All Fair Calcs calculators
Use the live tools now and follow upcoming releases. Every calculator keeps assumptions explicit and editable.
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Resale profit calculatorProfit, margin, ROI, and break-even.
Minimum offer calculatorLowest sale price that still hits your profit target.
Maximum buy price calculatorMost you can pay and stay profitable.
eBay fee calculatorEstimate eBay fees and net proceeds.
Poshmark fee calculatorHandle flat and percentage fee thresholds.
Mercari fee calculatorModel net proceeds after fees and costs.
Etsy profit calculatorInclude listing, transaction, and processing fees.
Mortgage calculatorMonthly payment and amortization estimates.
Retirement savings calculatorEstimate target balance and contribution gap.
Savings rate calculatorMeasure savings as a share of income.
Loan payoff calculatorCompare standard and accelerated payoff timelines.
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Debt Payoff Calculator - Debt Free Date and Interest SavedEstimate your debt free date and total interest paid with minimum payments and extra-payoff scenarios.Credit Card Payoff Calculator - Minimum vs Extra PaymentEstimate how long credit card debt takes to pay off and how extra monthly payments reduce interest.Emergency Fund Calculator - Target Amount and TimelineEstimate how much emergency savings you need and how long it will take to build your target fund.Compound Interest Calculator - Growth Over TimeEstimate how savings and investments grow over time with compounding, contributions, and return assumptions.Investment Return Calculator - Annualized and Total ReturnEstimate total and annualized returns for investments with contributions and holding periods.Net Worth Calculator - Assets Minus LiabilitiesCalculate net worth by comparing total assets and liabilities with a clear category breakdown.Budget Calculator - Monthly Income and Expense PlanEstimate monthly cash flow and create a practical spending plan from income, fixed costs, and savings targets.Rent vs Buy Calculator - Housing Cost ComparisonEstimate long-term housing costs to compare renting versus buying under different assumptions.Refinance Calculator - Break-Even and Interest SavingsEstimate mortgage refinance break-even timing and total interest savings after closing costs.