Playing Time Calculator
Enter your squad size, how many are on at once, and how many periods you play. It tells you whether an even split is even possible — and if not, exactly how far off it is.
Closest possible: 8 players get 3 periods, 2 get 2.
7 × 4 = 28 slots. 28 ÷ 10 = 2 remainder 8, so 8 players must take an extra period. Rotate who that is each week.
How is playing time calculated?
That last point is the useful one. Coaches often feel they have failed when playing time is not identical, but with seven positions and a squad of nine there is no arrangement that makes it identical. The job is to keep the gap to a single period and rotate who carries it from week to week — which is a record-keeping problem, not a maths problem.
Worked example
Netball, 7 positions, 4 quarters — 28 slots. With 14 players that is exactly 2 quarters each. With 9 players it is 28 ÷ 9 = 3 remainder 1, so eight players get 3 quarters and one gets 4. With 10 players it is 2 remainder 8, so eight get 3 and two get 2.
Notice that 10 players is less even than 9. Squad size interacts with the format in ways that are not obvious, which is the reason this calculator exists — it is worth checking before you commit to a squad at the start of a season.
More periods, less unfairness
The single most effective lever is splitting the match into more blocks. Four quarters with nine netballers leaves a one-quarter gap; eight shorter rotations gives 56 slots, so everyone gets six and two players get seven — the same gap, but now it is one-eighth of the match rather than one-quarter. The cost is more substitutions to manage.
For the guidance behind the numbers, see fair playing time in junior sport and how to plan player rotations.
Common questions
How do you calculate fair playing time?
Multiply the number of positions on court by the number of periods to get the total playing slots, then divide by your squad size. If it divides exactly, everyone can have identical time. If there is a remainder, that many players get one extra period — and one period is the smallest possible gap.
Why is a squad of 10 less even than a squad of 9?
Because evenness depends on whether your squad divides the slot count, not on squad size itself. With 7 positions over 4 quarters there are 28 slots: 9 divides into 28 three times with 1 left over, while 10 divides twice with 8 left over. Eight players carrying an extra quarter is a wider spread of outcomes than one.
What is the best squad size for fair playing time?
One that divides the slot count exactly. For netball at 7 positions over 4 quarters, 14 is perfect and 7 means nobody rests. In practice you also need cover for absences, so a squad slightly above a perfect number is usually the sensible trade — just expect a one-period gap and rotate who carries it.
Should I use more periods?
It is the most effective lever you have. Doubling the number of rotation blocks halves how much of the match an unfair period represents. The cost is more substitutions to manage on the sideline, which is a real trade-off for a volunteer coach with no assistant.
Does this work for any sport?
Yes — it is just arithmetic over positions and periods, so it applies to any sport where a fixed number of players are on at once for a set number of periods. The presets cover the common NZ junior formats; you can also type your own numbers.
Build the rotation
Netball rotation generator
Work out who plays which position each quarter, with playing time spread evenly across the squad.
Football lineup generator
Build a fair lineup for each half from your squad and formation, with substitutions and playing time worked out.
Basketball lineup generator
Build a fair starting five for each quarter, with court time shared evenly across the squad.
Knowing the split is half of it.
The other half is remembering who carried the short end last week. Squaddie keeps a running playing-time total per player across the season.
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