The Relative Velocity Calculator helps determine the relative speed between two objects when the velocities of each relative to a third object are known.

Enter any two values, the calculator provides the missing relative velocity, useful in physics and motion calculations.

**How to Use**

**Enter any two values** from the following:
**Vab**: The relative velocity of object A with respect to object B.
**Vbc**: The relative velocity of object B with respect to object C.
**Vac**: The relative velocity of object A with respect to object C.

**Calculate**: Click the “Calculate” button to solve for the missing value.
**Reset**: Click “Reset” to clear all fields and start a new calculation.

### Example Calculations

**Example 1:**

Step |
Value |

Vbc |
15 m/s |

Vac |
25 m/s |

**Calculate Vab** |
Vac – Vbc |

**Result (Vab)** |
10 m/s |

In this example, with Vbc at 15 m/s and Vac at 25 m/s, Vab (velocity of A relative to B) calculates to 10 m/s.

**Example 2:**

Step |
Value |

Vab |
8 m/s |

Vbc |
12 m/s |

**Calculate Vac** |
Vab + Vbc |

**Result (Vac)** |
20 m/s |

Here, with Vab at 8 m/s and Vbc at 12 m/s, Vac (velocity of A relative to C) results in 20 m/s.