Online Stopwatch with Lap Times
One session. Every split. Record your laps and see how each attempt compares.
Lap times
0 completed laps| Lap | Lap time | Split time | Label |
|---|
Make this session yours
No account neededSaved on this device · Pause to save · Up to 20 sessions
Saved sessions 0
Key takeaways
- On this page the lap table is always visible, even before your first lap.
- After two laps, the fastest and slowest laps get a badge, and the average lap appears under the table.
- Each lap can have a label of up to 240 characters, and everything goes into the CSV.
Every lap tells part of the story.
Use the lap stopwatch for repeated attempts, practice sessions or comparing task durations. Labels help you remember what each mark represents. Need to count down instead? Our sister site Online Timer sets a countdown with an alarm, also free and without an account.
- Lap time: your latest segment.At 00:12.40, record your first lap: 00:12.40.
- Split time: the whole session so far.At 00:25.10, the split is 00:25.10 and the second lap is 00:12.70. Pauses are excluded.
- Compare completed laps.After two marks, see fastest, slowest and average. Your unfinished lap stays separate.
What is in the lap CSV?
One row per completed lap, with seven columns. The unfinished lap is not included.
| Column | Example content |
|---|---|
session_name |
The name you gave the session |
lap |
1, 2, 3 … |
label |
Your label for that lap |
lap_time |
Lap time as shown, for example 00:12.70 |
split_time |
Total active time at that mark |
lap_ms |
Lap time in milliseconds, for sorting and sums |
split_ms |
Split time in milliseconds |
The file opens in Excel, Numbers and Google Sheets. Names and labels that start with =, +, - or @ get an apostrophe in front, so a spreadsheet never runs them as formulas.
Guides: How to use a stopwatchSplit times for runningHow accurate is it?Study stopwatch
A few useful answers
What is the difference between lap and split?
A lap is the active time since your last mark. A split is the total active time from the start. Marks at 00:12.40 and 00:25.10 give lap times of 00:12.40 and 00:12.70.
Does paused time count?
No. Pause freezes active time. Resume continues the same unfinished lap. Pausing never adds a completed lap.
What is included in a CSV download?
Your session name and recorded laps, with labels, lap times, split times and numeric milliseconds. Unfinished time is not added as a lap. With no recorded laps, CSV contains column headings only; Copy results includes your total time. Formula-like names and labels are prefixed with an apostrophe for spreadsheet safety.
Where are my results saved?
The active session is kept in this tab when browser storage is available. Save session keeps up to 20 paused sessions on this device. Nothing is uploaded by the app. Clearing browser data can remove your results.
Can I use fullscreen or keep the screen awake?
Choose Open Full Screen and leave with Exit Full Screen or Escape. Unsupported browsers use an expanded window view. Keep screen awake is optional and works only when the browser allows it during visible, active timing. It does not promise background or locked-screen operation.
How accurate is the stopwatch?
This is a manual timing tool, not certified competition timing. Hundredths describe the display, not the accuracy of your reaction or device. Background rendering may stop while elapsed time continues. Reloads use the system clock; sleep or clock changes can make recovery uncertain and are flagged. The maximum is 999:59:59.99.
Can I use this stopwatch offline?
After the first successful cache download, the stopwatch and these pages can work offline. Browser storage settings can prevent this. Updates wait until old app tabs have closed.
When do the fastest and slowest badges appear?
After your second completed lap. If all laps are equal, they are marked "Equal".
What if I hit 20 saved sessions?
Delete one before saving another, or export the session as CSV.