Exam Timer

Find a planned exam finish time from the entered start and duration. Select Start to run a countdown for the entered duration.

How to use Exam Timer

1. Enter Exam Duration, Start Date & Time (UTC). 2. Plain numbers mean minutes; labelled d, h, min and sec are accepted. Durations are non-negative and a duration day means 24 hours. Static answers round to seconds, with nonzero subsecond values labelled. No holiday calendar or daylight-saving adjustment is applied. Start Date & Time is UTC, not browser local time. A past finish completes immediately; this is a deadline countdown and cannot be paused. The browser runs the timer while the page remains open. Background throttling, sleeping devices and blocked sound can delay visible updates or alerts. Use Pause/Resume where shown and Reset to stop/clear it; this is not a guaranteed alarm or safety clock. 3. Select Start to start the displayed timer. Use its Pause/Resume controls where shown; Reset stops and clears it.

Why use this tool?

Use Exam Timer when you need exam finish time. Plain numbers mean minutes; labelled d, h, min and sec are accepted. Durations are non-negative and a duration day means 24 hours. Static answers round to seconds, with nonzero subsecond values labelled. No holiday calendar or daylight-saving adjustment is applied. Start Date & Time is UTC, not browser local time. A past finish completes immediately; this is a deadline countdown and cannot be paused. The browser runs the timer while the page remains open. Background throttling, sleeping devices and blocked sound can delay visible updates or alerts. Use Pause/Resume where shown and Reset to stop/clear it; this is not a guaranteed alarm or safety clock.

How the calculation works

Countdown to entered UTC start + exam duration. Plain numbers mean minutes; labelled d, h, min and sec are accepted. Durations are non-negative and a duration day means 24 hours. Static answers round to seconds, with nonzero subsecond values labelled. No holiday calendar or daylight-saving adjustment is applied. Start Date & Time is UTC, not browser local time. A past finish completes immediately; this is a deadline countdown and cannot be paused. The browser runs the timer while the page remains open. Background throttling, sleeping devices and blocked sound can delay visible updates or alerts. Use Pause/Resume where shown and Reset to stop/clear it; this is not a guaranteed alarm or safety clock. Live timer values show the current elapsed/remaining clock; the worked example describes the starting schedule.

Example

Worked example: Exam Duration = "1 min"; Start Date & Time (UTC) = "2030-01-01T00:00". Result: Exam finishes 2030-01-01T00:01:00.000Z; remaining time depends on now.

Practical tip

Check the exam input and output convention before reusing the result.