Coaching and track
A coach's stopwatch should store many laps and splits, have a large display and big buttons you can press without looking, and survive being dropped and rained on.
- 1/100 s resolution
- Lap and split memory you can recall after the event
- Water resistance and a strong lanyard
- A start/stop button you can find by feel
Swimming
Poolside means wet hands and splashing. Look for a water-resistant case, a split memory large enough for a whole meet, and a display that reads in bright sun.
- Water-resistant rating suited to poolside use
- Split memory for many swimmers or laps
- High-contrast display
Multiple runners
Some stopwatches record several runners' finishes from one common start — useful for cross-country and school sports.
- Multi-runner or bib memory
- One start, many stops
- Recall in finish order
Time study
Industrial engineers use decimal-minute or decimal-hour stopwatches so readings can be added and averaged directly.
- Decimal-minute (0.01 min) or decimal-hour display
- Snapback and continuous modes
- A clipboard or board mount
Kids and classrooms
Simple, sturdy and loud: two or three buttons, a big display and a beep. Classroom packs keep a set for group activities.
- Few buttons
- Large digits
- Packs of several for group work
Lab and kitchen timers
A dual or triple timer runs several countdowns at once — handy in a lab, a darkroom or a busy kitchen.
- Several independent channels
- Loud alarm
- Magnet or stand
Resolution isn't accuracy
Almost every digital stopwatch shows hundredths. What separates a good one is the crystal's stability over a long event, how many laps it can remember, and whether you can press the right button reliably with cold or wet hands. For anything timed by hand, the tenths are the honest digit — see how accurate is a stopwatch.