Method
Equation
ΔL = α × 10⁻⁶ × L × ΔTLfinal = L + ΔLGeometry
Thermal Growth calculator
Correct a part size for temperature or check the thermal change in a hole-and-shaft fit.
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 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.
- 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.