KSI to MPa & MPa to KSI Converter

Convert between KSI (kilopound per square inch) and MPa (megapascal) with precision.

Easily convert pressure and stress values between KSI and MPa. Supports both directions, batch conversion, and precision control. Ideal for engineering, material science, and academic use.

Examples

Click on any example to load it into the calculator.

Convert 10 KSI to MPa

single

A typical yield strength value in KSI converted to MPa.

Value: 10

Direction: KSI to MPa

Precision: 2

Convert 70 MPa to KSI

single

A common concrete compressive strength in MPa converted to KSI.

Value: 70

Direction: MPa to KSI

Precision: 2

Batch Conversion: Multiple KSI Values to MPa

batch

Convert several KSI values (5, 12.5, 20) to MPa at once.

Value: undefined

Direction: KSI to MPa

Precision: 3

Batch Values: 5, 12.5, 20

Batch Conversion: Multiple MPa Values to KSI

batch

Convert multiple MPa values (50, 100, 150) to KSI.

Value: undefined

Direction: MPa to KSI

Precision: 4

Batch Values: 50, 100, 150

Other Titles
Understanding KSI to MPa & MPa to KSI Converter: A Comprehensive Guide
Master pressure and stress unit conversions for engineering, science, and industry.

What is the KSI to MPa & MPa to KSI Converter?

  • Core Concepts and Definitions
  • Why Unit Conversion Matters
  • KSI and MPa in Engineering
The KSI to MPa & MPa to KSI Converter is a specialized tool designed for engineers, scientists, and students who need to convert between two widely used units of pressure and stress: KSI (kilopound per square inch) and MPa (megapascal). KSI is common in the United States and imperial-based systems, while MPa is the standard SI unit used globally. Accurate conversion is essential for interpreting material properties, test results, and engineering specifications across different standards.
Why Accurate Unit Conversion is Critical
In engineering and science, using the correct units is vital for safety, compliance, and performance. Converting between KSI and MPa ensures that material strengths, design loads, and test data are correctly interpreted regardless of the original measurement system. This tool eliminates manual calculation errors and streamlines workflows for professionals and students alike.
KSI and MPa: Definitions and Context
KSI (kilopound per square inch) is a unit of pressure or stress equal to 1,000 pounds-force per square inch. MPa (megapascal) is a metric unit equal to one million pascals or one newton per square millimeter. Both units are used to express yield strength, ultimate strength, and other material properties in engineering and material science.

Key Concepts:

  • 1 KSI = 6.89476 MPa
  • 1 MPa = 0.145038 KSI
  • KSI is often used in US steel and concrete specifications
  • MPa is standard in international codes and research

Step-by-Step Guide to Using the Converter

  • Input Methods
  • Selecting Conversion Direction
  • Precision and Batch Conversion
To use the converter, enter a value in the input field and select the conversion direction (KSI to MPa or MPa to KSI). Optionally, set the decimal precision (1-6) for the result. For batch conversion, enter multiple values separated by commas. The tool will convert each value using the selected settings and display the results in a clear, copyable format.
Choosing the Right Direction
Select 'KSI to MPa' to convert imperial values to metric, or 'MPa to KSI' for the reverse. The direction determines which formula is used and how the input is interpreted.
Precision and Batch Conversion
Set the desired decimal precision for your results. For multiple values, use the batch conversion field to process all at once, saving time and reducing errors.

How to Use:

  • Convert 15 KSI to MPa with 2 decimal places
  • Convert 100 MPa to KSI with 4 decimal places
  • Batch convert: 5, 10, 20 KSI to MPa
  • Batch convert: 50, 100, 150 MPa to KSI

Real-World Applications of KSI and MPa Conversion

  • Engineering Design
  • Material Testing
  • Academic Research
Engineers use KSI and MPa conversions when designing structures, selecting materials, and interpreting test results. Material scientists rely on these conversions to compare data from different sources. Students and researchers use the tool for homework, lab reports, and publications.
Structural Engineering and Construction
In the US, steel and concrete strengths are often specified in KSI, while international projects use MPa. Converting between these units ensures compliance with codes and standards worldwide.
Laboratory and Quality Control
Testing labs report results in both units to meet client and regulatory requirements. Accurate conversion is essential for quality assurance and certification.

Applications:

  • Steel yield strength: 50 KSI = 344.74 MPa
  • Concrete compressive strength: 40 MPa = 5.80 KSI
  • Test report conversion for international clients
  • Academic research comparing US and EU standards

Common Misconceptions and Correct Methods

  • Avoiding Calculation Errors
  • Understanding Unit Context
  • Best Practices
A common mistake is to use the wrong conversion factor or direction. Always verify whether you are converting from KSI to MPa or vice versa. Double-check input values and units, especially when working with batch conversions or published data.
Unit Context Matters
KSI and MPa are both units of pressure/stress, but their use depends on regional standards and industry practices. Always confirm which unit is required for your application.
Best Practices for Reliable Conversion
Use this tool to avoid manual errors, ensure consistent precision, and document your conversions for traceability in reports and calculations.

Tips & Warnings:

  • Always check the direction of conversion
  • Use batch conversion for efficiency
  • Document your results for traceability
  • Consult standards for required units

Mathematical Derivation and Examples

  • Conversion Formulas
  • Worked Examples
  • Batch Calculations
Conversion Formulas

KSI to MPa: MPa = KSI × 6.89476 MPa to KSI: KSI = MPa ÷ 6.89476

Example Calculations

Example 1: Convert 12 KSI to MPa MPa = 12 × 6.89476 = 82.73712 Result: 82.74 MPa (rounded to 2 decimals)

Example 2: Convert 100 MPa to KSI KSI = 100 ÷ 6.89476 = 14.5038 Result: 14.50 KSI (rounded to 2 decimals)

Batch Example

Batch: 5, 10, 15 KSI to MPa Results: 34.47, 68.95, 103.42 MPa (rounded to 2 decimals)

Formulas & Examples:

  • KSI to MPa: MPa = KSI × 6.89476
  • MPa to KSI: KSI = MPa ÷ 6.89476
  • 12 KSI = 82.74 MPa
  • 100 MPa = 14.50 KSI