Compound interest calculator

See how much your money can grow with interest on interest, adding a starting amount and a deposit every month. Works with any currency.

Hasil anda akan dipaparkan di sini Isi medan dan ketik Calculate growth.

How we calculate

Each month’s interest is added to the balance and starts earning interest too. The monthly deposit goes in at the end of each month.

Final amount = Starting × (1 + i)ⁿ + Deposit × ((1 + i)ⁿ − 1) ÷ i

a = monthly rate as a decimal · n = months. A yearly rate becomes the equivalent monthly rate: i = (1 + yearly rate)^1/12 − 1. Taxes and fees are not deducted.

Soalan lazim

Is this return guaranteed?

No. It is a projection with a fixed rate. In real life the rate can change, and taxes and fees lower the result.

Which rate should I use?

Use the rate of the investment you are looking at, per month or per year.

Can I leave the monthly deposit out?

Yes. Set the deposit to 0 to see only how the starting amount grows.

Other tools

Simple interest Returns with simple interest, a starting amount and monthly deposits. Gunakannya → 50/30/20 budget Split your income between needs, wants and savings. Gunakannya → Emergency fund How much to keep and how long it takes to get there. Gunakannya →