Ksi to Bar Converter
Enter the value that you want to convert ksi to bar or bar to ksi.
1 ksi = 68.9475729 bar
Formula: bar = ksi value × 68.9475729
ksi to bar
10 ksi = 689.47573 bar
Popular Pressure Converters:
How Ksi Relates to Bar
The Ksi in Engineering
Ksi (ksi) is a unit of pressure measurement. 1 ksi is equal to 68.9475729 bar.
The Bar in Engineering
Bar (bar) is a unit of pressure measurement. 1 bar is equal to 0.0145038 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 bar metric conversion table
| 0.01 ksi | = | 0.68948 bar |
| 0.1 ksi | = | 6.89476 bar |
| 1 ksi | = | 68.94757 bar |
| 2 ksi | = | 137.89515 bar |
| 3 ksi | = | 206.84272 bar |
| 4 ksi | = | 275.79029 bar |
| 5 ksi | = | 344.73786 bar |
| 6 ksi | = | 413.68544 bar |
| 7 ksi | = | 482.63301 bar |
| 8 ksi | = | 551.58058 bar |
| 9 ksi | = | 620.52816 bar |
| 10 ksi | = | 689.47573 bar |
| 11 ksi | = | 758.42330 bar |
| 12 ksi | = | 827.37088 bar |
| 13 ksi | = | 896.31845 bar |
| 14 ksi | = | 965.26602 bar |
| 15 ksi | = | 1034.21359 bar |
| 16 ksi | = | 1103.16117 bar |
| 17 ksi | = | 1172.10874 bar |
| 18 ksi | = | 1241.05631 bar |
| 19 ksi | = | 1310.00389 bar |
| 20 ksi | = | 1378.95146 bar |
| 30 ksi | = | 2068.42719 bar |
| 40 ksi | = | 2757.90292 bar |
| 50 ksi | = | 3447.37865 bar |
| 60 ksi | = | 4136.85438 bar |
| 70 ksi | = | 4826.33011 bar |
| 80 ksi | = | 5515.80583 bar |
| 90 ksi | = | 6205.28156 bar |
| 100 ksi | = | 6894.75729 bar |
| 200 ksi | = | 13789.51459 bar |
| 300 ksi | = | 20684.27188 bar |
| 400 ksi | = | 27579.02917 bar |
| 500 ksi | = | 34473.78647 bar |
| 600 ksi | = | 41368.54376 bar |
| 700 ksi | = | 48263.30105 bar |
| 800 ksi | = | 55158.05835 bar |
| 900 ksi | = | 62052.81564 bar |
| 1000 ksi | = | 68947.57293 bar |
How to Convert Ksi to Bar?
We can convert ksi to bar by using an example.
Example:
Convert 20 Ksi to Bar?
We know 1 Ksi = 68.9475729 bar; 1 Bar = 0.0145038 ksi.
20 ksi = ___bar
20 × 68.9475729 = 1378.95146 bar (we know 1 ksi = 68.9475729 bar)
Answer:
20 ksi = 1378.95146 bar
How to Convert ksi to Bar (Step-by-Step)
Converting ksi to bar bridges US structural engineering stress values with European industrial pressure gauges. The conversion factor is 1 ksi = 68.9476 bar.
- Write down the stress or pressure value in ksi.
- Multiply the ksi value by 68.9476.
- The result is the equivalent pressure in bar.
- For quick estimation, multiply by 69 (overshoots by only 0.08%).
Common ksi to Bar Conversions
Structural stress values converted to bar for high-pressure system comparisons.
| Ksi | Bar |
|---|---|
| 1 ksi | 68.95 bar |
| 5 ksi | 344.7 bar |
| 10 ksi | 689.5 bar |
| 36 ksi | 2482 bar |
| 50 ksi | 3447 bar |
| 100 ksi | 6895 bar |
Solved Examples: ksi to Bar
Question 1: A high-pressure waterjet cutting system operates at 6 ksi. What pressure gauge reading in bar should the operator expect?
