Physics

Velocity Addition Calculator

Add velocities the relativistic way.

Calculated Output

Combined velocity (c) 0.8824

Formula: w = (u + v) ÷ (1 + u·v/c²)

Step-by-Step Breakdown

1. Values used:

2. Velocity u (fraction of c) = 0.6 c

3. Velocity v (fraction of c) = 0.6 c

5. Combined velocity = 0.8824c

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The math behind it

w = (u + v) ÷ (1 + uv/c²), using fractions of c. The result never exceeds c.

0.6c + 0.6c → about 0.882c, not 1.2c.

What if one velocity is c?

The result is exactly c — light moves at c in every frame.