Enter any past date & time to see exactly how long it’s been.
How the Time Since Event Calculator Helps You
Tracking how much time has passed since a key moment can be surprisingly powerful. Whether you’re counting the days since you launched a business, the hours since your last coffee, or the seconds since a server went down, precise elapsed-time data gives you clarity and control.
Top Benefits
- Instant Precision: Enter a date/time once and get exact years, months, days, hours, minutes, and seconds.
- Flexible Views: Switch between “Auto” (human-friendly) and raw totals (days, hours, minutes, or seconds).
- 100 % Responsive: Works flawlessly on phones, tablets, desktops, and even foldables.
- Zero Lag: Built with vanilla JavaScript—no heavy libraries—so the page loads in milliseconds.
- SEO Friendly: Semantic HTML5 markup and schema-optimized content help search engines understand and surface your tool.
- Privacy First: All calculations happen in your browser; no data is sent to any server.
Use Cases
- Project retrospectives: see how long a sprint has been running.
- Personal milestones: count time since graduation, wedding, or quit-smoking day.
- System monitoring: measure uptime or downtime from any log timestamp.
- Legal & compliance: verify elapsed time for SLA audits.
Bookmark this page and come back anytime you need an accurate, elegant answer to the question: “How long has it been?”