Solution:
Pressure in bar = Pressure in ksi × 68.9476
= 6 × 68.9476
= 413.7 bar
Answer: 6 ksi = 413.7 bar — within typical waterjet intensifier range.
Question 2: A hydraulic bolt tensioning tool operates at 1.5 ksi. Express in bar.
Solution:
Pressure in bar = 1.5 × 68.9476
= 103.4 bar
Answer: 1.5 ksi = 103.4 bar — a standard hydraulic bolt tensioner pressure.
Question 3: A burst disc is rated at 8 ksi. What is the burst pressure in bar?
Solution:
Pressure in bar = 8 × 68.9476
= 551.6 bar
Answer: 8 ksi = 551.6 bar — used in high-pressure chemical reactor protection.
Practice Questions: ksi to Bar
Try solving these on your own to test your understanding:
- Convert 2 ksi to bar. (Answer: 137.9 bar)
- A test pressure is 4 ksi. Express in bar. (Answer: 275.8 bar)
- Convert 15 ksi to bar. (Answer: 1034.2 bar)
- A pressure vessel is rated at 3 ksi. What is this in bar? (Answer: 206.8 bar)
- Convert 0.5 ksi to bar. (Answer: 34.5 bar)
High-Pressure Systems Where ksi and Bar Overlap
While ksi is primarily a stress unit, it appears in pressure contexts for ultra-high-pressure systems: waterjet cutting (40-90 ksi / 2758-6205 bar), autofrettage of gun barrels (50-100 ksi / 3447-6895 bar), diamond anvil cell experiments, and high-pressure hydrogen storage vessels. In these applications, engineers may receive specifications in ksi from US sources and need bar equivalents for European-manufactured components like intensifiers, valves, and fittings.
Pressure Vessel Design: Converting Between US and Metric Codes
ASME Boiler and Pressure Vessel Code (Section VIII) uses psi and ksi for allowable stresses, while EN 13445 (European pressure vessel standard) uses bar for design pressure and MPa for material strength. When qualifying materials for European vessels using US mill test reports, the ksi-to-bar conversion helps compare test pressures. A hydrostatic test at 2 ksi (137.9 bar) in ASME terms must be verified against EN requirements stated in bar.
Waterjet Cutting Pressure Specifications
Industrial waterjet systems are commonly specified in ksi in North America: standard cutting at 40-55 ksi (2758-3792 bar), high-performance cutting at 60-87 ksi (4137-5998 bar), and hyperpressure systems at 90+ ksi (6205+ bar). European manufacturers (KMT, BFT) list these same pumps in bar. Understanding that 60 ksi ≈ 4137 bar helps when comparing competitive bids from US and European suppliers.
Key Takeaways
- Multiply ksi by 68.9476 to get bar.
- Quick estimate: ksi × 69 ≈ bar (error < 0.1%).
- 1 ksi = 68.95 bar = 6.895 MPa = 1000 PSI.
- Ksi-to-bar conversion is most relevant for ultra-high-pressure systems.
- Waterjet cutting systems commonly specify in both ksi and bar.
- Structural steel stresses (36-100 ksi) convert to 2482-6895 bar — far above gauge ranges.
Ksi to Bar Conversion Formula
bar = ksi × 68.9475729
1 ksi = 68.9475729 bar
1 bar = 0.0145038 ksi
Reverse: ksi = bar × 0.0145038
Frequently Asked Questions
How many bar are in 1 ksi?
There are 68.9475729 bar in 1 ksi. To convert ksi to bar, multiply the value by 68.9475729.
How do I convert ksi to bar?
Multiply your ksi value by 68.9475729 to get the equivalent in bar. For example, 5 ksi = 5 × 68.9475729 = 344.73786 bar.
How do I convert bar to ksi?
Multiply your bar value by 0.0145038 to get the equivalent in ksi. Alternatively, divide by 68.9475729.
What is 10 ksi in bar?
10 ksi is equal to 689.47573 bar.
What is 100 ksi in bar?
100 ksi is equal to 6894.75729 bar.