Free tools
Run your ladder through the numbers before you run it for real
You have a player count in your head, a court booking you had to fight for, and a season that has to end before the weather does. What the spreadsheet cannot tell you is whether those three things fit together, and that is the one question worth answering before you send a single invite.
Put in five numbers. What comes back is the match volume to expect and how many of those matches your average player actually gets. It also tells you whether your group clears the ten-player floor, and which of your constraints runs out before the others do.
It runs in the page. No account, no email, nothing held back behind a form. The arithmetic happens in your browser, so the numbers you type are not sent anywhere, because there is no request to send.
Treat that as permanent. It is not a launch-period offer that gets tightened once traffic arrives, and there will never be an email gate on this tool, on its results, or on the spreadsheet template further down, in the same way there will never be a login in front of a standings page. If you have JavaScript switched off, the input panel renders as a plain description, the worked example below still gives you real numbers, and both template downloads still work.
Your courts can hold more matches than your players are likely to produce. Participation is the binding constraint, so two more names you can vouch for do more for this ladder than another court would.
Jump to
- The five inputs
- What it gives you back
- A worked example
- Where a ladder stalls
- The model, and what it assumes
- What the model cannot do
- Doubles, and level bands
- The free spreadsheet template
- If the numbers came back bad
- Acting on the binding constraint
The five inputs
Five fields, none of which ask who you are or where you play. We could not tell you who has used this tool today and we have deliberately built it so that stays true.
| Input | What to enter | Notes |
|---|---|---|
| Players | The number of people you can name, not the number you hope for | Ten is the floor. The tool says so plainly below ten |
| Courts available | Courts you can actually book for ladder play, per session | Shared courts count as a fraction. Enter 1 for one court you get half the time |
| Weeks | 6, 8, 10, or 12 | These are the four season lengths a Deuce ladder runs. Longer is not better |
| Match format | One of the six accepted formats | Format sets the court time each match consumes, which is usually the binding constraint |
| Sessions per week | How many separate time blocks your courts are available for ladder play | A club with Tuesday evenings and Saturday mornings enters 2 |
The format list is fixed, because a scoreline outside it cannot be recorded under the rules and the scoring whitelist:
- Best of three tiebreak sets
- Best of three, third set as a match tiebreak to 10
- One set with a tiebreak at 6-6
- Eight-game pro set
- Short sets to four, tiebreak at 3-3
- FAST4
No-ad scoring is an option inside a format, not a seventh format. It shortens the slot estimate, and the tool accounts for it with a checkbox.
Those five are the whole input. Everything below is what gets done with them.
What it gives you back
Four numbers and one sentence. The sentence is the useful part.
Expected played matches for the season. A range, not a single figure, because participation is the one input nobody can know in advance. The range moves when you move the participation assumption.
Matches per player. The median player, plus the spread between the busiest and the quietest quartile. A ladder can report sixty matches and still be a failure if forty of them belong to six people. Two matches in ten weeks is what the median player remembers when you ask them to sign up again, and the total is what an organizer looks at instead.
Court capacity against match demand. The matches your court time can hold, next to the matches your ladder wants to produce. One of those two numbers is smaller. Which one it is changes what you should do next.
Whether your group is big enough. Ten nameable players is the floor for launching a ladder on Deuce. Twelve is where the same two people stop playing each other every week. The tool reports which side of both lines you are on and does not soften it.
Below the floor it stops projecting altogether and says this instead, which is the most useful thing this page does for the reader it applies to:
Nine players or fewer is below the floor.
A ladder this size runs out of legal opponents inside a month. The player on rung 1 has nobody to challenge, the player on rung 9 has already played everyone in range, and the rematch cooldown closes what is left.
This is not a paywall and there is nothing to buy. It is arithmetic, and the fix is two more people. We will help you find them.
And one sentence naming the constraint that binds first. Courts, players, weeks, or format. It is the only output most organizers act on, so it is written as a sentence instead of a metric. It reads like this: your court time holds fewer matches than your players want, and the format is what to change first. Four constraints, four versions of that sentence, one shown at a time.
