Parabola Calculator
( Parabola Grapher Online )
Parabola Vertex Focus Calculator Formulas
(Y = aX2 + bX + c, a≠0)
• Focus X = -b/2a
• Focus Y = c - (b2 - 1)/4a
• Vertex X = -b/2a
• Directrix Y = c - (b2 + 1)/4a
• X Intercept = -b/2a ± √(b * b - 4ac)/2a,0
Parabola equation and graph with major axis parallel to y axis. If a>0, parabola is upward, a<0, parabola is downward. If the major axis is parallel to the x axis, interchange x and y during your calculation.
click here for parabola equation solver.
Segment of a Parabola Calculator
Segment of a Parabola Formulas
• Area = 2 * h * b;
• Arc Length = sqrt(b 2 + 16 * h 2)/2 + b 2 * ln((4 * h + sqrt(b 2 + 16 * h 2))/b)/(8*h)
| 
