Fixed Deposit Calculator
What your FD matures to.
Calculate fixed deposit maturity amount using principal, interest rate, term, and compounding frequency to see total balance and interest earned.
What this tool does
Fixed deposit maturity amount equals principal compounded at the annual rate over the term, with the chosen compounding frequency. The calculator models what your deposit grows to by applying compound interest at regular intervals—monthly, quarterly, annually, or another frequency you select. The maturity amount shown represents your total balance at the end of the term, while interest earned is the gain above your initial principal. The result depends most on the principal amount, annual rate, and length of term; compounding frequency has a smaller effect. This tool illustrates growth under stable conditions and is useful for comparing different deposit offers or terms. The calculation assumes the rate remains fixed and no deposits or withdrawals occur during the term.
Quick answer: with the default values, the result is $14,147.78 (Maturity Amount). Adjust the values below for your own figures.
Enter Values
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Formula Used
Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
Fixed deposits lock money for a set term in exchange for a fixed contracted rate. The maturity amount depends on principal, rate, term, and compounding frequency. Quarterly compounding is common in some markets, annual in others. This calculator handles both.
10,000 at 7% for 5 years with quarterly compounding matures to 14,148. The same at annual compounding gives 14,026 - a small but real difference. More frequent compounding always produces higher returns; over long terms the gap widens noticeably.
Fixed deposits are low-risk. The rate is fixed at origination so inflation risk is real - a 7% FD during 5% inflation has just 2% real return. The rate is often compared to long-term government bond yields (similar risk) rather than to savings account rates, which are shorter term and lower risk.
A worked example
With the defaults: principal of 10,000, annual rate of 7%, term of 5, compounding frequency of 4. The tool returns 14,147.78. You can adjust any input and the result updates as you type — no submit button, no reload. That's the real power here: seeing how sensitive the output is to one or two assumptions.
What moves the number most
The result responds to Principal, Annual Rate, Term, and Compounding Frequency. Not every input has equal weight. Adjusting one input at a time toward extreme values shows which ones move the result most.
The formula behind this
Standard compound interest formula: Maturity = Principal × (1 + rate/frequency)^(frequency × years). Everything the calculator does is shown in the formula box below, so you can check the math against your own spreadsheet if you want.
Why run this
Running the numbers makes the trade-offs concrete. Small changes in the inputs can move the result more than intuition suggests, which is hard to judge without working it out.
What this doesn't capture
This is a simplified model that holds its assumptions constant. Real outcomes vary with market conditions, costs, taxes, and timing, so the figure is best read as one scenario rather than a forecast.
£10,000 at 7% for 5 years compounded 4x/yr = $14,147.78.
Inputs
| Interest Earned | $4,147.78 |
|---|---|
| Principal | $10,000.00 |
| Rate | 7.00% |
| Term | 5 years |
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
This calculator computes the maturity value of a fixed deposit using the compound interest formula. The model takes your principal amount and applies the annual interest rate compounded at your chosen frequency—monthly, quarterly, or annually—over your deposit term. The calculation assumes a fixed interest rate that remains constant throughout the period, and that all interest is reinvested without withdrawal. The result shows the total value at maturity, combining original principal and accrued interest. The calculator does not account for taxes, inflation, fees charged by the deposit provider, or changes in interest rates. It also models growth assuming regular compounding intervals and does not reflect any early withdrawal penalties or market-related factors.
References
Frequently Asked Questions
Monthly or quarterly compounding?
Is a fixed deposit safe?
Break an FD for a better rate?
What's the difference between FD and savings?
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