Linear Thermal Expansion Equation and Calculator

Heat Transfer Engineering

Linear Section Thermal Expansion Equation and Calculator

Linear expansion is the change in length as opposed to change in volume. To a first approximation, the change in length measurements of an object due to thermal expansion is related to temperature change by a "linear expansion coefficient". It is the change in length per degree of temperature change.

Linear Expansion

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Preview: Calculator Change of Length

ΔL = α l0 ΔT


ΔT = ΔL / α l0


ΔT = End Temperature T1 - Start Temperature T2 (°F, °C)
ΔL = Change in length (in, m) or l1 - l0
l0 = Length (in, m)
l1 = Length (in, m)
α = Coefficient of Thermal Expansion (1/°F, 1/°C). Note: that units may be expressed as in / in-°F, m / m-°C


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