36 focused calculators for the decisions that shape your financial life. No sign-up required — your numbers stay in your browser.
Monthly Payment Breakdown
$2,506 /mo
$320,000 home at 6.5% for 30 years (incl. taxes & insurance)
Most Used
The Toolkit
Choose a tool, adjust your numbers, and see results update instantly.
01Mortgage Calculator
Estimate monthly payments, total interest, and full amortization schedule.
02Auto Loan Calculator
Calculate car payments, total cost, and interest over your loan term.
03Student Loan Calculator
Plan repayment for federal and private student loans.
04Credit Card Payoff
See how long it takes to pay off your balance and total interest.
05Debt Snowball vs Avalanche
Compare payoff strategies and find the fastest path to debt freedom.
06Loan Comparison
Compare two loans side by side to find the better deal.
07Refinance Calculator
See how much you could save by refinancing your mortgage.
08Personal Loan Calculator
Calculate monthly payments and total cost for any personal loan.
09House Affordability
Find out how much house you can afford based on income and debts.
10Payment Calculator
Calculate the monthly payment for any loan amount and term.
11HELOC Calculator
Calculate payments during draw and repayment periods.
12Auto Lease Calculator
Break down monthly lease payments with money factor and residual value.
11Compound Interest
Project investment growth with regular contributions over time.
12Retirement Calculator
Estimate your retirement savings and monthly income needs.
13Savings Goal
Find the monthly contribution needed to reach any savings target.
14401(k) Calculator
Project employer match, contributions, and growth over your career.
15Emergency Fund
Build a safety net based on your monthly expenses.
16ROI Calculator
Calculate return on investment for any asset or project.
17Future Value Calculator
Project the future value of investments with regular contributions.
18Simple Interest
Calculate simple interest on savings or loans without compounding.
19Annuity Calculator
Estimate periodic income from a lump-sum annuity investment.
20CD Calculator
Calculate certificate of deposit interest and maturity value.
21CD Ladder Calculator
Build a laddered CD strategy for better returns and liquidity.
22Margin Calculator
Analyze margin trading returns, leverage risk, and margin calls.
21Tax Calculator
Estimate federal income tax and effective tax rate.
2250/30/20 Budget
Split your income into needs, wants, and savings categories.
23Net Worth
Track assets minus liabilities to measure your financial health.
24Salary to Hourly
Convert annual salary into hourly, daily, and weekly pay rates.
31Currency Converter
Convert between world currencies with live exchange rates.
32APR to APY
Convert annual percentage rate to annual percentage yield.
33Inflation Calculator
See how inflation erodes purchasing power over time.
34Rent vs Buy
Compare the total cost of renting versus buying a home.
35Discount Calculator
Calculate sale price, savings amount, and final cost.
36Tip Calculator
Split the bill and calculate tip for any group size.
37CAGR Calculator
Calculate compound annual growth rate of investments.
38Sales Tax Calculator
Calculate sales tax and total price for any purchase amount.
FAQ
Yes, all 36 financial calculators on RatioCalc are completely free to use with no sign-up required. Results update in real-time as you type.
Our calculators use standard financial formulas and provide accurate mathematical results. However, they are for informational purposes only and should not replace professional financial advice.
APR (Annual Percentage Rate) is the annual rate charged for borrowing without compounding. APY (Annual Percentage Yield) accounts for compound interest, making it more accurate. APY is always equal to or higher than APR.
The debt snowball method prioritizes paying off the smallest balance first for psychological wins. The debt avalanche method prioritizes the highest interest rate first to minimize total interest paid.
A common guideline is to save 10-15% of your gross income for retirement. Use our 401(k) calculator and retirement calculator to estimate how much you need.
Why RatioCalc
Numbers update instantly as you type. No buttons to click, no waiting for page reloads. See your results live with animated transitions.
Every calculation runs in your browser. We never send your financial data to any server. No accounts, no tracking, no data collection.
Every calculator includes visual breakdowns with charts and graphs. Switch between summary and chart views for deeper insights.
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