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# Re: APR Formula Recreated in Airtable

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4 - Data Explorer

Is it possible to recreate this formula in Airtable?

Where:

• i = IRR
L = Loan amount
F = Points and all other lender fees
P = Monthly payment
n = Month when the balance is paid in full
Bn = Balance in month n

This equation can be solved for i only through a series of successive approximations, which must be done by computer. Many calculators will also do it provided that all the values of P are the same.

I’m trying to solve for i

All items except for i would be supplied via columns inside Airtable

1 Solution

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18 - Pluto

Since it can only be solved via successive approximations, you cannot calculate it in a single formula in Airtable.

However, it can be calculated by a custom script in the Scripting block. If no-one posts a Script, you could probably hire a consultant to write it for you.