True Strain Calculator
Free calculate true strain (logarithmic strain) from initial and final lengths. true strain accounts for the changing reference length during deformation.
Input Parameters
Results
Enter lengths to calculate true strain
True Strain Formula
True Strain
ε_true = ln(L / L₀)
Where L = final length, L₀ = initial length
Engineering Strain
ε_eng = (L - L₀) / L₀
For comparison
Relationship
ε_true = ln(1 + ε_eng)
For small strains, they are approximately equal
Applications
- • Material testing
- • Plastic deformation
- • Large deformations
- • Metal forming