Physics

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Curie's Law Calculator.

Calculate paramagnetic susceptibility from Curie constant and absolute temperature.

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Set your values

Results update as you type.

susceptibility: 0.000033

susceptibility

0.000033

Results update automatically as you type.

This page applies only the stated idealized equation and explicit inputs; verify specialized engineering, medical, or safety decisions against applicable standards.

Use Cases

Physics Lab Experiments

Quickly compute susceptibility for paramagnetic salts or gases in educational settings, verifying theoretical predictions.

Example: Given C = 1.2 K and T = 300 K, susceptibility = 0.004

Material Science Research

Estimate susceptibility of paramagnetic materials at different temperatures to characterize their magnetic behavior.

Example: Compare susceptibility at 77 K and 300 K for a sample with C = 0.5 K

Frequently Asked Questions

What is Curie's Law?
Curie's Law states that the magnetic susceptibility of a paramagnetic material is inversely proportional to its absolute temperature. The formula is χ = C/T, where χ is susceptibility, C is the Curie constant, and T is the absolute temperature in Kelvin.
What units should I use for the Curie constant and temperature?
Both the Curie constant and absolute temperature should be entered in Kelvin (K). The calculator uses these values directly to compute susceptibility, which is dimensionless.
Can this calculator be used for ferromagnetic materials?
No, Curie's Law applies only to paramagnetic materials above their Curie temperature. For ferromagnetic materials, the relationship between susceptibility and temperature is different and not covered by this calculator.

Tips & Common Mistakes

Tips

  • Ensure the temperature is in Kelvin, not Celsius or Fahrenheit, for accurate results.
  • The Curie constant is material-specific; refer to literature or experimental data for your substance.
  • This calculator assumes ideal paramagnetic behavior; deviations may occur at very low temperatures or high fields.
  • Double-check your inputs for consistency; both fields must be positive numbers.

Common Mistakes to Avoid

  • Entering temperature in Celsius or Fahrenheit instead of Kelvin, leading to incorrect susceptibility.
  • Using the Curie constant without converting to Kelvin if it's given in other units.
  • Confusing Curie's Law with Curie-Weiss Law, which includes a correction for interactions between magnetic moments.

Last updated: August 13, 2026