Linear Thermal Expansion Equation and Calculator

Heat Transfer Engineering
Thermodynamics

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

or

ΔT = ΔL / α l0

Where:

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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