ATM Pressure Converter
Convert atmospheres (atm) to and from Pascals, kPa, bar, psi, mmHg, Torr, and inHg. Bidirectional conversion with preset values, reference table, and quick formulas.
ksi to MPa Converter
Convert between ksi (kilopounds per square inch) and MPa (megapascals) for engineering and material science applications.
ksi
Megapascals (MPa)⧉
6.89 MPa
Converted from ksi
Kilopascals (kPa)⧉
6,894.76 kPa
Converted from ksi
PSI⧉
1,000.00 psi
Converted from ksi
Bar⧉
68.95 bar
Converted from ksi
Pascals (Pa)⧉
6,894,760.00 Pa
Converted from ksi
Conversion Table
| ksi | MPa | kPa | psi | bar | Pa |
|---|---|---|---|---|---|
| 0.01 | 0.07 | 68.95 | 10.00 | 0.69 | 68,947.60 |
| 0.10 | 0.69 | 689.48 | 100.00 | 6.89 | 689,476.00 |
| 0.50 | 3.45 | 3,447.38 | 500.00 | 34.47 | 3,447,380.00 |
| 1.00 | 6.89 | 6,894.76 | 1,000.00 | 68.95 | 6,894,760.00 |
| 2.00 | 13.79 | 13,789.52 | 2,000.00 | 137.90 | 13,789,520.00 |
| 5.00 | 34.47 | 34,473.80 | 5,000.00 | 344.74 | 34,473,800.00 |
| 10.00 | 68.95 | 68,947.60 | 10,000.00 | 689.48 | 68,947,600.00 |
| 50.00 | 344.74 | 344,738.00 | 50,000.00 | 3,447.38 | 344,738,000.00 |
| 100.00 | 689.48 | 689,476.00 | 100,000.00 | 6,894.76 | 689,476,000.00 |
| 1,000.00 | 6,894.76 | 6,894,760.00 | 1,000,000.00 | 68,947.60 | 6,894,760,000.00 |
Quick Formulas
ksi → MPa⧉
MPa = ksi × 0.145038
Primary conversion
MPa → ksi⧉
ksi = MPa × 6.89476
Reverse conversion
ksi → kPa⧉
kPa = ksi × 0.000145
To kPa
ksi → psi⧉
psi = ksi × 0.001
To psi
ksi → bar⧉
bar = ksi × 0.014504
To bar
ksi → Pa⧉
Pa = ksi × 0
To Pa
Planning notes, formulas, and examples
About the ksi to MPa Converter
Ksi (kilopounds per square inch) and MPa (megapascals) are two of the main units used to describe material strength, including yield strength, tensile strength, and fatigue limits. US specifications often use ksi, while international standards usually use MPa. The exact conversion is 1 ksi = 6.89476 MPa.
This converter is useful when you are reading mixed-unit datasheets, comparing domestic and international material grades, or moving design values between imperial and metric references. It converts in both directions and also shows related values in GPa, psi, bar, and kPa so the result can be reused in other engineering contexts. That makes it practical for stress limits, proof loads, and allowable values where you need the number in the right system before passing it into another calculation.
It also works as a quick check against common benchmarks such as mild steel, aluminum alloys, and bolt grades before you decide whether a reported strength looks reasonable.
When This Page Helps
Use this converter when a datasheet, code table, or material cert switches between ksi and MPa and you want the exact value without manual math.
It is useful for structural steel, bolts, aluminum alloys, and lab data where the unit system changes but the strength requirement does not. It also keeps the result easy to compare against common engineering benchmarks without repeated conversion work.
How to Use the Inputs
- Select the input unit from the dropdown menu.
- Enter your pressure value in the input field.
- View all converted values in the output cards below.
- Use the preset buttons for common values.
- Review the conversion table for a range of values.
- Expand the reference section to see real-world pressure examples.
- Check the quick formulas for the mathematical relationships.
Formula used
ksi to MPa: MPa = ksi × 6.89476
MPa to ksi: ksi = MPa ÷ 6.89476
ksi to psi: psi = ksi × 1,000
MPa to Pa: Pa = MPa × 1,000,000Example Calculation
Result: 248.2 MPa
36 ksi × 6.89476 = 248.2 MPa. This is the minimum yield strength of ASTM A36 structural steel.
Tips & Best Practices
- A36 structural steel: 36 ksi = 250 MPa yield strength.
- For quick estimation: ksi × 7 ≈ MPa (within 1.5%).
- 1 ksi = 1,000 psi = 6.895 MPa.
- Concrete compressive strength: typically 3-5 ksi (21-34 MPa).
- High-strength bolts: A325 = 120 ksi (827 MPa), A490 = 150 ksi (1034 MPa).
- Aluminum alloys range from 10-80 ksi (69-552 MPa) yield strength.
Material Strength Units
Structural engineers constantly convert between ksi and MPa when reading datasheets, design codes, and research papers. US codes (AISC, ACI) use ksi, while international codes (Eurocode, ISO) use MPa. Understanding both is essential for global practice.
Common Material Strengths
Mild steel (A36): 36 ksi / 250 MPa. High-strength steel (A992): 50 ksi / 345 MPa. Stainless 304: 31 ksi / 215 MPa. Aluminum 6061-T6: 40 ksi / 276 MPa. These values are yield strengths.
Elastic Modulus
Steel elastic modulus: 29,000 ksi = 200 GPa. Aluminum: 10,000 ksi = 69 GPa. These constants are fundamental to structural analysis.
Sources & Methodology
Last updated:
Frequently Asked Questions
1 ksi = 6.89476 MPa. This conversion is fundamental in structural engineering and material science, especially when comparing domestic steel grades with international standards.
Ksi stands for kilopounds per square inch, or 1,000 psi. It is the standard US unit for material mechanical properties like yield strength, tensile strength, and elastic modulus, where the values would otherwise be inconveniently large in psi.
ASTM A36 steel has a minimum yield strength of 36 ksi, which is about 248 MPa. Its tensile strength range of 58-80 ksi converts to roughly 400-552 MPa, which is why both units are often shown on specs.
Divide MPa by 6.89476. For example, 300 MPa ÷ 6.89476 = 43.51 ksi, which is the same form you would use in a US-oriented drawing or report.
1 ksi = 1,000 psi. Ksi is used for larger pressures and stresses such as material properties, while psi is used for lower pressures such as tire inflation and fluid systems.
High-strength steel typically has a yield strength of 50+ ksi, or about 345+ MPa. Ultra-high-strength steels exceed 100 ksi, which is about 690 MPa, and are used where compact design or weight savings matter.
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