What Is the LDL Cholesterol Calculator?
This calculator estimates your LDL ("bad") cholesterol using the Friedewald equation, the most widely used formula for deriving LDL from a standard lipid panel. Instead of measuring LDL directly, most labs estimate it from total cholesterol (TC), HDL cholesterol, and triglycerides (TG). This tool is informational and not a substitute for medical advice.
How to Use It
Select your unit system (mg/dL is common in the US; mmol/L is common in most other countries). Enter your total cholesterol, HDL, and triglyceride values from a fasting lipid panel, then read your estimated LDL plus your non-HDL cholesterol.
The Formula Explained
In mg/dL:
Worked Example
With TC = 200, HDL = 50, and TG = 150 mg/dL:
使用注意事項與精準校對原則（6 大核心守則）
📐 1. 嚴格對齊輸入量綱與單位
輸入各項數值時請務必確認量綱（例如小時、天數、金額、百分比），避免單位不匹配引發推算偏差。
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所有計算邏輯 100% 在您的終端瀏覽器內完成，資料絕不上傳伺服器，嚴格守護商業與個人隱私。
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演算法嚴格遵循國際通用數學公式與標準計算模型，經多重情境交叉核對，數值嚴密精確。
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支援一鍵複製推算結果字串至剪貼簿，亦可直接點擊列印按鈕輸出純淨 PDF 工作報表。
🔄 5. 多情景敏感度動態對比
建議針對極端值與多組預期情景分別試算，觀察輸出數據的波動區間，輔助做出更穩健的決策。
🛡️ 6. 專業諮詢與日常參考免責聲明
本工具運算結果供日常排程、學業研習與事前參考之用，如涉及重大法規或投資決策請諮詢持證專家。