A worked example
The tool opens with a scenario already filled in, so you are never staring at an empty form. It is 16 players, 2 courts, 8 weeks, one tiebreak set, and 2 sessions a week. Follow the arithmetic through and the tool stops being a black box.
The supply side is exact, because it is multiplication. Two courts across two sessions a week is four slots. Over eight weeks that is 32 slots, and at one match per slot your season can physically hold 32 matches. Split across 16 players, a fully used season gives the median player four matches.
Then there is the other side, which nobody can multiply. Sixteen players will not all send a challenge every week. The participation split in the assumptions below is this tool's guess at how they divide up, and that guess is the reason the output arrives as a range instead of a number.
In this scenario the two sides land close enough together that participation decides the outcome, not courts. Add ten players to the same court booking and courts become the binding constraint instead. Take four players away and you are approaching the floor. The point of the tool is finding out which of those you are before you book anything or ask anybody.
Where a ladder stalls
This is the diagnostic half of the tool, and it is the part organizers come back for.
Four stalls you can see in the inputs before a single match is played, and one you cannot. The tool names which of the four you are heading for.
Court time runs out. Your ladder wants more matches than your slots can hold. This is the club with thirty enthusiastic members and one floodlit hour on a Tuesday. The fix is a shorter format, not fewer players. Moving from best of three to one tiebreak set roughly halves the court time per match.
The top of the ladder runs out of targets. Challenges go upward only, within five rungs, five by default. Rung 1 cannot challenge anybody. Rung 2 has one option. In a ten-player ladder the top three depend entirely on being challenged, and if the bottom half is quiet, the top half plays nothing. The tool flags this as challenge congestion, and it is the stall organizers never see coming.
The capped range is not a Deuce invention, which is worth knowing before you decide the cap is the problem. It is effectively universal in published club rulesets, and an uncapped ladder is a design that clubs tried and rejected.
Quiet players clog it. The stall the tool cannot see, and the one the largest ladder software vendor puts first in its own organizer guide:
95% of the reason ladders fail is because stale players are allowed to stay in and take up spots.
Source: TennisRungs, "10 Mistakes to Avoid When Running a Tennis Ladder," checked July 2026. The percentage is the vendor's own figure with no published method behind it. The definition is the part that matters: a stale player is one who never responds to or issues challenges.
That is why the model carries a participation split rather than assuming everybody plays, and why inactivity decay exists in the ruleset at all. The simulator can show you the shape of the problem. It cannot tell you which four of your names will go quiet.
Legal opponents run out. The rematch cooldown is a fixed number of days between meetings of the same two players, and playing somebody else does not shorten it. In a small ladder that is a real ceiling. The tool counts distinct legal opponents per player per week and reports the week the count crosses one.
The season outlasts the interest. Twelve weeks is the longest season a Deuce ladder runs, on purpose. A season long enough that the standings stop mattering by the halfway point produces matches for six weeks and a dead page for the rest.
How challenges, deadlines, and decay actually work
The model, and what it assumes
Every assumption below is listed and every one of them is editable. Change one and the result moves in front of you while you watch. A planning tool that hides its assumptions is a guess with a chart on it.
