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PHYSICS / COLLISIONS

Coefficient of Restitution Calculator

Calculate one-dimensional coefficient of restitution from relative separation and approach speeds. See the governing equation, substituted values, result, assumptions, and interpretation in one guided workspace.

  • 01 Calculated in this tab
  • 02 Values stay in this browser tab
  • 03 Use boundary

Conversion input

Known value

Filter by unit name, symbol, or code. Your current selections remain available.

Preparing the calculator...

Use boundary

Calculation path

Calculate one-dimensional coefficient of restitution from relative separation and approach speeds. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.

Calculation path

e=(v2-v1)/(u1-u2)

What you provide

What you provide

  • First initial velocity expressed in m/s, using the same scenario as the other inputs
  • Second initial velocity expressed in m/s, using the same scenario as the other inputs
  • First final velocity expressed in m/s, using the same scenario as the other inputs
  • Second final velocity expressed in m/s, using the same scenario as the other inputs

What you receive

What you receive

  • Coefficient of restitution from the stated equation
  • A symbolic formula plus substituted working with your values
  • Visible assumptions, field guidance, and an authoritative learning reference

Use boundary

Choose the maximum decimal places shown. This does not increase source accuracy.

Velocities use one signed axis and are measured immediately before and after a one-dimensional impact.

Use internally consistent units and retain extra precision when carrying the result into another calculation.

Reviewed reference factors

Reviewed reference factors