長方形、正方形、三角形、円、扇形、台形、平行四辺形、楕円の面積と単位換算を正確に計算。 2026最新の公的基準（ECB • ISO Standard）およびCalconovaのIEEE-754（Decimal.js）高精度演算エンジンに基づき、誤差のないシミュレーション結果と詳細な内訳を即座に算出します。
面積計算機: 長方形、正方形、三角形、円、扇形、台形、平行四辺形、楕円の面積と単位換算を正確に計算。 2026最新の公的基準（ECB • ISO Standard）およびCalconovaのIEEE-754（Decimal.js）高精度演算エンジンに基づき、誤差のないシミュレーション結果と詳細...Temel formül: Dikdörtgen: w × l | Kare: a² | Yamuk: ((a+b)h)/2 | Üçgen: (bh)/2 | Heron: √(s(s-a)(s-b)(s-c)) | Daire: πr² | Dilim: πr²(θ/360) | Düzgün Çokgen: (n·s²)/(4·tan(π/n)).
面積 = 幅 (w) × 長さ (l) | 周囲 = 2(w + l)
Dikdörtgen: w × l | Kare: a² | Yamuk: ((a+b)h)/2 | Üçgen: (bh)/2 | Heron: √(s(s-a)(s-b)(s-c)) | Daire: πr² | Dilim: πr²(θ/360) | Düzgün Çokgen: (n·s²)/(4·tan(π/n))Surface area is the two-dimensional extent of a shape. Calconova utilizes an exact Decimal.js arithmetic engine to prevent floating point inaccuracies across all unit conversions.
This calculator is built on deterministic mathematical and algorithmic models. Results are simulations for educational and estimation purposes and should not be used as official or legally binding records.
The area of a trapezoid is computed by multiplying the average of its parallel bases (a and b) by its perpendicular height (h). Formula: A = ((a + b) × h) / 2
First find the semi-perimeter s = (a + b + c) / 2. Then apply Heron's formula: A = √(s(s-a)(s-b)(s-c)). Note that the triangle inequality theorem must hold (sum of any two sides must exceed the third).
For an n-sided regular polygon with side length s, area is: A = (n × s²) / (4 × tan(π / n)).
1 Decare / Donum equals exactly 1,000 square meters. 1 Hectare equals 10,000 square meters (10 decares).
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