Free Finance Calculators
Calculate savings goals, APY, CD interest, ROI, CAGR, future value, present value, budget percentages, debt payoff, DTI, credit card payoff, inflation, salary conversion, hourly pay conversion, loan payments, mortgage estimates, auto loans, and repayment scenarios with fast tools that show both the result and the formula behind it.
Live finance calculators
Savings and investing
Compound Interest Calculator
Project future value, total deposits, and interest earned with recurring monthly contributions and compounding controls.
Open calculatorInterest formulas
Simple Interest Calculator
Calculate interest and final value using the simple interest formula for loans, savings notes, and classroom examples.
Open calculatorLoans
Loan Payment Calculator
Estimate monthly payments, total interest, and payoff cost for fixed-rate personal loans and installment plans.
Open calculatorLoans
Mortgage Payment Calculator
Plan home loan payments with principal, interest, property tax, insurance, HOA, and down-payment assumptions.
Open calculatorLoans
Auto Loan Calculator
Calculate vehicle payments after price, down payment, trade-in value, tax, fees, APR, and repayment term.
Open calculatorLoans
Amortization Schedule Calculator
Create a repayment schedule with yearly principal, interest, balance, and optional extra-payment savings.
Open calculatorSavings
APY Calculator
Convert nominal annual rates and compounding schedules into annual percentage yield for savings comparisons.
Open calculatorSavings
Savings Goal Calculator
Find the monthly amount needed to reach a target balance by a chosen date or savings horizon.
Open calculatorSavings
CD Interest Calculator
Estimate certificate of deposit maturity value, interest earned, effective APY, and early withdrawal impact.
Open calculatorSavings
Emergency Fund Calculator
Calculate an emergency fund target, savings gap, coverage months, and time to goal from monthly expenses.
Open calculatorInvesting
ROI Calculator
Calculate return on investment from initial cost, ending value, cash flows, fees, and holding period.
Open calculatorInvesting
CAGR Calculator
Calculate compound annual growth rate, total growth, and absolute change between beginning and ending values.
Open calculatorInvesting
Future Value Calculator
Project present value, monthly contributions, rate, and compounding assumptions into a future balance.
Open calculatorInvesting
Present Value Calculator
Discount a future amount back to today with rate, timeline, compounding frequency, and discount factor.
Open calculatorBudget & Debt
Budget Percentage Calculator
Convert budget categories into percentages of monthly income and flag remaining or over-budget cash flow.
Open calculatorBudget & Debt
Debt Payoff Calculator
Estimate debt-free time and interest cost with snowball or avalanche payoff ordering.
Open calculatorBudget & Debt
Debt-to-Income Ratio Calculator
Calculate front-end and back-end DTI from gross income, housing payment, and monthly debt obligations.
Open calculatorBudget & Debt
Credit Card Payoff Calculator
Estimate credit card payoff time, interest cost, and three-year payment target from APR and payments.
Open calculatorIncome & Inflation
Inflation Calculator
Calculate future cost, cumulative inflation, buying power, and annual projection from rate and time.
Open calculatorIncome & Inflation
Salary to Hourly Calculator
Convert annual salary into hourly pay, pay-period amounts, scheduled hours, and PTO-adjusted rate.
Open calculatorIncome & Inflation
Hourly to Salary Calculator
Convert hourly wage, regular hours, overtime, paid weeks, and unpaid time off into annual pay.
Open calculatorPractical money questions these tools support
Savings planning
Model balances, contributions, interest earned, and time horizons before you commit to a monthly savings plan.
Debt and borrowing clarity
Understand how principal, rate, term, budget room, and payoff strategy influence debt decisions.
Income and value context
Compare pay conversion, inflation, ROI, CAGR, future value, and present value assumptions before using a projection.
Finance formulas covered by the live calculator set
| Family | Formula | Used by |
|---|---|---|
| Compound growth | FV = P(1 + r/n)^(nt) + contributions | Compound interest, future value, savings goal, CD interest |
| Loan payment | PMT = P x i(1+i)^n / ((1+i)^n - 1) | Loan payment, mortgage, auto loan, amortization schedule |
| Return | ROI = (gain - cost) / cost; CAGR = (ending/beginning)^(1/years) - 1 | ROI, CAGR, investment comparison |
| Cash-flow pressure | DTI = monthly debt payments / gross monthly income | Debt-to-income ratio, budget, debt payoff, mortgage context |
| Purchasing power | adjusted value = amount x (ending index / starting index) | Inflation and salary comparison context |
External references for finance assumptions
Finance tools for planning, teaching, and quick checks
Personal finance
Estimate savings growth, compare interest assumptions, and prepare rough planning numbers before meeting a financial professional.
Classroom examples
Use clear formulas and live inputs when teaching simple interest, compounding, savings behavior, and rate comparisons.
Business planning
Run quick scenarios for cash reserves, interest-bearing accounts, repayment schedules, and early budget assumptions.
How it works in three quick steps.
Pick the finance question
Choose the calculator that matches the decision: compounding growth, simple interest, savings goals, investment return, loan payments, or another finance workflow.
Enter realistic assumptions
Add principal, rate, time, contribution, or term values. The live calculators update immediately so you can compare scenarios quickly.
Review and share the result
Use the formula, formatted summary, and print-friendly output to support planning, homework, or a discussion with a qualified advisor.
Finance calculations with clear assumptions
Finance calculators are most useful when they make assumptions visible. A final balance, interest total, or payment estimate can look authoritative even when the inputs behind it are rough. This hub is designed to keep that context close to the result. The calculators use labeled inputs, accessible controls, and formatted outputs so users can understand how principal, rate, time, contribution timing, compounding frequency, investment return, discount rates, inflation assumptions, salary hours, overtime rules, loan term, budget categories, DTI, card APR, and extra-payment assumptions affect the answer. The pages also include formula notes and practical explanations that support classroom learning, household planning, and early business analysis.
These calculators are not a substitute for professional financial advice, tax advice, lending disclosures, or investment planning. They are calculation tools that help users build a first estimate, compare scenarios, and ask better questions. The interest tools explain saving and rate formulas, the investment tools handle return and time-value questions, the income tools compare salary, hourly pay, and inflation pressure, the budget tools check cash-flow pressure, and the loan tools estimate fixed payments, home loan cost, car financing, and amortized repayment paths. As new finance tools are added, this hub will continue to organize them by intent so visitors can move from a broad money question to the exact calculator page without landing on unrelated content.