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Future Value CalculatorFuture value of money as of any date.


The value of money will change over time. Meaning, what a dollar will buy today is not what a dollar will buy in the future. What the dollar buys in the future is called its future value. A future value calculator is the tool one uses to calculate a dollar's future value.

Two factors impact the dollar's FV (or any currency's FV):

  • inflation (or deflation)
  • investment return

The greater the rate of inflation the less the dollar will buy. The greater the investment's rate-of-return (or interest rate) or the greater the rate of deflation, the more the dollar will buy.

This future value calculator will calculate the FV of an amount or asset after an exact number of days assuming any rate-of-return (tested to 99% per annum) for 12 compounding frequencies plus simple interest.

Because this calculator is date sensitive, and because it supports many compounding options, it is a suitable tool for calculating the balance of a debt when the debtor has not made any payments. More details below the calculator



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More About Future Value

The future value calculator normally calculates a nominal future value. This means the calculated future value is the result of an investment gain or from interest earned on the money. A nominal future value does not account for inflation.

If you want to know the real future value, you can do one of two things.


If you want to to know the purchasing power of the original amount after inflation, then deduct an estimated inflation rate from the Annual Interest Rate. Example: If your Annual Interest Rate is 4.5%, and you estimate that inflation will average 2% per year, then rather than enter 4% for your rate-of-return, enter 2.5% instead. The calculated FV will now be the real future value.

rate-of-return or interest rate
In this case, for our purposes, interest rate and rate-of-return are the same thing.

This is a bit of an oxymoron more though. Economists call this the real future value, but it's actually an estimated real future value because we can only estimate the future rate of inflation.

Nonetheless, the real future value is closer to an accurate calculation than the nominal future value which as you can see, doesn't even consider inflation.

If on the other hand, you want to be compensated for inflation, then you add the inflation rate to the annual interest rate. If for example, someone had owed you $2,000 for five and a half years and they agreed to compensate you for 2% inflation on top of a 4% interest rate, then you would add the inflation rate to the rate of return.

The result thus includes the effect of inflation. Or you can think of the calculation this way. If I want to make a real 4.5% gain on my investment, how much will I need to also compensate for the loss of value due to inflation?


14 Comments on “Future Value Calculator”

Join the conversation. Tell me what you think.
  • Are you able to provide a version of the future value calculator in which the interest rate can be set to monthly as well as yearly?

    • Of course, nearly anything can done. Do you mean you want to enter a monthly interest rate? And what do you mean by "provide?" Do you want a custom version to install on your own website? Or do you want me to host a calculator with such a feature? If the latter, I would be able to add the feature to this calculator, but I would need to have a good use case for doing so. Mostly, I would think users could convert a monthly rate to an annual rate.

      • Hi Karl and thanks for your reply.
        As a lawyer I do a lot of debt recovery work but I sometimes struggle to find a suitable calculator.  If you can host a debt recovery calculator with a full suite of options, that would be very helpful. However, if you don’t want to do that, I am open to the idea of a bespoke calculator for my use only.

  • Karl, I need to calculate the interest due on a specific debt so that I can claim that interest in court proceedings. A debt reduction calculator cannot do that.

  • The Ultimate Loan Payoff Calculator is quite helpful but it needs to be changed for debt recovery purposes. For example, all references to a loan and a payment frequency have to removed. Also, I need to claim interest at a monthly rate (if applicable) not just an annual rate. Can this be done?

    • The C-Value! program, which works like the UFC, allows the user to set the label descriptions (under settings and event names).

      Adding the the ability to select interest rates based on a month, would be quite costly. The calculator is complex and to add the feature would take a lot of testing. I’m not inclined to do it because no one (as I recall) has ever asked for the feature. If someone wanted a custom version it could be arrange, but it would be in the 5 figures.

      However, as I believe I mentioned before, one could convert a monthly rate to an annual rate. For example, a monthly rate of 1.2% is equal to an annual rate of 14.4% (1.2 x 12). Both values return 488.71 interest on $10,000 for 4 months.

  • If I had a loan of $100 at 5% and I wanted to compound annually with 360 days in a year, I noticed that at 364 days, gain on investment is $5.06. If you put in 365 days, my gain on investment is down to $5. Why is that?

    • This is due to the oddities of calendars and interest calculations.

      With annual compounding, the interest rate used is the nominal rate, that is 5% or 0.05. Invest the money for 365 days (assuming the time period does not span a leap year) and the money will be invested for one year and the 5% rate is used.

      But, invest the money for 364 days, and since that is less than a year, the annual compounding rate is not applicable. 364 days are all odd days, and therefore the daily rate is used. Since you’ve picked a 360 day year, the interest rate used will be 0.05/360.

      One more comment. So you know, I generally do not discuss financial equations. That’s not what this site is about. I can’t afford to spend the time, “getting into the weeds.” Therefore, I limit the question I answer to “What calculator do I use?” and “How do I used this calculator or feature”?

  • Hi great work done,

    Can i get a FV calculator with irregular monthly payments but same interest rate.

  • Md.Imran Hossain says:

    How I can use this calculator on my wordpress website?

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