Calculate the latus rectum length for a parabola, ellipse, or hyperbola.
Last updated: June 2026 | By Patchworkr Team
Use the parabola form when only a is needed; ellipses and hyperbolas use both a and b.
Why does the formula change by conic?
The standard parabola definition differs from the ellipse and hyperbola forms used here.
Can the result be negative?
No. The calculator rejects invalid parameters instead of returning a negative length.
Does the tool accept decimals?
Yes. Any finite real value is accepted, including decimal and scientific notation inputs.
Why is b hidden for parabolas?
The parabola formula only depends on a, so b is not needed in that mode.
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