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Pressure

psitoksi

Convert pounds-force per square inch (psi) to kilopounds-force per square inch (ksi).

Factor1 psi = 0.001 ksi

Converter

psi

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1ksi

Rendered to 6 significant figures.

Formula

Formula
ksi = psi × 0.001

Multiply any value in pounds-force per square inch by 0.001 to obtain the value in kilopounds-force per square inch.

Worked example

Convert 1000 psi to ksi.

  1. 01Start with 1000 psi.
  2. 02Multiply by the conversion factor: 1000 × 0.001 = 1 ksi.
Result1000 psi = 1 ksi

Conversion table

psiksi
10.001
20.002
50.005
100.01
200.02
500.05
1000.1
2000.2
5000.5
10001

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from psi to ksi?
1 psi equals 0.001 ksi. To convert, multiply the value in pounds-force per square inch by 0.001.
How do I convert 1 psi to ksi?
1 psi = 0.001 ksi. For any value, multiply by 0.001.
How do I convert ksi back to psi?
Divide by the same factor — or equivalently, multiply by 1000. So 1 ksi = 1000 psi.
When would I need to convert pound-force per square inch to kilopound-force per square inch?
Pressure conversions between psi and ksi are common when working with mixed-vendor instrumentation, when piping codes use different units to process datasheets, or when converting field readings into SI for hydraulic calculations.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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