Questions or registration help?
(608) 444-6575
•
support@powerofinterest.com
P
Power of Interest
Menu
Home
Featured Windows software
Amortization Pro
Editable schedules · $49 one-time
Reviews
About
Contact
Products
Customer Reviews
Windows software
Choose the program for the job.
View all software →
Amortization Pro
Build, edit, save, and print complete loan schedules.
Private Loan Manager
Track actual payments, balances, due dates, and year-end totals.
Loan Reconciliation & Payoff Pro
Rebuild irregular payment histories and calculate accurate payoffs.
Calculators
41 free calculators
Loans, mortgages, savings, investing, and debt.
View all calculators →
Loan & Interest
Loan & Interest
Loan Payment Calculator
Loan Payment Coupon Generator
Simple Interest Calculator
Daily Interest & Per Diem
Interest Between Dates
Payoff Per Diem Calculator
Effective Interest Rate
Interest Rate Conversion
APR & True Loan Cost
Balloon Payment Calculator
Interest-Only Loan Calculator
Rule of 78 Calculator
Construction Loan Interest
Mortgage & Payoff
Mortgage & Payoff
Loan Payoff Calculator
Extra Payment Calculator
Outstanding Loan Balance
Mortgage Payoff Calculator
Refinance Calculator
Biweekly Payment Calculator
Mortgage Per Diem Calculator
15-Year vs. 30-Year Mortgage
Buy vs. Rent Calculator
Savings & Investing
Savings & Investing
Millionaire Calculator
Investment Growth Calculator
Savings Goal Calculator
How Long to Save $10,000?
Cost of Waiting to Invest
Compound Interest Calculator
Sinking Fund Calculator
Annuity PV/FV & Payment
Retirement Savings Calculator
Emergency Fund Calculator
Net Worth Calculator
Debt & Advanced
Debt & Advanced
Debt Snowball Calculator
Debt Avalanche Calculator
Snowball vs. Avalanche
Credit Card Payoff Calculator
What Does This Loan Really Cost?
Advanced Loan Comparison
Irregular Payment Loan
Seller Financing & Balloon Note
Math
Math & formulas
Interest and loan formulas explained.
View all math →
Interest rate formulas
Daily Interest Formula
Per Diem Interest Formula
Annual Rate to Daily Rate
Annual Rate to Monthly Rate
Daily Rate to Annual Rate
Loan math
Amortization Formula
Daily Periodic Rate Formula
Rule of 78 Formula
Simple Interest Accumulation
Guides
Practical guides
Loan and amortization help.
View all guides →
Amortization guides
Formula & Worked Example
Extra Payments
Balloon Payments
Biweekly Amortization
Changing Interest Rates
Interest-Only Amortization
Refinancing a Schedule
Loan & payment guides
Loan Payoff After Irregular Payments
Loan Payment Reconciliation
Private Loan Payment Ledger
RESPA Escrow Analysis
Printable Payment Coupon Book
Seller Financing Amortization
Support
Free Trials
Buy Now
Account
Cart
1
Skip to content
Power of Interest Software Store
Cart
Checkout
My account
Sample Page
Shop
Power of Interest Software Store
Cart
Checkout
My account
Sample Page
Shop
Cart
Your cart is currently empty!
New in store
Scroll to Top