This free rowing interval timer helps you train with clear timing and sound, without an app. It runs fully in your browser, so you need no account and no sign-up, and nothing you type leaves your device. Open it on a phone, tablet or laptop where you train, and it is ready in seconds.
A rowing interval session splits work into pieces with rest between them, and each piece has a target stroke rate. This tool totals the session time, works out your pace per 500 metres from your work time and distance, and shows the stroke-rate target, so you can set the erg and row without doing maths mid-session.
Set the number of pieces, the work seconds, the rest seconds, the target strokes per minute and the distance per piece, then press the start button to see the result. The tool shows the total time and your pace per 500 metres. Use that pace as your target on the monitor, and hold the stroke rate steady through each piece.
Take a common session: 6 pieces of 500 metres, 2 minutes of work and 1 minute of rest, at 28 strokes per minute. The work totals 12 minutes, the rest totals 5 minutes, and the whole session takes 17 minutes. Knowing that total before you start helps you fit the session into a lunch break or a gym slot.
The big display matters because training is physical. When you are out of breath, tired or mid-set, small text and quiet beeps fail. This tool uses a large clock, a clear phase label and a loud beep, so you can follow it from across a room or a pool deck without stopping to read.
Tip: Set the monitor to show pace per 500 metres and stroke rate together. Watching both stops you from rating up while the pace falls.
Tip: Hold the rate in the rest too. Light paddling at a low rate keeps you loose without turning rest into extra work.
Tip: Start the first piece at target pace, not faster. A fast first piece always costs you pace in the last pieces.
Common question: What stroke rate should I use? Most interval work sits between 26 and 32 strokes per minute. Longer pieces use lower rates, and short sprints use higher rates.
Common question: Can I use it for distance pieces? Yes. Enter the distance per piece and your work time, and the tool gives the matching pace per 500 metres.
Common question: Why track pace per 500 metres? It is the standard rowing measure, so it lets you compare sessions, boats and athletes fairly.
The biggest mistake is chasing pace in the last piece. A wild final sprint ruins the comparison with last week and teaches uneven pacing.
This timer suits rowers, erg users, CrossFit athletes and coaches. It also suits gym users who want a structured rowing session instead of a random row.
On the day, charge the device the night before, open the tool early, and test the sound once before the session starts. A flat battery or a silent device in the first minute is an avoidable problem, and a one-minute test prevents it. Keep a charger nearby for long tournaments, and keep the screen bright enough to read in sunlight or under hall lights.
This tool is free to use as often as you like. Bookmark it, use it for every session, and share it with your training partners. A good timer does not make you fitter by itself, but it removes excuses, keeps sessions honest, and lets you compare this week with last week fairly.
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