FD Calculator
Work out the maturity value and total interest on a fixed deposit. Enter your deposit, interest rate, tenure and compounding frequency to see how your money grows.
Frequently Asked Questions
How often is FD interest compounded?
It varies by country and bank: Indian FDs often compound quarterly, while US CDs and UK savings accounts commonly compound monthly or annually. Check your scheme and pick monthly, quarterly, half-yearly or annually here to match it.
Does it show the maturity value?
Yes. It shows the maturity value at the end of the tenure, your original deposit, and the total interest earned, plus a year-by-year growth table.
Is TDS or tax included?
No. The figures are gross interest before any tax such as TDS. Your actual in-hand amount may be lower after applicable taxes.
Understanding the FD Calculator
The FD Calculator estimates what a fixed (term) deposit will be worth at maturity. You enter your deposit amount, the annual interest rate your bank quotes, the tenure (in years and/or months), and how often interest compounds. It instantly shows the maturity value, your original deposit, and the total interest earned, alongside a year-by-year growth table and a chart that plots your growing balance against the flat deposit line. Everything runs in your browser and is currency-aware, so amounts display in your chosen currency. It is ideal for comparing FD schemes, planning savings goals, or sanity-checking the maturity figure a bank gives you before you lock in your money.
How it works
Pick your inputs and the tool applies the standard compound-interest formula for the whole tenure, where the rate is split across the number of compounding periods per year. Compounding frequency is not universal — it varies by country and bank: Indian FDs often compound quarterly, US CDs frequently compound monthly or daily, and UK fixed-rate savings commonly compound annually. The tool lets you choose monthly, quarterly, half-yearly, or annual so you can match whatever your own scheme uses. For the growth table and chart, the same formula is evaluated at each elapsed year (and a final partial year if your tenure includes extra months), so each row shows the balance reached and the interest added that year. Interest earned is simply the maturity value minus your deposit. All figures are gross, before any tax such as TDS.
Worked example
Suppose you deposit 100,000 at 7% per year for 5 years with quarterly compounding (n = 4). Then r = 0.07 and the maturity value is 100,000 × (1 + 0.07/4)^(4 × 5) = 100,000 × (1.0175)^20 ≈ 141,478. So you earn roughly 41,478 in interest over the five years. Switching to monthly compounding (n = 12) nudges the maturity slightly higher to about 141,763, showing how more frequent compounding modestly boosts returns.
Tips & common mistakes
- Compounding frequency varies by country and bank — Indian FDs often compound quarterly, US CDs monthly or daily, and UK savings annually — so set the frequency to match your own scheme rather than assuming a default.
- More frequent compounding (monthly vs annual) increases maturity slightly, but the effect is small compared with the rate and tenure.
- The result is gross interest before tax; banks may deduct tax at source (such as TDS in India), so your in-hand amount can be lower.
- Use the years + months fields together for odd tenures like 1 year 6 months or 555 days expressed as months.
- Compare a cumulative FD (interest reinvested, as modelled here) against a payout FD where interest is paid out periodically and not compounded.
- Re-run with each bank's quoted rate and compounding frequency to compare maturity values before locking your money in.
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Reviewed by the TopOpenTools editorial team · Last updated June 2026. These tools provide general estimates for educational purposes only and are not financial, tax, insurance, investment, or medical advice. Verify important decisions with a qualified professional.