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Ksi to Psi Converter

Enter the value that you want to convert ksi to psi or psi to ksi.

1 ksi = 1000.0000000 psi

Formula: psi = ksi value × 1000.0000000

ksi to psi

ksi
10000.00000psi

10 ksi = 10000.00000 psi

Popular Pressure Converters:

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Converting Ksi to Psi

The Ksi in Engineering

Ksi (ksi) is a unit of pressure measurement. 1 ksi is equal to 1000.0000000 psi.

What is Psi?

Psi (psi) is a unit of pressure measurement. 1 psi is equal to 0.0010000 ksi.

Pressure Units Across Industries

Pressure measurements vary dramatically by industry. Meteorologists report in millibars or hectopascals, tire shops use PSI, scuba divers think in atmospheres or bar, vacuum engineers work in torr, and hydraulic systems specify in megapascals. A single industrial plant might encounter all these units across different equipment manuals, safety datasheets, and regulatory standards from different countries.

ksi to psi metric conversion table

0.01 ksi=10.00000 psi
0.1 ksi=100.00000 psi
1 ksi=1000.00000 psi
2 ksi=2000.00000 psi
3 ksi=3000.00000 psi
4 ksi=4000.00000 psi
5 ksi=5000.00000 psi
6 ksi=6000.00000 psi
7 ksi=7000.00000 psi
8 ksi=8000.00000 psi
9 ksi=9000.00000 psi
10 ksi=10000.00000 psi
11 ksi=11000.00000 psi
12 ksi=12000.00000 psi
13 ksi=13000.00000 psi
14 ksi=14000.00000 psi
15 ksi=15000.00000 psi
16 ksi=16000.00000 psi
17 ksi=17000.00000 psi
18 ksi=18000.00000 psi
19 ksi=19000.00000 psi
20 ksi=20000.00000 psi
30 ksi=30000.00000 psi
40 ksi=40000.00000 psi
50 ksi=50000.00000 psi
60 ksi=60000.00000 psi
70 ksi=70000.00000 psi
80 ksi=80000.00000 psi
90 ksi=90000.00000 psi
100 ksi=100000.00000 psi
200 ksi=200000.00000 psi
300 ksi=300000.00000 psi
400 ksi=400000.00000 psi
500 ksi=500000.00000 psi
600 ksi=600000.00000 psi
700 ksi=700000.00000 psi
800 ksi=800000.00000 psi
900 ksi=900000.00000 psi
1000 ksi=1000000.00000 psi

How to Convert Ksi to Psi?

We can convert ksi to psi by using an example.

Example:

Convert 20 Ksi to Psi?

We know 1 Ksi = 1000.0000000 psi; 1 Psi = 0.0010000 ksi.

20 ksi = ___psi

20 × 1000.0000000 = 20000.00000 psi (we know 1 ksi = 1000.0000000 psi)

Answer:

20 ksi = 20000.00000 psi

How to Convert ksi to PSI (Step-by-Step)

Converting ksi (kilopounds per square inch) to PSI (pounds per square inch) is the simplest pressure conversion in US engineering — just multiply by 1000. The "k" prefix means "kilo" (thousand).

  1. Write down the value in ksi.
  2. Multiply by 1000.
  3. The result is the equivalent value in PSI.
  4. Verify: your PSI value should have exactly three more digits than the ksi value.
💡 Tip: This is pure prefix math — move the decimal three places right. A 36 ksi steel has 36,000 PSI yield strength. No conversion factor needed, just ×1000.

Common ksi to PSI Conversions

Standard US structural and mechanical engineering stress values in both scales.

KsiPsi
36 ksi36,000 PSI
50 ksi50,000 PSI
58 ksi58,000 PSI
60 ksi60,000 PSI
92 ksi92,000 PSI
120 ksi120,000 PSI
150 ksi150,000 PSI
270 ksi270,000 PSI

Solved Examples: ksi to PSI

Question 1: A structural engineer specifies W14×90 columns with Fy = 50 ksi. What yield strength in PSI should the mill certificate show?

