Simple (Flat Rate) Interest Calculator: Calculate the Annual Simple (Flat) Interest Rate of an Invested Amount of Money (Principal, Initial Starting Amount Lent, Deposited or Borrowed) To Produce a Certain Sum of Money by the Investment Duration Period and Transaction Fee

Calculator: annual simple interest rate to negociate to earn a certain amount

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

The latest calculated annual simple (flat) interest rates

Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 5,500 units (Dollar, Euro, Pound, etc.) to produce an amount of 59.4 units, for a period of 986 days (32 Months and 11 Days). The transaction fee is 240%. Apr 08 13:42 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 106,618 units (Dollar, Euro, Pound, etc.) to produce an amount of 832 units, for a period of 376,888 days (12,382 Months and 19 Days). The transaction fee is 0.2%. Jan 23 13:03 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 9,813 units (Dollar, Euro, Pound, etc.) to produce an amount of 94 units, for a period of 583,293 days (19,164 Months). Jan 23 13:03 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 455,470 units (Dollar, Euro, Pound, etc.) to produce an amount of 194 units, for a period of 604,842 days (19,872 Months). Jan 23 13:03 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 559,577,838,411 units (Dollar, Euro, Pound, etc.) to produce an amount of 145 units, for a period of 658,714 days (21,642 Months). Jan 23 13:03 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 373,033,216,751 units (Dollar, Euro, Pound, etc.) to produce an amount of 96 units, for a period of 658,714 days (21,642 Months). Jan 23 13:03 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 689,447 units (Dollar, Euro, Pound, etc.) to produce an amount of 130 units, for a period of 604,842 days (19,872 Months). Jan 23 13:02 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 85,943 units (Dollar, Euro, Pound, etc.) to produce an amount of 662 units, for a period of 542,719 days (17,831 Months). Jan 23 13:02 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 24,914 units (Dollar, Euro, Pound, etc.) to produce an amount of 678 units, for a period of 403,061 days (13,243 Months without 14 Days). The transaction fee is 1%. Jan 23 13:02 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 1,741 units (Dollar, Euro, Pound, etc.) to produce an amount of 1,165 units, for a period of 444,835 days (14,615 Months). The transaction fee is 28%. Jan 23 13:02 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 111,221 units (Dollar, Euro, Pound, etc.) to produce an amount of 1,000,000,000,000 units, for a period of 416,011 days (13,668 Months). Jan 23 13:02 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 21,923 units (Dollar, Euro, Pound, etc.) to produce an amount of 634 units, for a period of 403,061 days (13,243 Months without 14 Days). The transaction fee is 1%. Jan 23 13:02 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 92,411 units (Dollar, Euro, Pound, etc.) to produce an amount of 674 units, for a period of 542,719 days (17,831 Months). Jan 23 13:02 UTC (GMT)
All the annual simple flat interest rates calculated by users


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

Annual simple flat rate interest 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 of the simple flat interest rate applied on the principal - initial starting amount of money lent, deposited or borrowed, in order to earn a simple flat annual rate:

  • p% = I ÷ (S × n)

Examples of how to calculate the simple flat interest rate on the principal amount in order to earn a certain simple flat rate interest:

  • 1) What is the simple flat interest rate of the principal S = 20,000 units 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?
    Answer:
    p% = I ÷ (S × n) = 3,500 ÷ (20,000 × 5) = 3,500 ÷ 100,000 = 3.5 ÷ 100 = 3.5%
  • 2) What is the simple flat interest rate of a principal S = 5,000 units, 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?
    Answer:
    p% = I ÷ (S × n) = 300 ÷ (5,000 × 3) = 300 ÷ 15,000 = 3 ÷ 150 = 1 ÷ 50 = 2 ÷ 100 = 2%

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

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

Formula of the simple flat interest rate of the principal for an annual simple flat rate interest calculated for a period of m months:

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

Formula of the simple flat interest rate of a principal for an annual simple flat rate interest calculated for a period of d days:

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

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

  • 1) Calculate the simple flat interest rate of the initial amount S = 400 units that would generate a simple flat rate interest I = 6.67 units in m = 5 months.
    Answer:
    p% = (12 × I) ÷ (S × m) = (12 × 6.67) ÷ (400 × 5) = (12 × 6.67) ÷ 2,000 = 80 ÷ 2,000 = 4%
  • 2) Calculate the simple flat interest rate of the initial amount S = 400 units that would generate a simple flat rate interest I = 7.5 units in m = 5 months.
    Answer:
    p% = (12 × I) ÷ (S × m) = (12 × 7.5) ÷ (400 × 5) = 90 ÷ 2,000 = 4.5%.