Boat 2 wins on corrected time
| Place | Boat | PY | Elapsed | Corrected |
|---|---|---|---|---|
| 1 | Boat 2 | 1390 | 49:12 | 35:24 |
| 2 | Boat 1 | 1100 | 41:30 | 37:44 |
| 3 | Boat 3 | 1037 | 40:05 | 38:39 |
| - | Boat 4 | 1235 | DNF | - |
The RYA's current national list, as we last read it: Portsmouth Number List 2026. Checked against the RYA on 30 October 2026. Use your club's own numbers where it sets them.
We don't save what you type: it lives in the link in your address bar, so you can share it.
Put the calculator on your club's website
Paste this where your site takes HTML. The calculator runs in the box; the credit link must stay.
<iframe src="https://stillandwake.co.uk/embed/portsmouth-yardstick-calculator" title="Portsmouth Yardstick calculator" width="100%" height="820" style="border:0;max-width:760px" loading="lazy"></iframe> <p><a href="https://stillandwake.co.uk/portsmouth-yardstick-calculator">Free Portsmouth Yardstick calculator</a> from Still & Wake</p>
How to use it
Put one boat on each line: a name or sail number, its Portsmouth Number, and its elapsed time, separated by commas. Times can be 41:30 or 1:02:03. A boat with no time gets a code instead, such as DNF or DNS, and is listed after the finishers.
The results update as you type. The setup lives in the link, so the race officer can send it round the club.
How it is worked out
Corrected time is elapsed time times 1,000, divided by the Portsmouth Number. A boat on 1390 that takes 46:20 has a corrected time of 33:20. The boat with the shortest corrected time wins.
We round corrected times to the whole second before ranking; tick the box to keep the fractions. Boats on equal corrected times share the place. Both are our rules, so use your club's sailing instructions if they differ.
Whose numbers?
The tool holds no numbers. The RYA publishes a national list each year as a starting point, and it says handicaps are set by clubs to suit local conditions. So type the numbers your club uses. Under the tool we show which RYA list is current, as we last checked it.
For clubs
The calculator can sit on your club's own website: the code to copy is under the tool. If you run a passage race, the sailing time calculator may help with the plan.
Sources
- RYA, Portsmouth Yardstick, read 30 October 2026
- Wikipedia, Portsmouth Yardstick: corrected time = elapsed time x 1000 / Portsmouth Number for UK numbers, read 30 October 2026
Craig Fearn runs Still & Wake. He writes the guides and journal.