interest calc formula?
925303
the formula for compound interest yearly is\n\nA=P(1+r/n)^(rn)\n\nwhere\nA=final amount\nP=Initial amount\nr=rate in deciamals\nn=number of times coumponded yearly \nMontly=12,quartely=4,daily=365.....
672493
IRR=PV/(1+K)^n=0\n\nPV=Present Value of the Investment\nK=Rate of interest in\nn=number of years
297329
one formula you can use is\n\nF = P(1 + i)^n\nwhere,\n\nF = future worth of the money\nP = present worth of the money\ni = interest rate\nn = number of years\n\nsince the future worth of the money will be twice of the present worth, then we can say that,\n\nF = 2P\n\nusing this in the formula you'll come up with,\n\n-> 2P = P(1 + i)^n  \n(divide the whole equation by P)\n-> 2 = (1 + i)^n \n(n is 20 years)\n-> 2 = (1 + i)^20\n(raising the whole equation by 1/20)\n-> 2^(1/20) = 1 + i\n-> 1.035264 = 1 + i\n-> i = 0.035264\n-> i = 3.5264%
895432
Actually Excel has a number of built in formulas to figure stuff like compound interest. However, to find the interest rate you would use  the RATE formula:\n\nRATE(Number of payments, Payment, -Amount)\n\nFor example, if you were financing a car over 5 years, $500/month, 20,000 it would look like this:\n\nRATE(60, 500, -20000)
844754
I = Prt, \nwhere  I = interest, P = principal, r = interest rate and t = number of years\nP = 770, r = 3% = .03 and t = 9\nI = 770(.03)(9)\nI = 207.90
942252
Capital = Initial capital * (1+r)^n, \nwhere \nr = interest rate  per period\nn is number of periods
990026
You want to find how long the contract is for.  Using the compound interest formula,\nA(t) = A (1+r/n)^(nt) where A(t) is final value, A is starting value, r is interest rate, n is number of times interest is counted in a year, t is number of years. In this case we want to figure t.  Thus,\n\n(15000+1684.65) = 15000(1+.074/2)^(2)(t)\n16684.65 = 15000(1+.074/2)^(2)(t)\n16684.65/15000 = (1+.074/2)^(2)(t)\n1.11231 = (1+.074/2)^(2)(t)\n1.11231 = (1.037)^(2t)\nln (1.11231) = (2t) ln (1.037) \n2t = ln (1.11231) /ln (1.037) \n2t = 2.93\nt = 2.93/2 \nt = 1.47 \nSo the term of the contract is 1.47 years or almost one and half year.
115696
Considering annual coupon payment, it works out to be 6%.\nFormula is    Rate of Interest = (Interest X 10) / (Principal X No. of years)  = 6000/1000 = 6\n\nReal rate of return = Nominal return - inflation rate\nwork out ... results will be 4,2,0,-2
1059111
use future value calculators (on the web). also excel programs have financial functions section.\nin the interest rate divide it by 12..\nso, 10% annual = 10/12% per months. 15 month, $326 per month.. in your example, the future  value would be $5185.81...if you want to find the interest portion then subtract 326*15-5185.81 = $295.81
384859
I = Prt\nwhere I is the interest, P is the principal, r is the interest rate, and t is the time (in years)
39368
Compound Interest= Principal Amount{1+(rate of intersest/100)^Numebr of years}\nFor you it will be\n21000=5000*(1+r/100)^5\n=>4.2=(1+r/100)^5\n=>1.33=1+r*0.01\n=>r=33%
1072634
There are 2 types of interests, simple and compound. My assumption is you are talking about simple interest. In simple interest, the interest remains the same over the time period, in compound interest, the interest increases. \n\n For simple interest, this are the things you need.\n I = the interest.\n r= rate (in percentage)\n t= time frame (mostly per annum)\n p= principal amount\n\nthe formula is\n I = (p x rx t) / 100 \n solving for r gives you this results,\n\nr = (100 x I) / (p x t) \n\n This is for general Maths. For specific fields, you'll have to check    for it in that field, or you'll have to mention it.\n \n Take care.
653412
(future value/present value)^(1/time)\n\nSo using your example, (200,000/$100,000)^(1/5) or the fifth root of 2, which is 1.148698 or 14.8698%.\n\nTo use your example, 1.148698 x 1.148698 x 1.148698 x 1.148698 x 1.148698 =2\n\nJust be careful with your units of time.  If you had found the monthly rate, you could not multiply it by twelve to find the annual rate, you would take it to the twelth power.\n\nOne simpler method, that is approximately correct is the rule of 72.  You can estimate most rates by dividing 72/time.  In this case it would give you 14.4.  It comes in handy when you don't have a calculator on hand.  See the wikipedia article on why it works.
1093368
Go to mortgages.interest.com\nClick on calculator link on the left\nThey have different types of calculators including a comparison of 15 and 30 year mortgages.
99025
Actually the answer provided by bluhawaii is incorrect.  It is only a "simple interest formula".  It does not take into account the compounding effect that occurs from the 5% raise being tacked on every year the 17 years.  Here are the correct numbers!\nYearEnd - Amount\n1- $52,500 \n2- $55,125 \n3- $57,881.25 \n4- $60,775 \n5- $63,814.08 \n6- $67,005 \n7- $70,355.02 \n8-$73,873 \n9-$77,566.41 \n10-$81,445 \n11-$85,516.97 \n12-$89,793 \n13-$94,282.46 \n14-$98,997 \n15-$103,946.41 \n16-$109,144 \n17-$114,600.92
1007576
amount of interest and principal \nthat is paid in a given year.
706748
Is 7% the annual interest rate?  If so, then over 60 days, that interest rate would be 7% * 60/365 = apx. 1.15%.  Divide your interest earned by that interest rate to determine your principal:\n\n54,509 / .01150685 = $4,737,091