Does this account for contributions?

No — assumes a single lump sum with no additions.

No — assumes a single lump sum with no additions.

Interest Rate Calculator

Investment

Solve for the interest rate given a present value, future value and time.

Present Value

Future Value Goal

Years

$$r \;=\; \left(\frac{FV}{PV}\right)^{1/t} - 1$$

Where

FVfuture value

Pprincipal

Cperiodic deposit

rperiodic rate

nperiods

PVpresent value

tyears