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 125,132 units (Dollar, Euro, Pound, etc.) to produce an amount of 156 units, for a period of 617,899 days (20,301 Months). Nov 20 12:43 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 512,199,738,505 units (Dollar, Euro, Pound, etc.) to produce an amount of 129 units, for a period of 658,714 days (21,642 Months). Nov 20 12:43 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 996 units (Dollar, Euro, Pound, etc.) to produce an amount of 829 units, for a period of 403,073 days (13,243 Months without 2 Days). The transaction fee is 1%. Nov 20 12:43 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 456 units (Dollar, Euro, Pound, etc.) to produce an amount of 296 units, for a period of 444,835 days (14,615 Months). The transaction fee is 246%. Nov 20 12:42 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 18,102 units (Dollar, Euro, Pound, etc.) to produce an amount of 491 units, for a period of 403,061 days (13,243 Months without 14 Days). The transaction fee is 1%. Nov 20 12:42 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 68,613 units (Dollar, Euro, Pound, etc.) to produce an amount of 102 units, for a period of 417,472 days (13,716 Months). Nov 20 12:42 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 21,014 units (Dollar, Euro, Pound, etc.) to produce an amount of 84 units, for a period of 584,083 days (19,190 Months). Nov 20 12:42 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 580,539 units (Dollar, Euro, Pound, etc.) to produce an amount of 155 units, for a period of 604,842 days (19,872 Months). Nov 20 12:42 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 448,070,360,516 units (Dollar, Euro, Pound, etc.) to produce an amount of 127 units, for a period of 658,714 days (21,642 Months). Nov 20 12:42 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 967,334 units (Dollar, Euro, Pound, etc.) to produce an amount of 193 units, for a period of 604,842 days (19,872 Months). Nov 20 12:42 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 7,116 units (Dollar, Euro, Pound, etc.) to produce an amount of 184 units, for a period of 403,694 days (13,263 Months and 9 Days). The transaction fee is 456%. Nov 20 12:42 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 12,031 units (Dollar, Euro, Pound, etc.) to produce an amount of 279 units, for a period of 666,020 days (21,882 Months). The transaction fee is 532%. Nov 20 12:42 UTC (GMT)
Calculate the simple (flat) interest rate of the invested amount (principal, initial starting amount of money lent, deposited or borrowed), of 77,767 units (Dollar, Euro, Pound, etc.) to produce an amount of 591 units, for a period of 376,888 days (12,382 Months and 19 Days). The transaction fee is 0.2%. Nov 20 12:42 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%.