Berechnung eines relativen Wechselkurses (gewichteter Mittelwert) in Excel

Denke den ein oder anderen Euroabhängigen in Thailand könnte dieses Problem auch interessieren.

Ziel ist es einen durchschnittlichen Wechselkurs zu berechnen. Dies kann man natürlich einfach machen: man hat fünf Wechselkurse, nimmt die Summe davon und dividiert sie durch 5 bzw. mit der Formel

=MITTELWERT(A1:A5)

Nur ist es oft so, dass man nicht immer die selbe Summe wechselt oder vom ATM abhebt. Also sollte der Wechselkurs von 15000 abgehobenen Baht gewichtiger sein als der von nur 5000 Baht. Wahrscheinlich gibt es mehrere Wege die ans Ziel führen, ich habe folgenden genommen. Zunächst ein Screenshot der Eingabefelder. Wieviel Prozent der jeweilige Wechselbetrag vom Gesamtbetrag ausmacht ist ganz einfach zu berechnen (nicht zu vergessen mit “Prozent” zu formatieren, wobei es für die Berechnung aber unrelevant ist)

=A2/$A$7 ;und dann einfach runterziehen…
=A3/$A$7 ;
=A4/$A$7 ;usw…

Excel-gewichteter-mittelwert1 in Berechnung eines relativen Wechselkurses (gewichteter Mittelwert) in Excel

Die Formel für das Ergebnis sieht dann so aus:

=SUMMENPRODUKT(C2:C6;D2:D6)/SUMME(D2:D6)

In diesem Fall ist es übrigens nicht notwendig noch einmal durch die Summe der Prozente zu dividieren, also /SUMME(D2:D6), da die ohnehin 100%, also 1 ergibt. Relevant aber wenn man nur die Daten aus z.B. den Zeilen 3 bis 6 nimmt, da man somit nicht 100% in Summe hat.

Zum Vergleich darunter in C11 der Wechselkurs wenn man einen einfachen Mittelwert genommen hat. Dabei würden eben z.B. die 50 Baht/Euro aus Zelle C4 zu stark gewichtet werden.

Excel-gewichteter-mittelwert2 in Berechnung eines relativen Wechselkurses (gewichteter Mittelwert) in Excel

01
prinzregent
June 23rd, 2010 18:02

Deutsche Denken Zuviel. Thais sind flexibler. Das geht so: Wenn der Deutsche kein Geld mehr hat nimm einfach einen Inder :shock: :razz: Schon passt das wieder mit dem Geld :mrgreen:

02
January 21st, 2011 07:05

So ganz verstanden habe ich es jetzt nicht wirklich, und vor allem was nützt mir das wenn ich Geld wechseln muss, bekomme ich dann mehr wenn ich mir vorher was ausrechne :?:

03
admin
January 21st, 2011 23:40

Hallo Jan, prinzipiell geht es darum:

Ich wechsle einmal 10.000€ zu einem Kurs von 50
Dann wechsle ich noch 100€ zu einem Kurs von 40

Die 10.100€ die ich gewechselt habe, haben dann insgesamt eben keinen Durchschnittskurs von 45, sondern glücklicherweise 49,9…

Somit kann man sich ausrechnen, welchen “persönlichen” Kurs man wirklich über einen längeren Zeitraum hat – natürlich relativ gesehen zu dem Euro-Betrag den man zu einem bestimmten Kurs gewechselt hat.

Der Prinz hat natürlich auch recht :mrgreen: :cool:

Und ich schau mir jetzt Deine Website http://www.thailand-neuheiten.de/ an. Ist schön mal wieder in aktuellen Blogs über Thailand zu lesen ;-)

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