Interest calculation
• Simple interest
FV = PV (1 + rt)
• Compound interest
FV = PV (1 + r)
t
• Combined interest
FV = PV (1 + r)
n
(1 + rt) ,
where n ∈ N t < 1.
• Eective interest rate
re = 1 +
r
m
m
− 1
• Interest intensity
f = ln (1 + re) ⇒ re = ef
− 1
• Continous interest
FV = PV eft
1