Parallelogram Calculator
Find the area, perimeter, and interior angles of a parallelogram from its base, slant side, and perpendicular height.
Inputs explained
- Base — Length of the base side.
- Slant side — Length of the adjacent (non-base) side.
- Height (perpendicular to base) — Perpendicular distance between the two base sides. Cannot exceed the slant side.
How to use it
- Fill in the fields above — each input has a hint describing exactly what to enter
- Press Calculate to get your result instantly, right on this page
- Copy the result, save the tool to favorites, or share and embed it anywhere
Understanding the result
Example: With base 6, slant side 4, and height 3, the area is 18, the perimeter is 20, and the acute angle is ≈ 48.59°.
Frequently asked questions
Why does the calculator ask for slant side and height separately instead of just base and side? Area only depends on base and perpendicular height, but the slant side is needed to compute the perimeter and the interior angles, since a parallelogram's tilt can't be determined from base and height alone.
Can the height be larger than the slant side? No, the perpendicular height can never exceed the slant side length, since the height is one leg of a right triangle formed with the slant side as the hypotenuse; entering a height greater than the slant side is geometrically invalid.
Is the Parallelogram Calculator free to use? Yes — it is completely free, with no sign-up, no download and no usage limits. You can use it as often as you need.
Is my data private? Yes. The calculation runs entirely in your browser — the values you enter are never sent to our servers, stored or shared with anyone.
What information do I need? Just the following: Base, Slant side, Height (perpendicular to base). Each field includes a hint explaining exactly what to enter.
Can I use it on my phone? Yes — the tool is fully responsive and works on any device, and the same calculator is available in the EasyWorkCalcs mobile app.
Privacy
Everything you enter into the Parallelogram Calculator is processed entirely in your browser. Nothing is uploaded, stored or shared — your data stays on your device.