在線即時計算器 · 純前端本地秒算 · 零數據上傳

🧭 Time Of Arrival Eta 計算機

專業免費的 Time Of Arrival Eta 計算機。純前端本機毫秒級計算、零資料上傳、極致隱私保護。提供詳細公式推導、實例示範與常見問答。

即時推算結果 (Computed Output)
11:30 same day (24-hour clock)
專業公認計算模型,即時運算完畢
📜 計算歷史記錄 (試算軌跡)
尚無歷史記錄,每次點擊「計算」將在此留下試算軌跡...

What is the ETA Calculator?

The Time of Arrival (ETA) Calculator estimates when you will reach your destination based on the distance you need to cover, your average travel speed, your departure time, and any planned stops or breaks. It is ideal for road trips, deliveries, cycling, running, or any journey where you want a realistic arrival time on a 24-hour clock.

How to use it

Enter the total distance in kilometres, your average speed in km/h, the hour and minute you depart (24-hour format), and the total minutes you expect to spend stopped (fuel, food, rest). The calculator returns your ETA, the pure driving time, and the total trip duration including stops. If the trip crosses midnight, it shows how many days later you arrive.

The formula explained

Travel time equals distance divided by speed:

t = ((d) ÷ (s))
This is converted to minutes and added to your stop time and your departure time. The arrival is taken modulo 1440 (minutes in a day) to give a clock time, and the number of whole days that elapse is the floor of the total minutes divided by 1440.

\begin{gathered} ETA = ≤ft( T_{dep} + ((Distance (km)) ÷ (Speed (km/h))) × 60 + Stops (min) \right) \bmod 1440 \\[1.5em] where ≤ft{ \begin{aligned} T_{dep} &= Dep. Hour × 60 + Dep. Minute \\ ETA & is in minutes past midnight \end{aligned} \right. \end{gathered}

Worked example

Driving 500 km at 80 km/h gives ((500) ÷ (80)) = 6.25 hours = 375 minutes of driving. Add 45 minutes of stops for 420 minutes total. Leaving at 22:00 (1320 minutes), the arrival is 1320 + 420 = 1740 minutes. Dividing by 1440 gives 1 full day over, with a remainder of 300 minutes = 05:00. So you arrive at 05:00 the next day.

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。

🔒 2. 純前端本機毫秒級隱私保障

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。

📋 4. 一鍵複製與免登入 PDF 匯出

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。

常見問題 (FAQ)

Does it account for traffic?
No — it uses a constant average speed. Lower your average speed to model congestion.
What if I arrive the same day?
The "+days" indicator shows "same day" when no midnight is crossed.
Can I use miles?
The labels say km, but the math is unit-agnostic: enter miles and mph and the time result is identical.