精密計算機

Regular Polygon Area Calculator — Any Number of Sides

Regular Polygon Area Calculator: Calculate the area of any regular polygon — pentagon, hexagon, octagon, and beyond — from the number of sides

正多角形

材料廃棄物係数オプション

材料費の見積りオプション

Calculation Results

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部屋、形状、素材、屋外エリア、単位換算など、プロジェクトに合わせて専用の計算機を選択してください。

部屋計算機 → 住宅計算機 → 寝室の計算機 → バスルーム計算機 → キッチン電卓 → Multiple Rooms → 長方形計算機 → 三角形の計算機 → 円計算機 → 台形計算機 → Regular Polygon Calculator → 不規則な形状 → Odd Shape → Uneven Sides → 床材計算機 → タイル計算機 → ペイント計算機 → 具体的な計算機 → 断熱計算機 → 芝生計算機 → ヤード計算機 → 造園計算機 → プール計算機 → ガレージ電卓 → 屋根計算機 → 壁計算機 → Feet & Inches → インチ計算機 → Height Width Length → 平方フィート 宛先 エーカー → Cubic Yards Calculator →
1 ft (12 in) 1 ft 1 ft² = 144 in²

Regular Polygon Area Calculator

Select the Regular Polygon shape, enter the number of sides (3 or more) and the length of one side, then click Calculate. The calculator applies the formula Area = (n × s²) / (4 × tan(π/n)) to instantly find the area of any regular polygon — triangles, pentagons, hexagons, octagons, and beyond — in square feet, square yards, square meters, and acres.

If you already know the polygon area from a deed or survey, switch to the Known Area shape to convert it between area units instead. For an irregular polygon with unequal sides, break it into rectangles and triangles, calculate each section, and add the results.

仕組み

1

形状の選択

Choose the shape that matches your space.

2

寸法を入力してください

測定値を任意の単位で入力します。数量、廃棄係数、材料価格を追加します。

3

結果を取得する

面積 (ft²、in²、yd²、m²、エーカー) とコスト見積もりをすべて一度に表示します。

よくある質問

Select the Regular Polygon shape, enter the number of sides (3 or more) and the length of one side, then click Calculate. The tool applies the formula Area = (n × s²) / (4 × tan(π/n)) automatically for pentagons, hexagons, octagons, and any other regular polygon.
Yes. Enter 5 for a pentagon or 6 for a hexagon in the Number of Sides field, enter the side length, and click Calculate. The same Regular Polygon calculator handles any number of equal sides, 3 and up.
Switch to the Known Area shape if you already know the area, or break the irregular polygon into rectangles and triangles, calculate each section with this calculator, and add the results together.
If you know the overall area in acres or square meters from a deed or survey, use the Known Area option to convert to square feet. Otherwise, divide the lot into measurable geometric shapes, calculate each, and add them up.
A tape measure or laser distance meter for indoor spaces. For outdoor lots, use a measuring wheel, GPS surveying app, or satellite images with a scale tool. For the most accurate results, hire a professional surveyor.
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