Interest Rate and Compound Interest Calculator / Solver.

Click here to launch the calculator

Use this calculator to work out Annual Percentage Rates, or perform calculations relating to loans and interest rates.

(Requires Flash Player 7 or higher).

You can use this calculator / solver to:

1. Work out the Annual Percentage Rate (APR) from a monthly rate of interest, or vice versa. (You can use change the interest period from monthly to daily, weekly, quarterly or half-yearly).

2. Work out the factors in Compound Interest Loan calculations, based upon three of the known factors. Therefore, you need to enter three of the following values:

Initial Value (i.e. the amount of money that is borrowed)
Interest Rate
The duration / length of the loan (in years)
The total amount of money that is repaid (i.e. initial value + interest)

Points to be aware of:

All results are rounded down to 4 decimal places, and this should be sufficient for most purposes. You can round this down further yourself (i.e. to 2 decimal places).

When enter 'part years' in the loan calculator (i.e. 7 years and 10 months), these need to be added as a fraction.

i.e. To work out 10 months as a decimal fraction, divide 10 by 12, and this gives the result 0.8 - therefore, enter 7.8 into the calculator. Any results calculated this way will also show the years and months underneath.

The figures projected by the calculator are only for guidance purposes - whilst we aim to ensure the accuracy of our calculators, we can take no responsibility for the usage made of the calculations generated on this site.

Recent Financial Topics

Retail sales increased by 2 per cent year-on-year in the UK last month, according to the British Retail Consortium, as the cold and wet weather encouraged consumers to purchase warm clothing.

BUSINESS LIVE: Retail sales rose 2% last month; Imperial hikes shareholder returns; Vistry cuts profit outlook
08/10/2024 04:34 AM

A special window is open that lets you buy up to ten extra years of state pension if you have gaps in your National Insurance (NI) record.

How to boost your state pension by up to £149,000: The rare offer that is 'one of the best investments you can make'... but a deadline is looming
08/10/2024 04:21 AM

Lynch, 59, had been locked in legal battles with HP for more than a decade. The problems arose after the sale of his company Autonomy to HP.

HP's tragic fall from grace: Its pursuit of Mike Lynch's widow is just the latest in a line of controversies
08/10/2024 04:19 AM