Free online Time Ago Calculator, compute exact differences between two dates in days/hours/minutes. Also calculate how long ago a date was. | No Sign-up · Data never leaves your device
Zero Dependencies · Works OfflineEnter two dates to compute the difference, or one date to see how long ago
Updated: 2026-07-25
Please select dates
Today
Yesterday
7 Days Ago
30 Days Ago
1 Year Ago
30 Days Later
⏱️ Time Ago Calculator: calculation logic
The core calculation logic:
diffMs= endMs - startMsabsMs= Math.abs(diffMs)totalSeconds= Math.floor(absMs/1000)totalMinutes= Math.floor(totalSeconds/60)totalHours= Math.floor(totalMinutes/60)days= Math.floor(totalHours/24)
Understanding Start Date
- Start Date
- End Date (optional, leave blank for now)