Calculator: calculate the amount of initial money to be lent, deposited or borrowed (principal) in order to earn a simple flat rate due interest by the interest rate, duration and additional transaction fees (withdrawal, payment in advance)

Calculate principal amount to invest to get a certain simple flat rate interest

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

Latest calculated initial amounts of money (principal) for earning certain simple flat rate interest values

Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 2,874.06 units (Dollar, Euro, Pound, etc.), from date: Oct 01, 2018, to date: Oct 31, 2018, namely for a period of 30 days, with an annual simple flat interest rate of 7% if the commission fee (withdrawal or payment) is 0%. Sep 16 02:38 UTC (GMT)
Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 200 units (Dollar, Euro, Pound, etc.), from date: Apr 16, 2019, to date: May 16, 2019, namely for a period of 30 days, with an annual simple flat interest rate of 2% if the commission fee (withdrawal or payment) is 0%. Sep 16 02:32 UTC (GMT)
Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 200 units (Dollar, Euro, Pound, etc.), from date: Jan 01, 2006, to date: Dec 31, 2008, namely for a period of 1,095 days (35 Months and 30 Days), with an annual simple flat interest rate of 2% if the commission fee (withdrawal or payment) is 0%. Sep 16 01:58 UTC (GMT)
Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 100,000 units (Dollar, Euro, Pound, etc.), from date: May 15, 2019, to date: May 15, 2020, namely for a period of 366 days (12 Months), with an annual simple flat interest rate of 5.48% if the commission fee (withdrawal or payment) is 0%. Sep 16 01:55 UTC (GMT)
Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 140,000 units (Dollar, Euro, Pound, etc.), from date: Apr 29, 2018, to date: May 29, 2025, namely for a period of 2,587 days (85 Months), with an annual simple flat interest rate of 9% if the commission fee (withdrawal or payment) is 0%. Sep 16 01:41 UTC (GMT)
Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 1.75 units (Dollar, Euro, Pound, etc.), from date: Jul 06, 2016, to date: Jul 06, 2017, namely for a period of 365 days (12 Months), with an annual simple flat interest rate of 75,413.18% if the commission fee (withdrawal or payment) is 0%. Sep 16 01:29 UTC (GMT)
Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 6 units (Dollar, Euro, Pound, etc.), from date: Mar 22, 2019, to date: Apr 22, 2019, namely for a period of 31 days, with an annual simple flat interest rate of 2,000,000% if the commission fee (withdrawal or payment) is 0%. Sep 16 01:20 UTC (GMT)
Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 200 units (Dollar, Euro, Pound, etc.), from date: May 15, 2019, to date: Dec 15, 2019, namely for a period of 214 days (7 Months), with an annual simple flat interest rate of 2% if the commission fee (withdrawal or payment) is 0%. Sep 16 01:11 UTC (GMT)
Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 7.471 units (Dollar, Euro, Pound, etc.), from date: Dec 20, 2012, to date: Dec 31, 2018, namely for a period of 2,202 days (72 Months and 11 Days), with an annual simple flat interest rate of 2% if the commission fee (withdrawal or payment) is 0%. Sep 16 01:08 UTC (GMT)
Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 200 units (Dollar, Euro, Pound, etc.), from date: May 15, 2019, to date: Oct 15, 2019, namely for a period of 153 days (5 Months), with an annual simple flat interest rate of 2% if the commission fee (withdrawal or payment) is 0%. Sep 16 01:06 UTC (GMT)
Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 200 units (Dollar, Euro, Pound, etc.), from date: Mar 08, 2019, to date: May 08, 2019, namely for a period of 61 days (2 Months), with an annual simple flat interest rate of 2% if the commission fee (withdrawal or payment) is 0%. Sep 16 01:03 UTC (GMT)
Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 200 units (Dollar, Euro, Pound, etc.), from date: Mar 08, 2019, to date: May 08, 2019, namely for a period of 61 days (2 Months), with an annual simple flat interest rate of 2% if the commission fee (withdrawal or payment) is 0%. Sep 16 01:02 UTC (GMT)
Calculate the principal, initial money amount lent, deposited or borrowed in order to earn a due interest of 2,000 units (Dollar, Euro, Pound, etc.), from date: Dec 15, 2017, to date: Jan 15, 2018, namely for a period of 31 days, with an annual simple flat interest rate of 2% if the commission fee (withdrawal or payment) is 0%. Sep 16 00:40 UTC (GMT)
All initial amounts of money calculated by users for earning certain simple flat rate interest values


How to calculate the principal - initial amount of money lent, deposited or borrowed in order to collect or pay a simple flat rate due interest by the interest rate, duration and additional fees (transaction fee as withdrawal, payment in advance, etc.).

Annual simple flat rate interest calculation formula:

  • I = S × p% × n

  • I = n years simple 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

  • Formula for the principal - initial amount of money lent, deposited or borrowed in order to produce a simple flat annual rate:

  • S = I ÷ (p% × n)

Examples of how to calculate the initial amount, the principal, to earn a certain simple flat rate interest:

  • 1) What is the principal that has to be lent, deposited or borrowed for a period of n = 5 years if the simple flat rate interest collected or paid D = 3,500 units, for an annual simple flat interest rate (percentage) p% = 3.5%?
    Answer:
    S = I ÷ (p% × n) = 3,500 ÷ (3.5% × 5) = 3,500 ÷ (3.5/100 × 5) = (3,500 × 100) ÷ (3.5 × 5) = 350,000 ÷ 17.5 = 20,000 units
  • 2) What is the principal that has to be lent, deposited or borrowed for a period of n = 3 years if the simple flat rate interest collected or paid D = 300 units, for an annual simple flat interest rate p% = 2%?
    Answer:
    S = I ÷ (p% × n) = 300 ÷ (2% × 3) = 300 ÷ (2/100 × 3) = (300 × 100) ÷ (2 × 3) = 30,000 ÷ 6 = 5,000 units

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

  • Principal, S = I ÷ (p% × n)
  • Simple interest, I = S × p% × n
  • Simple flat interest rate, p% = I ÷ (S × n)
  • Number of years for the period of the deposit, lending or borrowing, n = I ÷ (S × p%)

The principal formula for earning an annual simple flat rate interest calculated for a period of m months:

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

The principal formula for earning an annual simple flat rate interest calculated for a period of d days:

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

More examples of how to calculate the principal for earning a simple flat rate interest:

  • 1) Calculate the initial amount S that would generate a simple flat rate interest I = 6.67 units in m = 5 months with a simple interest rate of p% = 4%.
    Answer:
    S = (12 × I) ÷ (p% × m) = (12 × 6.67) ÷ (4% × 5) = (12 × 6.67) ÷ (4/100 × 5) = (100 × 12 × 6.67) ÷ (4 × 5) = (100 × 12 × 6.67) ÷ 20 = 5 × 12 × 6.67 = 400.2 ≈ 400 units
  • 2) Calculate the initial amount that would earn a simple flat rate interest I = 7.5 units in m = 5 months with a simple flat interest rate of p% = 4.5%.
    Answer:
    S = (12 × I) ÷ (p% × m) = (12 × 7.5) ÷ (4.5% × 5) = (100 × 12 × 7.5) ÷ (4.5 × 5) = (100 × 12 × 7.5) ÷ 22.5 = 9,000 ÷ 22.5 = 400 units.