Inputting logs into Excel

T

The Red Cardinal

Hi,

I need to enter the following formula into an excel spreadsheet:

n = (-log(1-iA/P)) / log(1+i)

It seems I can use any base for the log as long as both are the same. The
variables all refer to cells and are referenced in the sheet.

Can anybody help me please?

Thanks in advance.
 
O

Orlando Magalhães Filho

Hi,

If iA is on A1 cell, P is on A2 cell, i is on A3 cell and n is on A4 cell
then insert on A4 cell this formula:
= (-LOG(1-A1/A2,10))/LOG(1+A3,10)
or
= (-LOG(1-A1/A2))/LOG(1+A3)

HTH
 
T

The Red Cardinal

Orlando said:
Hi,

If iA is on A1 cell, P is on A2 cell, i is on A3 cell and n is on A4
cell then insert on A4 cell this formula:
= (-LOG(1-A1/A2,10))/LOG(1+A3,10)
or
= (-LOG(1-A1/A2))/LOG(1+A3)

HTH

---
Orlando Magalhães Filho

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Cheers - worked a treat.
 
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