Debt & Business Calculators
From managing personal debt to running business financial analysis, these 16 calculators cover the numbers that matter most. Build a debt payoff plan using avalanche or snowball strategies. Figure out how long it takes to pay off credit card balances at your current payment rate. Calculate ROI and IRR for investment decisions, set the right profit margins, and convert currencies for international transactions. Whether you are a freelancer setting your hourly rate, an investor tracking stock and crypto returns, or someone pursuing FIRE (Financial Independence, Retire Early), you will find the right tool here. Every calculator is free, works instantly in your browser, and gives you results you can act on.
Debt Management
Tools to plan and accelerate your debt payoff.
Debt Payoff Calculator
Build a payoff plan with avalanche or snowball method.
Credit Card Payoff Calculator
See how long to pay off a balance and total interest cost.
Debt Consolidation Calculator
Compare consolidating multiple debts into one payment.
Debt-to-Income Calculator
Calculate your DTI ratio used by lenders for loan approval.
Business & Investment
ROI, margins, returns, and valuation tools for business decisions.
ROI Calculator
Measure return on investment as a percentage or annualized rate.
IRR Calculator
Find the internal rate of return for a series of cash flows.
Margin Calculator
Calculate profit margin, markup, and cost from revenue.
Depreciation Calculator
Compute straight-line and declining-balance depreciation.
Freelancer Rate Calculator
Set your hourly or project rate based on income goals and expenses.
Inflation Calculator
See how inflation erodes purchasing power over time.
Everyday Money
Discounts, tips, currency, and investment return tools.
Discount Calculator
Find the sale price after applying a percentage discount.
Tip Calculator
Split bills and calculate tips for any group size.
Currency Converter
Convert between world currencies at current exchange rates.
Stock Return Calculator
Calculate total stock return including dividends and growth.
Crypto Profit Calculator
Track profit or loss on cryptocurrency investments.
FIRE Calculator
Find when you can reach financial independence and retire early.
Frequently Asked Questions
How do I create a debt payoff plan?
Enter all your debts with balances, interest rates, and minimum payments into a debt payoff calculator. Choose between the avalanche method (highest interest first) or snowball method (smallest balance first). The calculator builds a month-by-month payoff schedule showing when each debt is eliminated and how much total interest you will pay.
What is ROI and how is it calculated?
ROI (Return on Investment) measures the gain or loss on an investment relative to its cost. The formula is (Net Profit / Cost of Investment) x 100. A positive ROI means the investment earned more than it cost. Our calculator handles multiple scenarios including annualized ROI for comparing investments of different durations.
What is the FIRE number and how do I calculate it?
FIRE (Financial Independence, Retire Early) is a target savings amount that lets you live off investment returns. The standard formula is 25 times your annual expenses, based on a 4% safe withdrawal rate. Our FIRE calculator factors in your current savings, income, expenses, and expected returns to estimate when you can reach financial independence.
How do I calculate profit margin for my business?
Profit margin is (Revenue - Cost) / Revenue x 100. Gross margin uses cost of goods sold, while net margin includes all expenses. Our margin calculator handles both, plus markup calculations, so you can price products correctly and understand your true profitability.