Calculator: calculate simple flat rate interest on a principal starting money amount lent, deposited or borrowed by the interest rate, duration and additional transaction fees (withdrawal, payment in advance)

Calculate simple flat rate interest on amount of money borrowed, lent

Latest calculated simple flat interest values

Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 203,630,334 units (Euro, Dollar, etc.), from date: Feb 01, 2000, to date: Feb 01, 2015, namely for a period of 5,479 days (180 Months), with an annual simple flat interest rate of 5% if the commission fee (withdrawal or payment) is 0%.May 27 19:56 UTC (GMT)
Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 300 units (Euro, Dollar, etc.), from date: Nov 20, 2016, to date: May 27, 2017, namely for a period of 188 days (6 Months and 7 Days), with an annual simple flat interest rate of 15% if the commission fee (withdrawal or payment) is 0%.May 27 19:23 UTC (GMT)
Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 203,630,334 units (Euro, Dollar, etc.), from date: Feb 01, 2000, to date: Feb 02, 2015, namely for a period of 5,480 days (180 Months and 1 Day), with an annual simple flat interest rate of 5% if the commission fee (withdrawal or payment) is 0%.May 27 19:22 UTC (GMT)
Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 3,300 units (Euro, Dollar, etc.), from date: May 27, 2017, to date: Dec 27, 2018, namely for a period of 579 days (19 Months), with an annual simple flat interest rate of 1% if the commission fee (withdrawal or payment) is 0.3%.May 27 19:17 UTC (GMT)
Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 70,000 units (Euro, Dollar, etc.), from date: May 27, 2017, to date: Dec 27, 2017, namely for a period of 214 days (7 Months), with an annual simple flat interest rate of 1.5% if the commission fee (withdrawal or payment) is 0.3%.May 27 19:06 UTC (GMT)
Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 8,995 units (Euro, Dollar, etc.), from date: May 27, 2017, to date: Dec 27, 2017, namely for a period of 214 days (7 Months), with an annual simple flat interest rate of 1% if the commission fee (withdrawal or payment) is 0.2%.May 27 18:45 UTC (GMT)
Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 100 units (Euro, Dollar, etc.), from date: May 27, 2017, to date: Dec 27, 2017, namely for a period of 214 days (7 Months), with an annual simple flat interest rate of 1% if the commission fee (withdrawal or payment) is 0.2%.May 27 18:37 UTC (GMT)
Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 50,000 units (Euro, Dollar, etc.), from date: May 27, 2017, to date: Jun 27, 2017, namely for a period of 31 days, with an annual simple flat interest rate of 3% if the commission fee (withdrawal or payment) is 0%.May 27 17:10 UTC (GMT)
Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 44,573 units (Euro, Dollar, etc.), from date: Feb 28, 2017, to date: Feb 28, 2018, namely for a period of 365 days (12 Months), with an annual simple flat interest rate of 1% if the commission fee (withdrawal or payment) is 0%.May 27 16:41 UTC (GMT)
Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 300 units (Euro, Dollar, etc.), from date: May 27, 2017, to date: Jun 08, 2017, namely for a period of 12 days, with an annual simple flat interest rate of 24% if the commission fee (withdrawal or payment) is 0%.May 26 19:06 UTC (GMT)
Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 200 units (Euro, Dollar, etc.), from date: May 27, 2017, to date: Jun 08, 2017, namely for a period of 12 days, with an annual simple flat interest rate of 24% if the commission fee (withdrawal or payment) is 0%.May 26 19:03 UTC (GMT)
Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 200 units (Euro, Dollar, etc.), from date: May 27, 2017, to date: Jun 08, 2017, namely for a period of 12 days, with an annual simple flat interest rate of 23% if the commission fee (withdrawal or payment) is 0%.May 26 19:01 UTC (GMT)
Calculate interest earned by a principal (money initial amount lent, deposited or borrowed) of 16,450 units (Euro, Dollar, etc.), from date: Jun 25, 2017, to date: Mar 20, 2020, namely for a period of 999 days (33 Months without 5 Days), with an annual simple flat interest rate of 8.52% if the commission fee (withdrawal or payment) is 0%.May 26 17:52 UTC (GMT)


Simple flat rate interest.

Interest

  • When someone lends money to someone else, the borrower usually pays a fee to the lender. So the 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 lent or borrowed (called principal) and 3) the interest rate (the percentage of the principal charged as interest).
  • For example, for some bank deposits an interest rate of 3.5% on the principal is paid, 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) for which they are charging interest.

Annual interest rate

  • The annual interest rate, or the percentage of the principal charged as interest for one year, shows us that for an amount of 100 units (EUR Euro, USD Dollars), in a year, the interest is calculated as p% of the principal: I = p% * 100 units (EUR Euro, USD Dollars).
  • A deposit of S units generates a one year 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 interest formula:

  • I = S * p% * n

  • I = n years interest charged
  • S = initial amount (principal)
  • p% = annual 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 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 interest formula calculated for a period of n years:

  • Interest, I = S * p% * n
  • Principal, S = D / (p% * n)
  • Interest rate, p% = I / (S * n)
  • Number of years for the period, n = I / (S * p%)

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

  • Interest, I = (S * p% * d) / 365
  • Principal, S = (365 * I) / (p% * d)
  • 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 interest formula works

  • 1) Calculate the interest generated by a principal of S = 400 units in m = 5 months with an 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 interest generated by a principal of S = 400 units in m = 5 months with an 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.