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How to count number of leap years between two dates in Excel?

In Excel, to count the number of years between two given dates may be easy for most of users, but, can you only count the number of leap years also called intercalary year between two dates? Here I introduce a formula can help you to quickly calculate the number of leap years between a date range in Excel.

Count leap years in a date range with formula

arrow blue right bubble Count leap years in a date range with formula

To count leap years between two dates, you just need to do as this:

Select a blank cell that you will place the counted result at, C2 for instance, and enter this formula
=DATE(YEAR(B2),1,1)-DATE(YEAR(A2),1,1)-((YEAR(B2)-YEAR(A2))*365)+AND(MONTH(DATE(YEAR(A2),2,29))=2,MONTH(DATE(YEAR(B2),2,29))=2)*1
then press Enter key to get the result. See screenshot:
doc count leap year 1

Tip: In the formula, A2 is the start date and B2 is the end date, you can change them as you need.

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Comments (4)
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Tom Moore
Tom Moore
This comment was minimized by the moderator on the site
A more useful function would be to calculate the number of times Feb 29 occurs between 2 dates.
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acbcravo@gmail.com
This comment was minimized by the moderator on the site
Tentei a fórmula acima, mas ainda gerava erro no numero de anos bissextos, então fiz uma função em VBA que faz a verificação ano a ano no intervalo.
Após incluir esta macro abaixo, para utilizar use a função =ContBissexto(A1;B1), o resultado é a quantidade de anos bissextos no período: Espero ter ajudado:

Function ContBissexto(Ini As Date, Fim As Date) As Integer
On Error Resume Next

Dim AnoIni As Integer
Dim AnoFim As Integer
Dim contB As Integer
contB = 0
'DEFINE O ANO DE INICIO DA CONTAGEM DO PERÍODO BISEXTO
If Ini <= DateSerial(Year(Ini), 3, 1) - 1 Then
AnoIni = Year(Ini)
Else
AnoIni = Year(Ini) + 1
End If
'DEFINE O ANO DE FIM DA CONTAGEM DO PERÍODO BISEXTO
If Fim > DateSerial(Year(Fim), 2, 28) Then
AnoFim = Year(Fim)
Else
AnoIni = Year(Fim) - 1
End If

For i = AnoIni To AnoFim
If Day(DateSerial(i, 3, 1) - 1) = 29 Then contB = contB + 1
Next

ContBissexto = contB

End Function
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Antônio Cravo
Antônio Cravo
This comment was minimized by the moderator on the site
A contagem gerava erro no numero de anos bissextos, então fiz uma função em VBA que faz a verificação ano a ano no intervalo.
Após incluir esta macro abaixo, para utilizar use a função =ContBissexto(A1;B1), o resultado é a quantidade de anos bissextos no período:


Function ContBissexto(Ini As Date, Fim As Date) As Integer
On Error Resume Next

Dim AnoIni As Integer
Dim AnoFim As Integer
Dim contB As Integer
contB = 0
'DEFINE O ANO DE INICIO DA CONTAGEM DO PERÍODO BISSEXTO
If Ini <= DateSerial(Year(Ini), 3, 1) - 1 Then
AnoIni = Year(Ini)
Else
AnoIni = Year(Ini) + 1
End If
'DEFINE O ANO DE FIM DA CONTAGEM DO PERÍODO BISSEXTO
If Fim > DateSerial(Year(Fim), 2, 28) Then
AnoFim = Year(Fim)
Else
AnoIni = Year(Fim) - 1
End If

For i = AnoIni To AnoFim
If Day(DateSerial(i, 3, 1) - 1) = 29 Then contB = contB + 1
Next

ContBissexto = contB

End Function
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Fabian Ries
Fabian Ries
This comment was minimized by the moderator on the site
Oi amigo,

Excelente fórmula!

Trabalhei com ela e percebi que há uma divergência quando o primeiro e/ou o segundo intervalo são anos bissextos. Tomei a liberdade de corrigir (em português):


=DATA(ANO(B2);1;1)-DATA(ANO(A2);1;1)-((ANO(B2)-ANO(A2))*365)+E(ANO(A2)=ANO(B2);MÊS(DATA(ANO(A2);2;29))=2;A2<=DATA(ANO(A2);2;29);B2>=DATA(ANO(B2);2;29))+E(ANO(A2)
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