Stopwatch

Counts up to the hundredth of a second, with laps. Space starts and stops, L takes a lap.

Ready

Picture

Hundredths

The pie turns once a minute, like a seconds hand. Hiding hundredths calms the display; the laps keep them.

00:00.00

10 blocks · 1 block = 1 minute · fills up

Lap sound

Keys: Space start/stop · L lap · R reset · F full screen

Laps

Press Lap (or L) while it runs. Each lap shows its own time and the running total; the fastest and slowest are marked.

    Kept in this browser. Closing the tab does not stop the count.

    Keys: Space start/stop · L lap · R reset · F full screen

    How to use the stopwatch

    1. Press Start (or the space bar). The time counts up.
    2. Press Lap (or L) at each split. The lap list shows that lap’s time and the total so far, newest first.
    3. Press Stop to pause, Resume to carry on, and Reset (or R) to clear the time and the laps.

    Good for

    • Running, swimming and cycling splits
    • Timing a speech, a talk or a reading
    • Lab work and science lessons
    • Speed-cubing, puzzles and games
    • How long a task really takes
    • Rest between sets when you do not want a fixed time

    Reading the board

    Each block is one minute, and the block you are in fills up as its seconds pass; a new row of ten appears every ten minutes. After an hour each block becomes five minutes, and the caption under the blocks always says which. Under View, the pie turns once a minute like a seconds hand.

    Questions and answers

    How exact is it?

    It works out the time from your device clock and the moment you pressed Start, so it does not drift in a background tab. The hundredths are there for reading splits; a finger on a button is usually the bigger error.

    Does it keep counting if I close the tab?

    It keeps the moment you pressed Start and your laps in this browser. Nothing runs while the tab is closed, but when you open the page again it shows the time since Start, as a stopwatch would. Nothing is sent to us. Reset clears it.

    Can I copy or save my laps?

    Yes. Open the ⋯ menu on the lap list and choose “Copy laps as text” or “Download as CSV”. The CSV file is made in your browser and opens in any spreadsheet.

    How are the fastest and slowest laps marked?

    With the words FASTEST and SLOWEST on the lap rows, once you have two laps or more, so you do not have to tell colours apart. The bar in each row shows the lap’s length against the slowest lap.

    Can I run two stopwatches?

    Not at once in the same browser: every TimerNook tab in a browser shares one saved stopwatch, so a second tab shows the same count. For a second one, use another browser.

    Other timers

    Created by Saad Danish. Checked start, stop, laps, saving across a reload, CSV and full screen on this page before release.
    Last updated 10 November 2026.