Spring constant calculator

Spring constant = force magnitude ÷ extension magnitude.

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Force magnitude (N)

Extension magnitude (m)

Answer

…

Spring constant = force magnitude ÷ extension magnitude.

More results

Precision and calculation record

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Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Step-by-step calculation

Inputs are substituted below. Each line evaluates the next operation; intermediate values are displayed to 12 significant digits while the calculation uses full precision.

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Formula and assumptions

Hooke’s law applies only in the spring’s linear elastic range; this result does not establish that range.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Spring constant calculator

Spring constant = force magnitude ÷ extension magnitude.

Hooke’s law applies only in the spring’s linear elastic range; this result does not establish that range.

Next: Elastic potential energy calculator

A worked example

With force magnitude (n) = 30, extension magnitude (m) = 0.1, the spring constant (n/m) is 300.

Before you use the result

Hooke’s law applies only in the spring’s linear elastic range; this result does not establish that range.

Example results for force magnitude (n)

These examples use Extension magnitude (m): 0.1. They are reference calculations, not recommended settings.

Force magnitude (N)	Spring constant (N/m)
15	150
30	300
60	600

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