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Spring force and energy

Spring force and energy: calculate a transparent estimate from the values and assumptions you provide.

Spring force and energy: calculate a transparent estimate from the values and assumptions you provide.

Both dots and commas are accepted as decimal separators.

Your inputs stay in your browser. Displayed results are rounded to a maximum of 12 significant digits.

Method and assumptions

Method version 1.0.0 · Updated

Calculate

Formula: |F| = k|x|; energy = ½kx²

Spring force and energy: calculate a transparent estimate from the values and assumptions you provide.

springConstant
Spring constant k (N/m)
extensionM
Signed extension (m)

Valid only within the spring’s linear elastic range.

Calculate with code

These short examples use the same inputs and core calculation as this tool. Adapt validation and formatting to your application.

JavaScript
const forceN = 200 * 0.1; const energyJ = 0.5 * 200 * 0.1 ** 2; // 20 N; 1 J