Duration Sum
Sum working, video or study durations without wrapping after 24 hours.
Pre-filled values are examples, not personal facts or current local rates. Replace them before calculating.
Calculation method and references
Total seconds = sum(hours × 3600 + minutes × 60 + seconds).
Method reviewed: 2026-09-08
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{"fields":[{"key":"durations","label":["每行一個 HH:MM 或 HH:MM:SS 時長","One HH:MM or HH:MM:SS duration per line"],"type":"textarea","value":"08:00\n09:00\n20:00"}],"title":["多個時長相加","Duration Sum"],"engine":"duration-total","scope":["僅做持續時間相加，不計算日期、節假日或工資。","Duration arithmetic only; no dates, holidays or wages."]}