Math & Statistics
Angle Between Two Lines Calculator
Find the angle between two lines given their slopes.
Your inputs
Change any value to update the result instantly.
Angle between lines
71.5651 °
Lines are perpendicular
0
Lines are parallel
0
Formula and working
tan(θ) = |(m₂ − m₁) ÷ (1 + m₁m₂)|
- 1
Collect the inputs
Slope 1 = 2; Slope 2 = -1
- 2
Apply the formula
tan(θ) = |(m₂ − m₁) ÷ (1 + m₁m₂)|
- 3
Result
Angle between lines = 71.5651 °
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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