Trapezoid Area Calculator

What Trapezoid Area is for

Trapezoid Area Calculator is the page to open when you need trapezoid area from measurements you already have. It belongs with the other math calculators because that is the work this arithmetic supports. The area of that shape is the area of a shape. Type the entries first. The result stays hidden until you press Calculate, so a half-finished form never flashes a number you might mistake for the answer.

How to fill in this calculator

1. Base ( a ). Enter the value this part of the job needs.
2. Base ( b ). Enter the value this part of the job needs.
3. Height ( h ). Enter the value this part of the job needs.

The formula in plain language

Area of a rectangle is length times width. A square uses one side twice. A circle is π times the radius squared. A triangle with three known sides uses Heron's formula: take the semi-perimeter, multiply the four terms, and take the square root. Add the pieces when a room is L-shaped, and multiply by the count when several identical areas repeat.

A worked example

A 12 foot by 14 foot room is 168 square feet, or 18.7 square yards. At $4.50 a square foot the flooring material is $756 before waste.

Area, perimeter, and volume start from the same edges. After this trapezoid area result, volume of a shape and arc length are the related shapes.

Mistakes that move the answer

• Measure to the outside of the area you will cover, then add waste separately instead of stretching the tape.
• Inches must be converted before they are multiplied, or a 6 inch width becomes a 6 foot width.

How to check the result

After Calculate shows the trapezoid area result, redo the last operation with a pencil using the rounded figures on the screen. Matching that check means the inputs were read correctly. If you edit a label or a sentence in this HTML file, reload the page. The form and this article both live in the file, so the edit is what visitors will read.