Yield Strength Converter - Convert MPa, PSI, GPa, ksi & More Units
Result:
1 MPa = 145.03768079 psi
How It Works
Our yield strength converter is very easy to use. Just follow three simple steps to convert between different stress units. The calculator uses accurate formulas to give you instant results.
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Pick the unit you have and the unit you need
What is Yield Strength?
Yield strength is the amount of stress a material can handle before it starts to bend or change shape permanently. Think of it like this: if you bend a paper clip a little bit, it springs back. But if you bend it too much, it stays bent. The point where it stops springing back is the yield strength.
Engineers and designers use yield strength to make sure buildings, bridges, cars, and machines are safe and strong. They need to know how much force a material can take before it breaks or bends. This helps them choose the right materials for each job.
Yield strength is measured in units like MPa (megapascals), PSI (pounds per square inch), or GPa (gigapascals). Different materials have different yield strengths. Steel is very strong, aluminum is lighter but weaker, and plastic is much weaker than metal.
Definition
Yield strength is the maximum stress a material can handle before it bends or deforms permanently without breaking.
Purpose
Used by engineers to design safe structures, choose materials, and ensure products can handle expected loads and forces.
Applications
Building construction, automotive design, aerospace engineering, manufacturing, and quality control testing.
Common Examples of Yield Strength
Here are real examples showing the yield strength of common materials. These values help engineers choose the right material for each project based on how much stress it needs to handle.
🏗️ Structural Steel
Yield Strength: 250-400 MPa
Equals: 36,000-58,000 PSI
Used in buildings and bridges
✈️ Aluminum Alloy
Yield Strength: 200-500 MPa
Equals: 29,000-72,500 PSI
Used in aircraft and cars
🔩 Stainless Steel
Yield Strength: 200-300 MPa
Equals: 29,000-43,500 PSI
Used in kitchen and medical tools
🚗 High Strength Steel
Yield Strength: 550-700 MPa
Equals: 80,000-101,500 PSI
Used in car safety parts
⚙️ Titanium Alloy
Yield Strength: 800-1000 MPa
Equals: 116,000-145,000 PSI
Used in aerospace and medical implants
🔨 Tool Steel
Yield Strength: 500-900 MPa
Equals: 72,500-130,500 PSI
Used in cutting and drilling tools
Yield Strength Conversion Formulas
MPa to PSI
PSI = MPa × 145.038
Example: 300 MPa = 43,511 PSI
GPa to ksi
ksi = GPa × 145.038
Example: 0.4 GPa = 58.0 ksi
N/mm² to MPa
MPa = N/mm² × 1
Example: 350 N/mm² = 350 MPa
ksi to MPa
MPa = ksi × 6.895
Example: 50 ksi = 344.7 MPa
Yield Strength Conversion Table
This table shows how different yield strength values convert between common units. Use it as a quick reference guide when working with materials. All conversions are accurate and follow standard engineering formulas.
| MPa | PSI | ksi | GPa | N/mm² | kgf/cm² |
|---|---|---|---|---|---|
| 200 | 29008 | 29.0 | 0.20 | 200 | 2039 |
| 250 | 36260 | 36.3 | 0.25 | 250 | 2549 |
| 300 | 43511 | 43.5 | 0.30 | 300 | 3059 |
| 350 | 50763 | 50.8 | 0.35 | 350 | 3569 |
| 400 | 58015 | 58.0 | 0.40 | 400 | 4079 |
| 450 | 65267 | 65.3 | 0.45 | 450 | 4589 |
| 500 | 72519 | 72.5 | 0.50 | 500 | 5099 |
| 550 | 79771 | 79.8 | 0.55 | 550 | 5608 |
| 600 | 87023 | 87.0 | 0.60 | 600 | 6118 |
| 650 | 94275 | 94.3 | 0.65 | 650 | 6628 |
| 700 | 101527 | 101.5 | 0.70 | 700 | 7138 |
| 750 | 108779 | 108.8 | 0.75 | 750 | 7648 |
| 800 | 116030 | 116.0 | 0.80 | 800 | 8158 |
| 850 | 123282 | 123.3 | 0.85 | 850 | 8667 |
| 900 | 130534 | 130.5 | 0.90 | 900 | 9177 |
*All conversions use standard engineering formulas and are accurate for material testing
Frequently Asked Questions
What is yield strength in simple words?
Yield strength is the maximum stress a material can handle before it starts to bend or deform permanently. It tells us how strong a material is before it changes shape and does not spring back.
How do I convert MPa to PSI?
To convert MPa to PSI, multiply the MPa value by 145.038. For example, 300 MPa equals 43,511 PSI. You can use our calculator above to do this conversion instantly.
What is the difference between yield strength and tensile strength?
Yield strength is when a material starts to bend permanently. Tensile strength is when it actually breaks. Yield strength is always lower than tensile strength for the same material.
Why is yield strength important?
Yield strength helps engineers design safe structures and products. They use it to make sure materials can handle expected loads without bending or breaking. This keeps buildings, bridges, and machines safe.
What materials have high yield strength?
Titanium alloys, tool steel, and high-strength steel have very high yield strength (500-1000 MPa). These materials are used when you need something very strong like in aircraft parts or cutting tools.
Is N/mm² the same as MPa?
Yes, N/mm² (newtons per square millimeter) is exactly the same as MPa (megapascals). They are just different ways to write the same unit. 1 N/mm² = 1 MPa.
How accurate is this yield strength converter?
This converter uses standard engineering conversion factors and is very accurate. All formulas are verified and match industry standards used by engineers and material scientists worldwide.
What is the yield strength of common steel?
Common structural steel has a yield strength of about 250-400 MPa (36,000-58,000 PSI). This is strong enough for most building and construction projects. High-strength steel can be much stronger.
Yield Strength Units Progression Chart
200 MPa
300 MPa
400 MPa
500 MPa
600 MPa
800 MPa
Practice Problems
Problem 1:
Convert 350 MPa to ksi
Solution: 350 × 0.145038 = 50.8 ksi
Problem 2:
Convert 60 ksi to MPa
Solution: 60 × 6.895 = 413.7 MPa
Problem 3:
Convert 0.5 GPa to N/mm²
Solution: 0.5 × 1000 = 500 N/mm²
Problem 4:
Convert 45,000 PSI to GPa
Solution: 45,000 ÷ 145,038 = 0.310 GPa
Problem 5:
Convert 400 N/mm² to kgf/cm²
Solution: 400 × 10.197 = 4,079 kgf/cm²
Daily Uses of Yield Strength
Steel beam design requires specific yield strength values
Automotive safety components must meet yield strength standards
Pipeline materials selection based on yield strength requirements
Aircraft structural components need certified yield strength values
Construction fasteners must exceed minimum yield strength limits
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Dr. Jane Doe
VerifiedExpert Reviewer & Mathematician
Last Updated: May 19, 2026