Mechanical Engineering
Strain Calculator
📐 ε = ΔL / L
Calculate strain, stress, and modulus of elasticity in materials.
Strain (ε)
Original Length (L₀)
mm
Original length of the material
Change in Length (ΔL)
mm
Change in length (extension or compression)
Strain (ε)
—
Strain (dimensionless, ΔL / L₀)
Stress & Modulus
Stress (σ)
MPa
Stress in megapascals (MPa)
Young's Modulus (E)
MPa
Young's modulus in megapascals (MPa)
ε
=
ΔL
/
L₀
|
E
=
σ
/
ε
Strain
0
Calculated Strain
0
ε = ΔL / L₀
Original Length (L₀)
0 mm
Change in Length (ΔL)
0 mm
Strain (ε)
0
Stress / Modulus
0 MPa / 0 MPa
📊 Detailed Breakdown
| Quantity | Value | Formula |
|---|
How the formula works
ε = ΔL / L₀ | σ = F / A | E = σ / ε
- Strain (ε) = Change in Length / Original Length (dimensionless)
- Stress (σ) = Force / Cross-Sectional Area
- Young's Modulus (E) = Stress / Strain (within elastic limit)
- Enter any two values to calculate the third
- Strain is typically expressed as a decimal or percentage
- Common materials: Steel (E ≈ 200,000 MPa), Aluminum (E ≈ 70,000 MPa)
- Positive strain = tension (stretching), Negative strain = compression