Online calculator: calculate the due simple flat rate interest

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 600 units (Dollar, Euro, Pound, etc.), from date: Sep 01, 2020, to date: Jan 01, 2023, namely for a period of 852 days (28 Months), with an annual simple flat interest rate of 19.2% if the commission fee (withdrawal or payment) is 0%. Jul 16 02:25 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 1,500 units (Dollar, Euro, Pound, etc.), from date: Apr 27, 2020, to date: Apr 27, 2021, namely for a period of 365 days (12 Months), with an annual simple flat interest rate of 6% if the commission fee (withdrawal or payment) is 0%. Jul 16 02:25 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 6,671 units (Dollar, Euro, Pound, etc.), from date: Jul 09, 1982, to date: Jun 27, 2013, namely for a period of 11,311 days (371 Months and 18 Days), with an annual simple flat interest rate of 0.03% if the commission fee (withdrawal or payment) is 0%. Jul 16 02:25 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 90,000 units (Dollar, Euro, Pound, etc.), from date: May 01, 2017, to date: Jun 01, 2017, namely for a period of 31 days, with an annual simple flat interest rate of 824% if the commission fee (withdrawal or payment) is 0%. Jul 16 02:24 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 4,000 units (Dollar, Euro, Pound, etc.), from date: Mar 19, 2018, to date: Apr 19, 2018, namely for a period of 31 days, with an annual simple flat interest rate of 105% if the commission fee (withdrawal or payment) is 0%. Jul 16 02:24 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 11,022 units (Dollar, Euro, Pound, etc.), from date: Feb 15, 2018, to date: Mar 15, 2018, namely for a period of 28 days, with an annual simple flat interest rate of 0.7% if the commission fee (withdrawal or payment) is 0%. Jul 16 02:23 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: Feb 17, 0288, to date: Jan 17, 2019, namely for a period of 632,204 days (20,771 Months), with an annual simple flat interest rate of 3% if the commission fee (withdrawal or payment) is 0%. Jul 16 02:23 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 5,000 units (Dollar, Euro, Pound, etc.), from date: Apr 06, 2020, to date: Apr 06, 2021, namely for a period of 365 days (12 Months), with an annual simple flat interest rate of 9.8% if the commission fee (withdrawal or payment) is 0%. Jul 16 02:23 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: Feb 07, 2018, to date: Mar 07, 2018, namely for a period of 28 days, with an annual simple flat interest rate of 854% if the commission fee (withdrawal or payment) is 0%. Jul 16 02:22 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 16, 0602, to date: May 16, 2018, namely for a period of 517,184 days (16,992 Months), with an annual simple flat interest rate of 2% if the commission fee (withdrawal or payment) is 2%. Jul 16 02:22 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 114,224 units (Dollar, Euro, Pound, etc.), from date: Apr 12, 2017, to date: Apr 13, 2047, namely for a period of 10,958 days (360 Months and 1 Day), with an annual simple flat interest rate of 5.33% if the commission fee (withdrawal or payment) is 0%. Jul 16 02:21 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 20,000 units (Dollar, Euro, Pound, etc.), from date: Sep 01, 2018, to date: Sep 30, 2023, namely for a period of 1,855 days (60 Months and 29 Days), with an annual simple flat interest rate of 500% if the commission fee (withdrawal or payment) is 0%. Jul 16 02:21 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 992 units (Dollar, Euro, Pound, etc.), from date: Jun 18, 2017, to date: Jul 18, 2018, namely for a period of 395 days (13 Months), with an annual simple flat interest rate of 9% if the commission fee (withdrawal or payment) is 0%. Jul 16 02:21 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.