Physics

True Strain Calculator

Convert engineering strain to true strain.

Calculated Output

True strain 0.1823

Formula: ε_true = ln(1 + ε_eng)

Step-by-Step Breakdown

1. Values used:

2. Engineering strain = 0.2

4. True strain = 0.1823

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The math behind it

ε_true = ln(1 + ε_eng). For small strains the two are nearly equal.

20% engineering strain → about 0.182 true strain.

When does the difference matter?

For large plastic deformation, like metal forming.