Convert pound per square inchs to kilopound per square inchs

1 psi = 0.001 ksi — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.

From

0.001ksi

✓ Exact 1 psi = 0.001 ksi

As a fraction: 1/1000

Significant digits 12 Notation 1 psi = 0.001 ksi

How to convert pound per square inchs to kilopound per square inchs

Multiply the number of pound per square inchs by 0.001 to get kilopound per square inchs.

The exact factor is 0.001 — as a fraction, 1/1000.

Pound per square inch: Exactly 6894.757 293 168 361 Pa — an exact fraction, because both the pound and the inch are defined exactly.

Kilopound per square inch: Material strengths in US practice.

Pound per square inchs (psi)	Kilopound per square inchs (ksi)
1 psi	0.001
2 psi	0.002
3 psi	0.003
5 psi	0.005
10 psi	0.01
20 psi	0.02
25 psi	0.025
50 psi	0.05
100 psi	0.1
250 psi	0.25
500 psi	0.5
1000 psi	1

Kilopound per square inchs (ksi)	Pound per square inchs (psi)
1 ksi	1000
2 ksi	2000
3 ksi	3000
5 ksi	5000
10 ksi	10 000
20 ksi	20 000
25 ksi	25 000
50 ksi	50 000
100 ksi	100 000
250 ksi	250 000
500 ksi	500 000
1000 ksi	1 000 000

One pound per square inch equals 0.001 kilopound per square inchs (psi → ksi). That figure is exact, not rounded.

Multiply the number of pound per square inchs by 0.001 to get kilopound per square inchs.

One kilopound per square inch is 1000 pound per square inchs.

10 psi = 0.01 ksi.

Exactly 6894.757 293 168 361 Pa — an exact fraction, because both the pound and the inch are defined exactly.

Material strengths in US practice.