Linear Expansion - Thermal Expansion

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Linear Expansion - Thermal Expansion

Notation and Units

Metric and Imperial Units

The above formulas may be used with both imperial and metric units. As with all calculations care must be taken to keep consistent units throughout with examples of units which should be adopted listed below:


  • L = length under consideration, in or mm
  • LF = final length, in or mm
  • L = change in length, in or mm
  • T = change in temperature, ᵒK or ᵒC
  • α = coefficient of thermal expansion, ᵒK-1 or ᵒC-1

Additional Resources

  1. LD Didacting GmbH. Measuring the linear expansion of solids as function of temperature. Germany. Published in "LD Physics Leaflets".
  2. R.Hogan. How to calculate Thermal Epansion. US. 2019. Publised in "".