Strain Calculator
Calculate normal strain from change in length and original gauge length.
LIVE 2D EXPLANATION
ε = ΔL / L₀The geometry, arrow and label respond to the current calculation state.
PRIMARY RESULT
Live calculation ready for review
This is an educational or preliminary result. Apply relevant standards and engineering judgement before use.
ENGINEERING PRINCIPLE
Strain is the relative deformation of a material.
Calculate normal strain from change in length and original gauge length.
FORMULA & VARIABLES
ε = ΔL / L₀
- ε = normal strain (dimensionless)
- ΔL = change in length (m)
- L₀ = original gauge length (m)
CALCULATION STEPS
How this result is assembled
- Convert the entered values to the SI basis required by the formula.
- Apply ε = ΔL / L₀ using the current inputs.
- Present the result as 0.005 mm/mm and review the stated assumptions.
FORMULA VERIFICATION
Units, scope and reference
Reference: NIST SP 811 for unit relationships; standard classical mechanics and strength-of-materials derivations for the stated scalar relation.
Internal basis: All inputs are converted to the calculator’s SI base before the formula is evaluated.
Valid conditions: Positive finite scalar input values in the current calculator model.
Limitations: Small, uniform deformation is assumed. The original gauge length is used as the reference.
ASSUMPTIONS
Use this result in context
- Small, uniform deformation is assumed.
- The original gauge length is used as the reference.
Results must be verified by a qualified engineer and checked against applicable engineering standards, material properties, loading conditions and design requirements.
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OPTIONAL ENGINEERING HELP
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