Science calculator
Thermal Expansion Calculator
Calculate linear thermal expansion.
About the thermal expansion calculator
The thermal expansion calculator computes linear expansion using ΔL = αL₀ΔT.
How to use this calculator
- 1
Enter original length
Enter the initial length in meters.
- 2
Enter coefficient
Enter the linear expansion coefficient (12×10⁻⁶/K for steel by default).
- 3
Enter temperature change
Enter ΔT in Kelvin.
How the calculation works
ΔL = α × L₀ × ΔT. Steel: α ≈ 12×10⁻⁶/K.
Example: 1m steel, ΔT=100K: ΔL≈1.2mm.
Understanding scientific constants
Key constants used: g = 9.81 m/s² (Earth gravity), c = 299,792,458 m/s (speed of light), G = 6.674×10⁻¹¹ N·m²/kg² (gravitational constant), h = 6.626×10⁻³⁴ J·s (Planck's constant), R = 8.314 J/(mol·K) (ideal gas constant). Results assume ideal conditions — real-world measurements may vary.
Ideal vs. real-world conditions
Most physics calculators assume ideal conditions: no air resistance, perfect vacuums, uniform gravity. Real-world results will differ due to friction, air resistance, temperature variations, and measurement uncertainty. Use these tools for learning and estimation, not precision engineering.
Important limitations
This tool provides a mathematical estimate based only on the values entered. It does not account for regulations, taxes, lender fees, market conditions, or individual circumstances. Results are for planning purposes only — consult a qualified professional for regulated, medical, financial, or construction decisions.
Frequently asked questions about thermal expansion calculator
How accurate is the thermal expansion calculator?+
The calculation follows the displayed formula and retains full numeric precision before formatting the result.
Can I use the result professionally?+
Use it as a planning estimate. Confirm regulated, medical, financial, or construction decisions with a qualified professional.