | 5000 psi |
| 10 ksi | 10,000 psi |
| 20 ksi | 20,000 psi |
| 25 ksi | 25,000 psi |
| 50 ksi | 50,000 psi |
| 75 ksi | 75,000 psi |
| 100 ksi | 100,000 psi |
| 250 ksi | 250,000 psi |
| 500 ksi | 500,000 psi |
| 1000 ksi | 1e+06 psi |
| 5000 ksi | 5e+06 psi |
Exact factor: 1 kilopound per square inch = 1000 pounds per square inch.
| Quantity | ksi | psi |
|---|---|---|
| Sea-level air | 0.0147 ksi | 14.7 psi |
| A car tyre | 0.032 ksi | 32 psi |
| Blood pressure, systolic | 0.00232 ksi | 2.32 psi |
| A bicycle tyre | 0.09 ksi | 90 psi |
| A domestic water main | 0.05802 ksi | 58.02 psi |
| A steam boiler | 0.145 ksi | 145 psi |
Published reference values, converted with the same factor this page uses.