Method
Equation
ΔL = α × 10⁻⁶ × L × ΔTLfinal = L + ΔLGeometry
Thermal Expansion Calculator for Machined Parts
Choose a material, enter the known size and its measurement temperature, then choose the target temperature. Dimvo returns the corrected size and change in both micrometres and millimetres.
Decimal points and decimal commas are accepted.
Reference temperature°C
Use an exact material coefficient
Size at 20 °C
Corrected size at 20 °C
99.99766 mm
Contraction
2.34 µm
Change in millimetres
-0.00234 mm
Change per 100 mm
-2.34 µm
Temperature change
-2 °C
Built-in material choices are generic planning profiles. Use a certificate or traceable alloy-specific coefficient for tight-tolerance or safety-critical work.
Quick use
How to use this calculator
- Choose one-size correction or hole-and-shaft fit mode.
- Enter the known size, material and temperature.
- Calculate at 20 °C or the operating temperature; use an exact coefficient in advanced mode when required.
Limits
Assumptions
- Constant user-entered coefficient
- Uniform temperature
- Free unconstrained expansion
Provenance
Independent calculation
Generated from the displayed equation and user inputs. This page does not reproduce a standard or third-party table.
Common questions
Frequently asked questions
What is the linear thermal expansion formula?
ΔL = α × L × ΔT, with unit conversion applied when α is entered in µm/m·K.
Does the calculator model constrained parts?
No. Constrained expansion creates stress and requires a mechanical model beyond this free linear-growth calculation.