Relativistic Velocity Addition (Sum)

Calculate Relativistic Velocity Addition instantly with the exact formula and a worked example.

Relativistic Velocity Addition

u (m/s)
v (m/s)
Sum (m/s)
180,000,000
w = (u+v) / (1 + uv/c²)Calculate Relativistic Velocity Addition instantly with the exact formula and a worked example.
u + v classical
200 000 000 m/s
Relativistic
180 000 000 m/s

More about: Relativistic Velocity Addition (Sum)

What it calculates

The “Relativistic Velocity Addition (Sum)” calculator computes Sum (m/s) from 2 parameters: u (m/s), v (m/s).

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters u (m/s) = 100,000,000, v (m/s) = 100,000,000 the result is 180,000,000 (w = (u+v) / (1 + uv/c²)).

How to use

  1. Enter u (m/s) and v (m/s) — each field above is adjustable with a slider.
  2. Sum (m/s) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is Relativistic Velocity Addition (Sum) calculated?
The Relativistic Velocity Addition (Sum) calculator computes Sum (m/s) from u (m/s), v (m/s). Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Relativistic Velocity Addition (Sum) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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