Solution:

Yield strength in PSI = 50 ksi × 1000

= 50,000 PSI

Answer: 50 ksi = 50,000 PSI — the mill cert must show at least this value.

Question 2: A bolt specification requires 105 ksi minimum tensile strength. Express in PSI.

Solution:

Tensile strength in PSI = 105 × 1000

= 105,000 PSI

Answer: 105 ksi = 105,000 PSI — typical for SAE Grade 5 bolts.

Question 3: A fatigue analysis shows an endurance limit of 28 ksi for a steel component. What is this in PSI?

Solution:

Endurance limit in PSI = 28 × 1000

= 28,000 PSI

Answer: 28 ksi = 28,000 PSI — the component can withstand unlimited cycles below this stress.

Question 4: An engineer reads a pressure test report showing 3.5 ksi. Convert to PSI.

Solution:

Pressure in PSI = 3.5 × 1000

= 3,500 PSI

Answer: 3.5 ksi = 3,500 PSI — a high-pressure hydraulic test.

Practice Questions: ksi to PSI

Try solving these on your own to test your understanding:

  1. Convert 75 ksi to PSI. (Answer: 75,000 PSI)
  2. A steel wire has 200 ksi tensile strength. Express in PSI. (Answer: 200,000 PSI)
  3. Convert 0.5 ksi to PSI. (Answer: 500 PSI)
  4. A weld metal has 70 ksi tensile. What is this in PSI? (Answer: 70,000 PSI)
  5. Convert 44 ksi yield strength to PSI. (Answer: 44,000 PSI)

When Engineers Use ksi vs PSI

In US engineering practice, ksi is used for material properties and structural stresses (where values range from 10-300 ksi), while PSI is used for fluid pressures and lower-magnitude stresses. This convention avoids unwieldy numbers: writing "50 ksi yield" is cleaner than "50,000 PSI yield" on drawings. However, many calculation spreadsheets require PSI for consistency with force (lbs) and area (in²) inputs. The ×1000 conversion happens frequently in daily structural engineering work.

ASTM Steel Grade Numbering and ksi

Many ASTM steel grade numbers directly correspond to their yield strength in ksi: A572 Grade 50 = 50 ksi yield; A572 Grade 60 = 60 ksi yield; A572 Grade 65 = 65 ksi yield. Similarly, rebar grades: Grade 40 = 40 ksi (40,000 PSI), Grade 60 = 60 ksi (60,000 PSI), Grade 75 = 75 ksi (75,000 PSI). This naming convention makes it trivial to know the PSI value — just add three zeros to the grade number.

Key Takeaways

  • Multiply ksi by 1000 to get PSI (exact prefix conversion).
  • Move the decimal three places right: 50 ksi = 50,000 PSI.
  • Ksi is used for material strengths; PSI for fluid pressures.
  • ASTM grade numbers often equal the yield strength in ksi.
  • No approximation — this is a pure "kilo" prefix (×1000).
  • Steel specifications typically range from 36-270 ksi (36,000-270,000 PSI).

Ksi to Psi Conversion Formula

psi = ksi × 1000.0000000

1 ksi = 1000.0000000 psi

1 psi = 0.0010000 ksi

Reverse: ksi = psi × 0.0010000

Frequently Asked Questions

How many psi are in 1 ksi?

There are 1000.0000000 psi in 1 ksi. To convert ksi to psi, multiply the value by 1000.0000000.

How do I convert ksi to psi?

Multiply your ksi value by 1000.0000000 to get the equivalent in psi. For example, 5 ksi = 5 × 1000.0000000 = 5000.00000 psi.

How do I convert psi to ksi?

Multiply your psi value by 0.0010000 to get the equivalent in ksi. Alternatively, divide by 1000.0000000.

What is 10 ksi in psi?

10 ksi is equal to 10000.00000 psi.

What is 100 ksi in psi?

100 ksi is equal to 100000.00000 psi.