What Is the Mileage Calculator?
This mileage calculator measures your vehicle's fuel economy in miles per gallon (MPG), the most common efficiency metric used in the United States. By dividing the distance you traveled by the amount of fuel you burned, it tells you exactly how far your vehicle goes on each gallon — a handy way to track efficiency, budget for fuel, or compare cars.
How to Use It
Fill up your tank completely and reset your trip odometer. Drive normally until you need to refuel, then fill up again and note how many gallons it took. Enter the miles shown on your trip odometer and the gallons added at the second fill-up. The calculator returns your MPG along with gallons used per 100 miles.
The Formula Explained
The core formula is simply:
A higher MPG means better efficiency. The secondary figure, gallons per 100 miles, is calculated as
Worked Example
Suppose you drove 300 miles and used 12 gallons of gasoline. Your fuel economy is
使用注意事項與精準校對原則（6 大核心守則）
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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。
📊 3. 符合公認學術與產業計算模型
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。
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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。