| Assumption | Default | Why |
|---|---|---|
| Participation split | A third regular, a third occasional, a third who play nothing | Matches how club ladders behave in published organizer accounts. A starting point, not a measurement. These are modeling buckets and not the five player statuses in the ruleset |
| Challenges per regular player | One per week | A regular player who sends more than one open challenge at a time hits the open-challenge limit |
| Acceptance rate | 70 percent | The rest decline for a stated reason or let the 48-hour window expire |
| Walkover rate | 10 percent of accepted challenges | Walkovers move rungs but are not played matches, so they are excluded from the match-volume figure |
| Court slot per match | 90 minutes best of three, 75 with a match tiebreak, 60 pro set, 45 one tiebreak set, 45 FAST4, 40 short sets | Editable. These are planning defaults, not measured times |
| Matches per court slot | One | A club that turns courts over inside a session should raise this |
| Weather and cancellation loss | 0 percent | Set it yourself. Only you know your climate and your indoor access |
| Rematch cooldown | 14 days | The platform default. Raise it and distinct-opponent supply tightens |
| Absence | Up to 21 days per absence | Players remove themselves from challenge range for that period |
One row in that table deserves more than a cell. The court slot minutes are the only numbers on this page with no source behind them. Nobody timed 90 minutes for a best of three or 45 for a FAST4. They are planning estimates, picked to be plausible for a club diary, and they are the first thing you should overwrite with what your own courts actually run at. If your Tuesday slot is 60 minutes and players are off court at 55, use 55. Every downstream number moves with it, which is the point of making the row editable.
The other timing numbers are not estimates. The response window is 48 hours and the play window is ten days, and both come from the ruleset rather than from this page. That combination is also roughly where still-operating club ladders have landed independently of each other.
The arithmetic is deliberately simple. Matches wanted is the participation-weighted challenge rate multiplied by the acceptance rate across the season. Matches possible is courts multiplied by sessions multiplied by weeks multiplied by matches per slot. The projection is the smaller of the two, with distinct-opponent supply applied as a third ceiling.
You could rebuild that in a spreadsheet in an afternoon, and some organizers have. The reason to use this instead is that the constraints are already wired together and the ten-player floor is already in it.
What the model cannot do
A planning tool is only worth trusting if it tells you where it stops working, so here is where this one stops.
It cannot tell you whether ten people will say yes. That is the question that decides whether your ladder works, and no calculator has ever answered it. What fills a ladder is somebody asking people directly, one at a time, and all this tool can do is tell you roughly how many of those conversations you are looking at.
It has no Deuce data behind it, because Deuce is pre-launch. The participation defaults come from published club ladder rulesets and from organizers describing their own ladders in public. They are not measured from Deuce seasons, because there are none. When real seasons exist, the defaults get re-based against them and the change is recorded in the changelog.
The participation split is the weakest number in the model, and every output depends on it. A third regular, a third occasional, a third who play nothing is a judgment call. It is informed by how organizers describe their own ladders, and by the fact that the biggest vendor in this category puts stale players at the top of its own list of reasons ladders fail, but nobody has measured it. That is exactly why it sits at the top of an editable table rather than inside the code, and why the honest first move with this tool is to change it to what your club actually looks like and watch the range move.
It also treats your players as a distribution instead of as people, which is a polite way of saying it does not know them. Your two strongest might play every week. Your club captain might play nothing all season and still be at every social. A model that averages those two is wrong about both of them, and the spread figure exists mostly to keep reminding you of that.
It does not model your standings order. A badly seeded ladder produces a month of mismatches, and that cost does not appear anywhere in these numbers. How to seed one.
And the output is a range, which means it should be read as one. If the range spans a decision, sitting on either side of the thing you are trying to choose, then a calculator is not what will settle it for you.
Doubles, and level bands
Two things that change what you type in, and neither of them is a sixth field.
For doubles, enter pairs rather than people. On Deuce a pair is the entity that holds a rung, so a ladder of twelve pairs is twelve entries in the tool and not twenty four. Court slot per match stays the same, because a doubles match occupies a court exactly like a singles match does. There is one limitation to plan around. At launch a pair is fixed for the season, so partners climb and fall together and you cannot swap one out in week five when your partner's shoulder goes. Rotating partners is on the roadmap rather than in the product, and if your group needs it, the tool will cheerfully model a ladder you should not run. The doubles rules.
Level bands are not an input either, and the tool does not design them. What it does is tell you when your player count and your court time suggest splitting, and then you run it again with the band's numbers instead of the whole ladder's. Two bands of fifteen are two separate simulations. Nobody but you knows what your club's level 3 means, and a tool that guessed at band boundaries would be guessing at the most local judgment in the whole setup.
