How it works
Find the slope between two points. Vertical lines have undefined slope and cannot be represented by this numeric result.
m = (y₂−y₁)/(x₂−x₁)
Worked example
Show example inputs and result
x₁: 1 · y₁: 2 · x₂: 4 · y₂: 8.
- Result
- 2
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy