To convert kilopounds per square inch to inches of mercury, multiply by 2036.020461. That factor is the whole relationship: both units measure pressure, so the conversion is a proportion with no offset and no substance-specific constant.
One thousand psi; the unit US steel and alloy strengths are quoted in. US aviation and weather altimeter setting unit.
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 inches of mercury, 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
2036.02046108- The exact number of inches of mercury in one kilopound per square inch
inches of mercury- The converted result
How it works, step by step
- Enter the value in kilopounds per square inch.
- It is multiplied by 2036.02046108, the exact factor between the two units.
- The answer is shown in inches of mercury, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A bicycle tyre: 0.09 ksi in inches of mercury
Take a bicycle tyre, roughly 0.09 ksi. The conversion is a single multiplication — 0.09 × 2036.02 — giving 183.242 inHg. Because the relationship is proportional, doubling the input doubles the answer to 366.484 inHg.
A domestic water main: 0.058 ksi in inches of mercury
A domestic water main comes to about 0.058 ksi. Multiplying by the factor: 0.058 × 2036.02 = 118.089 inHg. Dividing the answer back by 2036.02 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
How to read your score
Frequently asked questions
How many inches of mercury are in one kilopound per square inch?
Exactly 2036.02046108. 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 inches of mercury?
inches of mercury = kilopounds per square inch × 2036.02046108. Reversed, kilopounds per square inch = inches of mercury ÷ 2036.02046108, which is the same as multiplying by 0.000491154199634.
Which is the bigger unit, the kilopound per square inch or the inch of mercury?
The kilopound per square inch. One kilopound per square inch equals 2036.02 inches of mercury.
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 inch of mercury?
US aviation and weather altimeter setting unit.
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 inHg in my head?
Plenty of people do this in their head: multiply by 2000 instead of using the exact factor 2036.020461. At 100 that shortcut gives 200,000 inches of mercury, off by 3602 inches of mercury or about 1.77%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Kilopounds Per Square Inch to inches of mercury reference tables
| Kilopounds Per Square Inch | Inches Of Mercury |
|---|---|
| 0.5 ksi | 1018.01 inHg |
| 1 ksi | 2036.02 inHg |
| 2 ksi | 4072.04 inHg |
| 3 ksi | 6108.06 inHg |
| 5 ksi | 10,180.1 inHg |
| 10 ksi | 20,360.2 inHg |
| 20 ksi | 40,720.4 inHg |
| 25 ksi | 50,900.5 inHg |
| 50 ksi | 101,801 inHg |
| 75 ksi | 152,702 inHg |
| 100 ksi | 203,602 inHg |
| 250 ksi | 509,005 inHg |
| 500 ksi | 1.01801e+06 inHg |
| 1000 ksi | 2.03602e+06 inHg |
| 5000 ksi | 1.01801e+07 inHg |
Exact factor: 1 kilopound per square inch = 2036.02046108 inches of mercury.
| Quantity | ksi | inHg |
|---|---|---|
| Sea-level air | 0.0147 ksi | 29.92 inHg |
| A car tyre | 0.032 ksi | 65.15 inHg |
| Blood pressure, systolic | 0.00232 ksi | 4.724 inHg |
| A bicycle tyre | 0.09 ksi | 183.2 inHg |
| A domestic water main | 0.05802 ksi | 118.1 inHg |
| A steam boiler | 0.145 ksi | 295.3 inHg |
Published reference values, converted with the same factor this page uses.