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 1 units (Dollar, Euro, Pound, etc.), from date: Jan 01, 0422, to date: Jan 01, 0004, namely for a period of 577,813 days (5,016 Months), with an annual simple flat interest rate of 10% if the commission fee (withdrawal) is 0%. Aug 05 17:59 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: Mar 18, 2019, to date: Mar 18, 2022, namely for a period of 1,096 days (36 Months), with an annual simple flat interest rate of 2% if the commission fee (withdrawal) is 0%. Aug 05 17:58 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 60,000 units (Dollar, Euro, Pound, etc.), from date: Feb 22, 2019, to date: Aug 22, 2019, namely for a period of 181 days (6 Months), with an annual simple flat interest rate of 40% if the commission fee (withdrawal) is 0%. Aug 05 17:58 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 212 units (Dollar, Euro, Pound, etc.), from date: Nov 09, 2018, to date: Dec 09, 2021, namely for a period of 1,126 days (37 Months), with an annual simple flat interest rate of 2% if the commission fee (withdrawal) is 0%. Aug 05 17:58 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 0 units (Dollar, Euro, Pound, etc.), from date: Mar 28, 0688, to date: Apr 27, 2019, namely for a period of 486,167 days (15,973 Months without 1 Days), with an annual simple flat interest rate of 12% if the commission fee (withdrawal) is 96%. Aug 05 17:58 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: Sep 20, 2018, to date: Sep 20, 2020, namely for a period of 731 days (24 Months), with an annual simple flat interest rate of 2% if the commission fee (withdrawal) is 0%. Aug 05 17:58 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 0.11 units (Dollar, Euro, Pound, etc.), from date: May 14, 0756, to date: Jun 30, 2018, namely for a period of 460,983 days (15,145 Months and 16 Days), with an annual simple flat interest rate of 6% if the commission fee (withdrawal) is 364%. Aug 05 17:58 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 0 units (Dollar, Euro, Pound, etc.), from date: May 18, 0232, to date: Jun 18, 0888, namely for a period of 239,631 days (7,873 Months), with an annual simple flat interest rate of 0% if the commission fee (withdrawal) is 284%. Aug 05 17:57 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: Aug 02, 2000, to date: Aug 02, 2018, namely for a period of 6,574 days (216 Months), with an annual simple flat interest rate of 2% if the commission fee (withdrawal) is 0%. Aug 05 17:57 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of - 1,650 units (Dollar, Euro, Pound, etc.), from date: Aug 21, 0886, to date: Apr 21, 1998, namely for a period of 406,027 days (13,340 Months), with an annual simple flat interest rate of 0.01% if the commission fee (withdrawal) is 0%. Aug 05 17:56 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 726 units (Dollar, Euro, Pound, etc.), from date: Jun 15, 2018, to date: Jul 15, 2023, namely for a period of 1,856 days (61 Months), with an annual simple flat interest rate of 5% if the commission fee (withdrawal) is 0%. Aug 05 17:55 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: Oct 30, 0784, to date: Oct 30, 2023, namely for a period of 452,535 days (14,868 Months), with an annual simple flat interest rate of 10% if the commission fee (withdrawal) is 0%. Aug 05 17:55 UTC (GMT)
Calculate due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 0 units (Dollar, Euro, Pound, etc.), from date: Apr 27, 0776, to date: Mar 27, 2017, namely for a period of 453,235 days (14,891 Months), with an annual simple flat interest rate of 828% if the commission fee (withdrawal) is 0%. Aug 05 17:54 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.