Calculated simple flat rate due interest on an amount of money lent, deposited or borrowed by the interest rate, principal (starting amount), duration and additional transaction fees (withdrawal, payment in advance).

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Calculate simple flat rate interest on a principal borrowed, lent

Simple flat rate interest = (Principal × Annual simple flat interest rate × Duration in days) ÷ Number of days in a year

Latest calculated simple flat rate interest values

Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 17,700 units (Dollar, Euro, Pound, etc.), from date: May 16, 0784, to date: Dec 16, 2017, namely for a period of 450,558 days (14,803 Months), with an annual simple flat interest rate of 3.5% if the commission fee (withdrawal or payment) is 1%. Dec 09 18:56 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 50,000 units (Dollar, Euro, Pound, etc.), from date: Jun 03, 0482, to date: Jun 03, 2017, namely for a period of 560,647 days (18,420 Months), with an annual simple flat interest rate of 11.95% if the commission fee (withdrawal or payment) is 0%. Dec 09 18:56 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 1,470 units (Dollar, Euro, Pound, etc.), from date: May 08, 2016, to date: May 08, 2017, namely for a period of 365 days (12 Months), with an annual simple flat interest rate of 770% if the commission fee (withdrawal or payment) is 0%. Dec 09 18:56 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 600 units (Dollar, Euro, Pound, etc.), from date: Jun 07, 2017, to date: Jul 07, 2017, namely for a period of 30 days, with an annual simple flat interest rate of 23% if the commission fee (withdrawal or payment) is 224%. Dec 09 18:56 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 10,000 units (Dollar, Euro, Pound, etc.), from date: Jun 18, 2017, to date: Jul 18, 2017, namely for a period of 30 days, with an annual simple flat interest rate of 3% if the commission fee (withdrawal or payment) is 590%. Dec 09 18:56 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 2,400 units (Dollar, Euro, Pound, etc.), from date: Nov 02, 2008, to date: Dec 02, 2017, namely for a period of 3,317 days (109 Months), with an annual simple flat interest rate of 10.5% if the commission fee (withdrawal or payment) is 0%. Dec 09 18:55 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 2,000 units (Dollar, Euro, Pound, etc.), from date: Jan 01, 0556, to date: Jul 01, 2017, namely for a period of 533,801 days (17,538 Months), with an annual simple flat interest rate of 18% if the commission fee (withdrawal or payment) is 0%. Dec 09 18:55 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 420 units (Dollar, Euro, Pound, etc.), from date: May 30, 2016, to date: Jun 30, 2017, namely for a period of 396 days (13 Months), with an annual simple flat interest rate of 0.02% if the commission fee (withdrawal or payment) is 0%. Dec 09 18:55 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 10,000 units (Dollar, Euro, Pound, etc.), from date: Dec 06, 2017, to date: Nov 06, 2027, namely for a period of 3,622 days (119 Months), with an annual simple flat interest rate of 2% if the commission fee (withdrawal or payment) is 0%. Dec 09 18:55 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 8,000 units (Dollar, Euro, Pound, etc.), from date: Oct 17, 2018, to date: Jan 17, 2019, namely for a period of 92 days (3 Months), with an annual simple flat interest rate of 5% if the commission fee (withdrawal or payment) is 0%. Dec 09 18:55 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 100 units (Dollar, Euro, Pound, etc.), from date: May 25, 0904, to date: May 25, 2017, namely for a period of 406,515 days (13,356 Months), with an annual simple flat interest rate of 3% if the commission fee (withdrawal or payment) is 8%. Dec 09 18:55 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 100 units (Dollar, Euro, Pound, etc.), from date: Jul 24, 2018, to date: Aug 24, 2056, namely for a period of 13,911 days (457 Months), with an annual simple flat interest rate of 25% if the commission fee (withdrawal or payment) is 0%. Dec 09 18:55 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 100 units (Dollar, Euro, Pound, etc.), from date: Jul 01, 0478, to date: Dec 31, 2010, namely for a period of 559,734 days (18,389 Months and 30 Days), with an annual simple flat interest rate of 2% if the commission fee (withdrawal or payment) is 0%. Dec 09 18:55 UTC (GMT)
All users calculated simple flat rate interest values


Simple flat rate interest.

