Compound Interest Calculator with Periodic Contributions: Calculate Future Investment Value and Interest on a Principal Lent, Deposited or Borrowed
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Calculator: Compound Interest, Future Investment Value
FV = P × (1 + r/n)n×t + A × [(1 + r/m)m×t - 1] ÷ r/m
FV = Future Value of investment
P = Principal amount invested (the original contribution)
A = Regular contribution (additional money added periodically to the initial investment, P)
r = Annual Interest Rate the investment is earning
n = Number of times the interest compounds during a year
m = Number of times the regular contribution is made during a year
t = Number of years the investment is going to be active
t and r are expressed using the same time units
The Latest Calculations: Compound Interest Amounts and Future Investment Values
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 1,284.00 Annual Interest Rate: 5.50% Compound Frequency: half-yearly Duration: 2 years 2 months and 4 days Periodic Contribution: 8.00 Contribution Frequency: half-yearly Contribution added to the balance: at the beginning of each compounding period | Jul 29 14:37 UTC (GMT) |
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 120,847.00 Annual Interest Rate: 1.25% Compound Frequency: daily Duration: 1 year and 28 days | Jul 29 14:36 UTC (GMT) |
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 981.00 Annual Interest Rate: 5.50% Compound Frequency: half-yearly Duration: 4 years and 7 months | Jul 29 14:35 UTC (GMT) |
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 45,291.00 Annual Interest Rate: 20.00% Compound Frequency: daily Duration: 11 days Transaction Fee Rate: 2.00% | Jul 29 14:33 UTC (GMT) |
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 165,696.00 Annual Interest Rate: 10.00% Compound Frequency: monthly Duration: 6 months and 12 days Periodic Contribution: 196.00 Contribution Frequency: monthly Contribution added to the balance: at the end of each compounding period | Jul 29 14:08 UTC (GMT) |
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 75.10 Annual Interest Rate: 2.00% Compound Frequency: daily Duration: 4 years and 2 days | Jul 29 14:03 UTC (GMT) |
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 162,448.00 Annual Interest Rate: 10.00% Compound Frequency: monthly Duration: 4 years 9 months and 25 days Periodic Contribution: 193.00 Contribution Frequency: monthly Contribution added to the balance: at the end of each compounding period | Jul 29 14:02 UTC (GMT) |
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 1,107.00 Annual Interest Rate: 10.00% Compound Frequency: daily Duration: 4 years 2 months and 1 day Periodic Contribution: 450.00 Contribution Frequency: monthly Contribution added to the balance: at the beginning of each compounding period | Jul 29 13:46 UTC (GMT) |
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 1,118.00 Annual Interest Rate: 10.00% Compound Frequency: daily Duration: 1 year 1 month and 12 days Periodic Contribution: 490.00 Contribution Frequency: monthly Contribution added to the balance: at the beginning of each compounding period | Jul 29 13:37 UTC (GMT) |
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 74.40 Annual Interest Rate: 2.00% Compound Frequency: daily Duration: 3 years and 1 day | Jul 29 13:33 UTC (GMT) |
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 7,527.00 Annual Interest Rate: 2.00% Compound Frequency: daily Duration: 1 year 1 month and 8 days | Jul 29 13:32 UTC (GMT) |
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 2,071.00 Annual Interest Rate: 5.50% Compound Frequency: half-yearly Duration: 2 years 7 months and 21 days Periodic Contribution: 167.00 Contribution Frequency: half-yearly Contribution added to the balance: at the beginning of each compounding period | Jul 29 13:32 UTC (GMT) |
| Calculate the Compound Interest Amount and the Future Investment Value. Principal (Initial Amount): 1,218.00 Annual Interest Rate: 5.50% Compound Frequency: half-yearly Duration: 3 years 4 months and 21 days Periodic Contribution: 114.00 Contribution Frequency: half-yearly Contribution added to the balance: at the beginning of each compounding period | Jul 29 13:26 UTC (GMT) |
| » Monthly Tables: Compound Interest and Future Value (Earned Amounts) Calculated |
Compound interest.
Interest. Simple and compound interest. Differences.
- When someone lends money to someone else, the borrower usually pays a fee to the lender. So the due interest is a sum paid or charged for the use of money or for borrowing it. The interest depends on:
- 1) the duration of the loan
- 2) the initial amount of money lent or borrowed, called principal
- 3) the interest rate (the percentage of the principal charged as interest)
- 4) the compound frequency.
- Number 4 in the list above, the frequency of the compounding interest, also makes the difference between compound and simple interest.
1. Simple Interest...
- ... is calculated only at the end of the loan period as a fixed percentage of the borrowed amount.
2. Compound Interest...
- ... is calculated not only at the end of the loan period, but periodically, over shorter periods of time, for example daily, weekly, monthly, ... These shorter periods are called compounding periods.
- The interest compounding frequency shows us how often is the interest calculated over the loan period. If the interest is calculated daily - then we have a daily compounding frequency, and the interest is said to be compounded daily. If it is calculated weekly - then we have a weekly compounding frequency, and the interest is said to be compounded weekly. And so on, monthly, quarterly, half-yearly, annually, ...
- The amount that results as an interest at the end of such a shorter compounding period is immediately added to the principal amount, so that the interest accrued up to that point contributes to the calculation of the interest for the next compounding period, and not only the principal amount, as it was in the case of simple interest.
- Thus, in the end, the interest also earns interest and not just the principal. It follows that the compound interest will produce a slightly higher amount in the form of interest than the simple interest.
How is the compound interest being calculated?
- If the annual interest rate is r% and the interest compounding frequency is annual, then it means that the compounding period is one year long and the interest is calculated once a year.
- 1. In one year, for the amount of P, an interest of (r% of P) is earned:
- C1 = r% × P
- The total amount accumulated after one year is:
- A1 = P + C1 = P + r% × P = P × (1 + r%)
- 2. After the second year, the interest is:
- C2 = r% × A1 = r% × P × (1 + r%)
- And the total amount is:
- A2 = A1 + C2 = P × (1 + r%) + r% × P × (1 + r%) = P × (1 + r%) × (1 + r%) = P × (1 + r%)2
- 3. After three years, the accrued interest is:
- C3 = r% × A2 = r% × P × (1 + r%)2
- And the total amount is:
- A3 = A2 + C3 = P × (1 + r%)2 + r% × P × (1 + r%)2 = P × (1 + r%) × (1 + r%)2 = P × (1 + r%)3
- n. After n years, the interest is:
- Cn = r% × An-1 = r% × P × (1 + r%)n-1
- And the total amount is:
- An = An-1 + Cn = P × (1 + r%)n-1 + r% × P × (1 + r%)n-1 = P × (1 + r%) × (1 + r%)n-1 = P × (1 + r%)n