ONE FORMULA, ONE ANSWER
Axial Bar Extension Calculator
Check axial length change from a known load and material modulus. Choose input units and calculate one value within the stated conditions.
Inputs
Calculations run in this browser. Scientific notation such as 1.2e-3 is supported. Do not group thousands.
Result
Axial length change δ
Enter values and select Calculate.
δ = F L / (A E)
Assumptions
Use L,A,E>0. Assume uniform area, material and axial force, linear elasticity and small strain. Compression gives a negative result. Buckling and plastic deformation are excluded.
Displayed values are floating-point approximations. Measurement uncertainty and design safety factors are not calculated.
Formula references and credits
NaNa Lab created the code, descriptions, icons and preview images. Text, figures and code from the linked references have not been reproduced.
Physical constants: NIST / CODATA 2022. The values of μ₀ and ε₀ are measured recommendations, not exact defining constants. Values and precision notes are in the source record.
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