The free spreadsheet template
If you have read this far and decided you are keeping the spreadsheet, that is a legitimate answer and this section is for you.
If you are going to run this on a spreadsheet anyway, run it on one that works. This is the sheet we would hand you, and it is free with no email required.
Download the .xlsx Copy the Google Sheet
Five tabs:
| Tab | What it does |
|---|---|
| Read me | How to run the sheet, in one screen |
| Players | Names, level, join date, status, and the current rung |
| Match log | One row per match: date, challenger, challenged, format, scoreline, result |
| Standings | Calculated from the match log, not typed. Rungs move by positional swap |
| Rules | The ruleset text with your values in it, ready to paste into a club email |
Two things you should know before you rely on it.
It will break, and not because the formulas are bad. It breaks in week five, when somebody has ignored a challenge for nine days and the sheet has no opinion about that, so the opinion has to be yours. It cannot tell you who went quiet, and it will not notice two friends trading wins back and forth either. All of that is a person's job, and the person is you. That is what the organizer page is about.
And it is a real gift. Nothing gates it, there is no tracking pixel inside the file and nobody gets added to a sequence of emails for downloading it. If the sheet turns out to be all you ever need from us, that is a fine outcome.
The sheet carries its own version number and date on the Read me tab, so you can tell whether the copy sitting in your downloads folder is still the current one. It was last revised in July 2026.
If you run a club site, a county association page, or a coaching business, you can put this tool on it. There is an embeddable version with a copy-paste snippet in the download block, no site navigation around it and one link back here. An organizer who gets the arithmetic on your page rather than ours is still an organizer who got the arithmetic.
If the numbers came back bad
Most organizers who run this get an answer they did not want, at least on the first attempt. There are four routes out of it and only one of them involves us.
Recruit and come back. This is the most common one and it is not a consolation prize. Eight names becomes twelve with two conversations at the end of a Saturday session, and twelve is where a ladder stops being the same two people every week.
Shorten the season instead of the ladder. Six weeks with a full field beats twelve weeks where the last five produce three matches and a standings page nobody opens. Change the weeks field and watch what happens to matches per player.
Cost is not one of the four routes, because none of them costs anything. This tool is free, the template is free, and browsing the ladders that already exist is free and needs no account. What an organizer eventually pays for a season is not set yet and it goes on the pricing page rather than into a conversation with somebody.
Run a box league this season and a ladder next season. If your court time is tight and your group is small, a format where every match is scheduled for you will produce more tennis than a ladder that runs out of legal opponents in week three. We would rather tell you that than sell you a season. The honest comparison.
Or park it. Nothing here expires and the arithmetic will be exactly the same in March, so there is no cost to walking away and thinking about it. See what other ladders look like in the meantime.
Acting on the binding constraint
The section above is for a bad result. This one is for the sentence the tool gives you, whichever of the four it turns out to be.
Courts are the constraint. Shorten the format before you shrink the ladder. Moving to one tiebreak set or FAST4 fits two matches into a slot that held one. Both are accepted formats and both record normally.
Players are the constraint. You need more names, not more software. Ask the Saturday morning group, the social hitters, and the parents standing around at junior lessons. Twelve committed players beats a hundred on a list.
The top of the ladder is the constraint. Split into level bands. Two bands of fifteen produce more played matches than one ladder of thirty, because your strongest player stops being unreachable and your weakest one stops being a formality. Every match inside a band is worth turning up for.
Everything fits. Then the number to hold onto is matches per player for the median player, and the test is whether that number would be enough to make you sign up for a second season yourself. If it would, go ahead and launch.
Start a ladder What organizers get What it will cost See ladders that already exist
Still deciding between a ladder, a box league, and a flex league: the honest comparison. For everything else, the FAQ. If you are running this for a club committee instead of a group of friends, the clubs page.
The assumptions on this page were set in July 2026 and the rule values in them come from the published ruleset rather than from this tool. Both get reviewed on the quarterly content pass, and the defaults get re-based against real seasons once real seasons exist.