How Many Courts Do You Need? Tournament Scheduling Math Made Simple

The most common way tournaments go wrong has nothing to do with the draw. It is time: too many matches, too few courts, and a final being played in the dark by two exhausted pairs while everyone else has gone home.

A little arithmetic before you open registration prevents all of it.

Step 1: count your matches

Every format has a fixed match count you can work out in advance:

Round robin: a group of n teams plays n × (n − 1) ÷ 2 matches. A group of 6 = 15 matches. Two groups of 4 = 12 matches.
Single-elimination knockout: always n − 1 matches for n teams (every team except the champion loses exactly once). 16 teams = 15 matches. Add one for a third-place playoff.
Groups + knockout: add the two together. Two groups of 4 with semis and a final = 12 + 3 = 15 matches.

Step 2: estimate match length

Use realistic averages for your sport and format, including the changeover: a short-format padel or pickleball match might run 25–30 minutes; a best-of-three volleyball match 60–75; a football group match with a break, 40–50. When in doubt, time a friendly and round up.

Step 3: the only formula you need

Total hours = (matches × average match length) ÷ courts.

Worked example: 16 pairs, two groups of 8 round robin (2 × 28 = 56 matches) at 25 minutes each is 1,400 minutes of play. On 4 courts that is roughly 6 hours before you even reach a knockout — probably a two-day event, or a case for smaller groups.

Reverse it to size your field: with 3 courts for 5 hours at 30 minutes a match, you have room for about 30 matches — perfect for eight teams of round robin (28) plus a final.

Step 4: build in buffers

Plan to use about 85–90% of theoretical capacity — injuries, deciders and late arrivals eat the rest.
Never schedule a team for back-to-back matches without a rest slot.
Put the tightest rounds early in the day, not before the final.

Let the schedule build itself

Doing this on paper for one group is fine; doing it for four divisions across six courts is not a job for a spreadsheet. ScorePal generates fixtures and schedules automatically for round robins, groups and brackets, assigns courts and times, and republishes instantly when results come in — so the math above happens in seconds, not evenings.