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A year ago, we used mathematics to predict the date and number of the last One Piece chapter based on Eiichiro Oda’s predictions. This week the author estimated finishing the series in 5 years, so we decided to update the numbers.

Contrary to what most people may think, Oda is relatively consistent with its predictions. Of the 7 we know, 5 estimated dates are within a year. Obviously we don’t expect to hit the exact values through math alone, but these calculations are always fun to do, so here are the results for anyone interested.

One Piece Ending Predictions

The next table lists the predictions of the end of One Piece. It includes information about the date on which they were stated, what chapter the series was in, and how many days had passed since the release of One Piece.

#
Prediction
Stated
Chapters
passed
Days
passed
Prediction 1Oda estimates that it will last 5 yearsJuly 19, 199700
Prediction 2Oda says timeskip marks 50% of the seriesAugust 30, 20105974,790
Prediction 3Oda says is 60% completeDecember 15, 20126915,628
Prediction 4Editor Suguru Sugita says is 70% completeJuly 17, 20157936,572
Prediction 5Oda says is 65% completeJuly 20, 20168326,941
Prediction 6Oda says is 80% completeJuly 21, 20189127,672
Prediction 7Oda estimates that it will last 5 yearsAugust 30, 20199538,077

One Piece Ending Based on Chapter

The next table lists information in which chapter and date One Piece will end, assuming that the predictions was based on chapters. “Real Average” includes all values, and “Tuned Average” excludes the two most distant predictions (by under and over).

#
Chapters
to finish
Days
to finish
End chapter
(chapter based)
End date
(chapter based)
Real average1,041October 20, 2021
Tuned average1,153June 1, 2024
Prediction 12381,810238July 2, 2002
Prediction 25975,1881,194November 12, 2024
Prediction 34614,0031,152December 1, 2023
Prediction 43403,1811,133March 31, 2024
Prediction 54484,1931,280January 11, 2028
Prediction 62282,1341,140May 23, 2024
Prediction 71951,8251,148August 28, 2024

One Piece Ending Based on Date

The next table lists information in which chapter and date One Piece will end, assuming that the predictions was based on date. “Real Average” includes all values, and “Tuned Average” excludes the two most distant predictions (by under and over).

#
Chapters
to finisht
Days
to finish
End chapter
(date based)
End date
(date based)
Real average1,014February 24, 2021
Tuned average1,126September 29, 2023
Prediction 12401,826240July 19, 2002
Prediction 25514,7901,148October 11, 2023
Prediction 34323,7521,123March 25, 2023
Prediction 43012,8171,094April 2, 2023
Prediction 53993,7371,231October 13, 2026
Prediction 62051,9181,117October 21, 2023
Prediction 71951,8271,148August 30, 2024

Ending Chapter Predictions

The next chart shows the final chapter of One Piece based on each prediction.

Ending Date Predictions

The next chart shows the date on which One Piece ends based on each prediction.

One Piece Ending Average

The next table lists information in which chapter and date One Piece will end, calculated by averaging the estimations by date and chapters. “Real Average” includes all values, and “Tuned Average” excludes the two most distant predictions (by under and over).

#
End chapter
(average)
End date
(average)
Real average1,028June 23, 2021
Tuned average1,140January 30, 2024
Prediction 1239July 10, 2002
Prediction 21,171April 27, 2024
Prediction 31,137July 28, 2023
Prediction 41,113October 1, 2023
Prediction 51,256May 29, 2027
Prediction 61,128February 5, 2024
Prediction 71,148August 29, 2024

Conclusion

Taking into account the data presented by the observed predictions, and excluding the two most distant predictions, it is estimated that One Piece will end on Monday, February 5, 2024 at chapter 1,140.

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