Calculators
Compound interest, loan amortization, and percentage calculators.
Compound Interest Calculator
Calculate compound interest, forecast investment growth curves, and export CSV amortization schedules in browser.
Loan & Mortgage Amortization Calculator
Compute monthly mortgage payments, total interest breakdown, and detailed amortization schedules.
Multi-Scenario Percentage Calculator
Solve percentage increase/decrease, ratios, proportions, and percentage differences in real time.
Tool Selection Guide
Use Compound Interest when balances grow over periods. Use Loan Amortization when a fixed payment must retire principal and interest. Use Percentage Calculator for markups, discounts, and point-in-time ratios that are not a multi-period schedule.
Growth trajectory vs repayment schedule
Compound interest forecasts accumulation. Amortization allocates each installment between interest and principal. They answer opposite cash-flow questions and do not claim investment performance.
Multi-period models vs snapshot percents
The first two tools step through time. Percentage Calculator solves one-off proportions and does not build an amortization table.