Interest

  • 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 money. The interest depends on: 1) the period of the loan 2) the amount of money lent or borrowed (called principal) and 3) the interest rate (the percentage of the principal charged as interest).
  • For example, for some bank deposits is not uncommon to pay an interest rate of 3.5% on the principal, annualy. Banks are also using these temporarily owned amounts of money by introducing them back into the cash flow circuit or are granting loans (for investments, for example) on which they are again charging interest.

Annual simple flat interest rate

  • The simple annual interest rate, or the percentage of the principal charged as interest for a period of one year, shows us that for an amount of 100 units (ex: Dollar, Euro, Yen, Pound, Franc), in a year, the interest is calculated as a percentage p% of the principal: I = p% × 100 units.
  • A deposit of S units generates a one year simple interest of: I = S × p% units, and in n years, the same deposit of S units generates an interest of: I = S × p% × n units.

Annual simple flat rate interest formula:

  • I = S × p% × n

  • I = n years simple flat rate interest charged
  • S = initial amount (principal)
  • p% = annual simple flat interest rate (percentage of the principal charged as interest)
  • n = number of years of the lending or borrowing the money

Examples of how the simple flat rate interest formula works:

  • 1) What interest, I, generates in n = 5 years a principal of S = 20,000 units if the annual simple flat interest rate is p% = 3.5%?
    Answer:
    I = S × p% × n = 20,000 × 3.5% × 5 = 20,000 × 3.5 ÷ 100 × 5 = 1,000 × 3.5 = 3,500 units
  • 2) What is the simple flat interest rate, p%, if a principal of S = 12,000 units is charged a n = 6 years interest of I = 2,880 units?
    Answer:
    I = S × p% × n =>
    p% = I ÷ (S × n) = 2,880 ÷ (12,000 × 6) = 0.04 = 4%.

Annual simple flat rate interest formula calculated for a period of n years:

  • Interest, I = S × p% × n
  • Principal, S = I ÷ (p% × n)
  • Interest rate, p% = I ÷ (S × n)
  • Number of years (period): n = I ÷ (S × p%)

Annual simple flat rate interest formula calculated for a period of m months:

  • Interest, I = (S × p% × m) ÷ 12
  • Principal, S = (12 × I) ÷ (p% × m)
  • Interest rate, p% = (12 × I) ÷ (S × m)
  • Number of months of the period, m = (12 × I) ÷ (S × p%)

Annual simple flat rate interest formula calculated for a period of d days:

  • Interest, I = (S × p% × d) ÷ 365
  • Principal, S = (365 × I) ÷ (p% × d)
  • Simple flat interest rate, p% = (365 × I) ÷ (S × d)
  • Number of days of the period, d = (365 × I) ÷ (S × p%)

More examples of how the simple flat rate interest formula works:

  • 1) Calculate the due interest on a principal of S = 400 units in m = 5 months, with a simple flat interest rate of p% = 4%.
    Answer:
    I = (S × p% × m) ÷ 12 = (400 × 4% × 5) ÷ 12 = (400 × 4 ÷ 100 × 5) ÷ 12 = 16 × 5 ÷ 12 = 20 ÷ 3 = 6.67 units
  • 2) Calculate the due interest generated by a principal of S = 400 units in m = 5 months if the simple flat interest rate of p% = 4.5%.
    Answer:
    I = (S × p% × m) ÷ 12 = (400 × 4.5% × 5) ÷ 12 = (400 × 4.5 ÷ 100 × 5) ÷ 12 = 18 × 5 ÷ 12 = 15 ÷ 2 = 7.5 units.