KSI to PSI Conversion Calculator
Convert ksi to psi instantly and exactly: 1 ksi = 1,000 psi. This free ksi to psi calculator works in both directions (psi to ksi too) and also converts to MPa, kPa, and Pa. Type a value, pick units, and see every step of the math.
- ksi to psi
- psi to ksi
- 1 ksi to psi
- 10 ksi to psi
- 50 ksi to psi
- 36 ksi to psi
- ksi to psi formula
- ksi to psi conversion chart
Live converter
Exact by definition: ksi ↔ psi uses ×1000 / ÷1000. SI units use 1 psi = 6.894757293168 kPa.
KSI to PSI conversion chart
| ksi | psi | MPa |
|---|---|---|
| 0.5 | 500 | 3.4474 |
| 1 | 1,000 | 6.8948 |
| 2 | 2,000 | 13.7895 |
| 3 | 3,000 | 20.6843 |
| 5 | 5,000 | 34.4738 |
| 7.5 | 7,500 | 51.7107 |
| 10 | 10,000 | 68.9476 |
| 15 | 15,000 | 103.4214 |
| 20 | 20,000 | 137.8951 |
| 25 | 25,000 | 172.3689 |
| 30 | 30,000 | 206.8427 |
| 36 | 36,000 | 248.2113 |
| 40 | 40,000 | 275.7903 |
| 50 | 50,000 | 344.7379 |
| 60 | 60,000 | 413.6854 |
| 75 | 75,000 | 517.1068 |
| 100 | 100,000 | 689.4757 |
| 150 | 150,000 | 1,034.2136 |
| 200 | 200,000 | 1,378.9515 |
19 rows. psi = ksi × 1000 exactly. MPa = ksi × 6.894757293168, shown to 4 decimals.
ksi in the real world: material strengths
Engineers quote material strength in ksi because the psi numbers get unwieldy. Common reference values:
| Material / use | ksi | psi |
|---|---|---|
| A36 structural steel (yield) | 36 | 36,000 |
| Aluminum 6061-T6 (ultimate) | 42 | 42,000 |
| Grade 8 bolt (proof load) | 120 | 120,000 |
| Concrete (compressive, typical) | 4 | 4,000 |
| Quenched 4140 steel (ultimate) | 95 | 95,000 |
Nominal published values; actual certified strengths vary by heat, temper and test standard.
Which converter do you need?
This tool: ksi ↔ psi (plus MPa, kPa, Pa as extra output units).
- ksi to MPa converter — when both your input and output live in metric stress units.
- kgf/cm² to psi converter — a different unit family (kilogram-force per square centimeter), not kilopounds.
- kPa to psi converter — when your input is already in kilopascals.
Worked examples
Example 1: 10 ksi to psi
The kilo prefix means one thousand, so every ksi is worth a thousand psi.
Example 2: 50 ksi to psi
Typical of high-strength structural steel grades.
Example 3: 36 ksi to psi (A36 steel)
The famous 36 ksi yield strength of A36 steel: 36,000 psi, or 248.211262554048 MPa via 36 × 6.894757293168.
Example 4: 1450.3773773 psi to ksi
Reverse direction: divide by 1000. (1450.3773773 psi is 10 MPa, so 10 MPa ≈ 1.4503773773 ksi.)
Frequently asked questions
What is the formula to convert ksi to psi?
Multiply the ksi value by 1000. Formula: psi = ksi × 1000. Example: 10 ksi × 1000 = 10,000 psi.
How many psi is 1 ksi?
1 ksi equals exactly 1,000 psi. The 'k' in ksi stands for kilo, meaning one thousand pounds per square inch.
How do I convert psi to ksi?
Divide the psi value by 1000. Formula: ksi = psi ÷ 1000. Example: 36,000 psi ÷ 1000 = 36 ksi.
What does ksi stand for?
ksi stands for kilopound per square inch: 1,000 pounds-force applied over one square inch. It is also written as kpsi.
What is 36 ksi in psi?
36 ksi equals 36,000 psi. This is the yield strength of A36 structural steel, which is why 36 ksi is one of the most searched ksi values in engineering.
What is 10 ksi in psi?
10 ksi equals 10,000 psi.
What is 50 ksi in psi?
50 ksi equals 50,000 psi.
How many ksi is 1,000 psi?
1,000 psi equals exactly 1 ksi.
What is 1 ksi in MPa?
1 ksi equals 6.894757293168 MPa. Our converter includes MPa, kPa, and Pa alongside ksi and psi.
Why do engineers use ksi instead of psi?
Material strengths are typically tens of thousands of psi, so ksi keeps the numbers short: 36 ksi is easier to read and say than 36,000 psi. The conversion is exact, so nothing is lost.
Is ksi the same as kpsi?
Yes. ksi and kpsi both mean kilopound per square inch and both equal 1,000 psi.
What is the difference between ksi and psi?
They measure the same thing (pressure or stress); only the scale differs. 1 ksi = 1,000 psi, exactly.
How accurate is this ksi to psi converter?
The ksi to psi path is exact by definition (multiply or divide by 1000). Conversions to MPa, kPa, and Pa use the exact definition 1 psi = 6.894757293168 kPa, and you can set 0 to 10 decimal places.
Where is ksi commonly used?
In structural and mechanical engineering: steel yield strengths (36 ksi A36), bolt proof loads (120 ksi Grade 8), aluminum ratings (42 ksi 6061-T6), and pressure vessel design.
Which related converters should I use instead?
Use our ksi to MPa converter for metric stress values, our kgf/cm2 to psi converter for metric gauge units, and our kPa to psi converter when your input is in kilopascals.
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