Lap vs split time
A lap is the time between two lap presses. A split is the total elapsed time since you started the stopwatch.
If you press Lap repeatedly, each lap measures your time for that segment only (lap time). This is useful for comparing performance across segments.
Split time is cumulative: it keeps increasing from the moment you press Start. Use splits to track progress toward a target total time.
In training and racing, laps help compare segment performance while splits show overall progress. Most professional timing systems display both.
- Lap 1: 0:30.00 (Split 0:30.00)
- Lap 2: 0:29.50 (Split 0:59.50)
- Lap 3: 0:31.00 (Split 1:30.50)
Try it: Lap vs Split times
Lap = segment time. Split = total time since start.
Fastest, slowest, average lap
Once you have laps, you can compute summary statistics to understand consistency and pacing.
Fastest lap = minimum lap duration. Slowest lap = maximum lap duration. The gap between them shows your variability.
Average lap = total lap time divided by number of laps. Compare individual laps to the average to spot outliers.
If your slowest lap is much larger than average, you may have had a rest, a pacing drop, or an obstacle. Use this insight to improve.
- Laps: 30.0s, 29.5s, 31.0s, 30.2s
- Fastest: 29.5s
- Slowest: 31.0s
- Average: 30.2s
- Slowest is 1.5s above fastest — 5% variability
Try it: Compare laps
Fastest/slowest show variability; average shows typical pace.
Settings explained
Customize precision, sounds, and auto-lap behavior to match your timing needs.
Precision: Choose 1ms, 10ms, or 100ms display. Higher precision (1ms) is useful for speed runs; lower precision (100ms) is cleaner for workouts.
Sounds: Enable audio feedback for Start, Lap, and Reset. Helpful when you can't watch the screen (e.g., during a run).
Auto-lap on pause: When enabled, pausing the stopwatch automatically records the current segment as a lap. Perfect for interval training where you pause between sets.
- 1. Enable "Auto-lap on pause"
- 2. Start → exercise → Pause (lap recorded)
- 3. Rest → Resume → exercise → Pause (lap recorded)
- 4. Review all work intervals with rest excluded
Try it: Experiment with settings
Auto-lap on pause captures work intervals automatically.
Use cases
A versatile stopwatch supports many timing scenarios beyond just running laps.
Running/cycling intervals: Track each lap around a track, or each interval in a HIIT session. Compare pacing consistency.
Workout sets: Time each exercise set. Use auto-lap on pause to capture work periods while ignoring rest.
Speed runs/gaming: Record segment times for game levels or challenges. Identify your slowest segment to improve.
Cooking/lab timing: Time each step in a recipe or experiment. Export the session as a reference.
Presentations/meetings: Time each agenda item or speaker. Keep sessions on track.
- 30s work → Pause → 15s rest → Resume
- 30s work → Pause → 15s rest → Resume
- Result: 4 laps of ~30s (work periods)
Try it: Simulate intervals
From athletics to cooking, lap timing brings structure.
Export and save sessions
For workouts and time trials, exporting your lap table is useful for logs and sharing.
Use PDF export to download a clean summary and lap table for your training log.
Use Save/History to store sessions and revisit them later in the same browser. Sessions are stored locally — no account needed.
Saved sessions include all laps, stats, and your settings at the time of saving.
- Save: "Morning intervals 2026-02-07"
- Export PDF for coach or training log
- History: Compare today vs last week
Related: Time Duration
Export PDFs for sharing; save sessions for later reference.