# Check vectors collinearity online calculator

Two vectors are *collinear* if they lie on the same line or on parallel lines:

The definition given above can be written in the formula notation:

where n - some constant (scalar).

If we move from vectors notations to the coordinate ones, the formula above will have the form:

(
a_{x},
a_{y},
a_{z}
) =
n ∙
(
b_{x},
b_{y},
b_{z}
)

Therefore, if two vectors are collinear, the following condition is hold:

Our online calculator checks the collinearity of two vectors with step by step solution for free.

## Input vectors dimension

Vectors dimension
2
3

Vector
representations form:
coordinates
points

Vector
representation form:
coordinates
points

Vector
= { }

Vector
:

Vector
= { }

Vector
: