Kilopounds Per Square Inch to Kilopascals (ksi to kPa)
1 kilopound per square inch equals 6,894.757293 kilopascals (rounded).
How to convert kilopounds per square inch to kilopascals
To convert kilopounds per square inch to kilopascals, multiply the number of kilopounds per square inch by 6,894.757293. The factor is rounded to 10 significant digits. To go the other way, multiply kilopascals by 0.0001450377377 (rounded).
kilopascals = kilopounds per square inch × 6,894.757293
Example: 10 kilopounds per square inch = 68,947.57293 kilopascals.
About these units
Kilopound Per Square Inch (ksi)
1,000 psi (about 6.895 MPa). Used for the strength of materials such as steel in US engineering.
Thousands of pounds per square inch get unwieldy to write, so American engineers shortened them to ksi, the kilopound per square inch. Wikipedia notes it is used mostly in materials science, where tensile strength runs to large numbers of psi. One ksi is 1,000 psi, or about 6.895 MPa; NIST gives 6.894757 MPa.
Steel specifications, reinforced concrete and structural design are the typical uses. A concrete compressive strength of 4 ksi corresponds to about 27.6 MPa, and a bolt rated at 60 ksi would be roughly 414 MPa. The related unit Mpsi, a million psi, is used for elastic moduli of metals, so steel at 200 GPa is about 29 Mpsi. Metric countries write all of this in megapascals, which is why engineers working across borders keep the factor 6.895 close at hand.
1 kilopound per square inch = 6,894,757.293 pascals (approximately).
Sources: Wikipedia: Pounds per square inch; NIST SP 811, Appendix B.8; Wikipedia: Pascal (unit)
Kilopascal (kPa)
1,000 pascals. Used for tire pressures, weather reports in many countries and engineering.
Kilopascal is the form of the pascal that most people actually use. The pascal itself is very small, so outside meteorology the kilopascal became the common choice in most fields, and it equals one centibar. Medical elastography reports tissue stiffness in kPa, and Canada reports atmospheric pressure in kPa rather than hectopascals.
A standard atmosphere is 101.325 kPa. In 1982 IUPAC recommended a different reference for chemistry, a standard pressure of exactly 100 kPa, which split the older convention of 1 atm into two competing standards.
Blood pressure shows how the units line up. One mmHg is 0.13332 kPa, and a normal reading is below about 16.0 kPa systolic and 10.7 kPa diastolic, the same thing as the familiar 120 over 80 in millimeters of mercury.
1 kilopascal = 1,000 pascals (exactly).
Sources: Wikipedia: Pascal (unit); Wikipedia: Standard atmosphere (unit); Wikipedia: Millimetre of mercury
Related conversions
- Kilopascals to kilopounds per square inch (reverse)
- Kilopounds per square inch to pascals
- Kilopounds per square inch to bars
- Kilopounds per square inch to standard atmospheres
- Kilopounds per square inch to PSI
- Pascals to kilopascals
- Bars to kilopascals
- Standard atmospheres to kilopascals
- PSI to kilopascals
- Hectopascals to kilopascals
- Megapascals to kilopascals
- Millibars to kilopascals
- Torr to kilopascals
- Millimeters of mercury to kilopascals
- Inches of mercury to kilopascals
- Gigapascals to kilopascals
- Millimeters of water to kilopascals
See all pressure units.