Financial Mathematics Calculator

Calculate compound interest, savings plans, loan payments, and purchasing power on one page. All results update live as you change inputs.

Compound Interest

How does a one-time investment grow?

Initial capital (EUR)

Interest rate p.a. (%)

Duration (years)

Compounding per year

Ending balance-

Interest earned-

Growth factor-

Monthly contributions plus return.

One-time starting amount (EUR)

Monthly contribution (EUR)

Return p.a. (%)

Duration (years)

Portfolio value at end-

Total contributions-

Return from growth-

Annuity and total cost of a loan.

Loan amount (EUR)

Interest rate p.a. (%)

Duration (years)

Monthly payment-

Total payment-

Total interest-

How much remains in real terms from a nominal amount?

Nominal amount today (EUR)

Inflation p.a. (%)

Nominal growth p.a. (%)

Time period (years)

Purchasing power without growth-

Loss of purchasing power-

Real value with growth-

K = K0 * (1 + p / m)^(m * n) for compound interest.

FV = K0 * (1 + r)^N + S * ((1 + r)^N - 1) / r for the savings plan.

A = K * i / (1 - (1 + i)^(-N)) for the monthly annuity.

Realwert = Nominal / (1 + inflation)^n for purchasing power.