Simple interest calculator help


Settings Remark
Principal amount (P) The principal amount (P) is the amount lent or borrowed.

The amount may contain max two digits after its decimal point.
The amount entered may contain a comma (,) or point (.) as a decimal point separator.
Do not use the thousands separator in the amount.

Correct entered amounts
5123.04
5123,04
6123

Incorrect entered amounts
5,123.04
5.123,04
5123.041

The simple interest equation:
I = P * R * T
FV = P + I

FV = P + P * R * T
FV = P * (1 + R * T)
P = FV / (1 + R * T)

where:
FV = Future value
I = Interest amount
P = Principal amount
R = Interest rate (as a decimal, not in percentage)
T = Time period