Work out puzzle solving time instantly with clear inputs, formula shown and shareable results.
Solo time is pieces divided by the placement rate; extra people multiply the rate but with a 15% per-person coordination loss, since two solvers often reach for the same piece. Jigsaw effort scales with piece count while search time grows faster, so the honest team estimate is always less than a straight division by the number of solvers.
Solo time
solo minutes = pieces / pieces per minute
Team time
team rate = rate x people / (1 + 0.15 x (people - 1)); minutes = pieces / team rate
solo minutes = pieces / pieces per minute. Solo time is pieces divided by the placement rate; extra people multiply the rate but with a 15% per-person coordination loss, since two solvers often reach for the same piece.
Jigsaw effort scales with piece count while search time grows faster, so the honest team estimate is always less than a straight division by the number of solvers.
Enter number of pieces, pieces placed per minute, people working on it. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.