Perpendicular Distance Point to Line Calculator
Enter line coefficients A, B, C for Ax + By + C = 0 and point coordinates.
A QUICK WALKTHROUGH
How to use this tool
- Enter line coefficients A, B and C.
- Enter point coordinates x and y.
- Calculate perpendicular distance.
Formula
For line Ax+By+C=0 and point (x₀,y₀), distance d=|Ax₀+By₀+C|/√(A²+B²). A and B cannot both be zero.
Coordinate geometry
All coordinates must use one Cartesian system and unit. Local calculation only.
GOOD TO KNOW
Common questions
Can the line be vertical?
Yes. For x=k, use A=1, B=0, C=−k.