Free Financial Calculators with Clear Formulas
CalcPrime provides browser-based calculators for auto financing, mortgages, debt payoff, saving, investing, retirement, budgeting, income, inflation, and small-business planning. Each priority page explains its major assumptions and calculation method.
Popular calculators
Auto Loan CalculatorEstimate a monthly car payment, total interest, and total loan cost using vehicle price, down payment, APR, and loan term.Mortgage Payment Calculator with Interest EstimateEstimate a monthly mortgage principal-and-interest payment and compare home price, down payment, rate, and loan term scenarios.Compound Interest Calculator for Savings GrowthEstimate future savings with an initial deposit, recurring contributions, rate of return, compounding frequency, and time horizon.Credit Card Payoff CalculatorEstimate how long a credit-card balance may take to repay and how much interest may be paid at a fixed monthly payment.Monthly Budget CalculatorBuild a monthly budget by comparing take-home income with housing, transportation, food, debt, savings, and other expenses.Savings Goal CalculatorEstimate the recurring deposit needed to reach a savings target using current balance, goal amount, interest rate, and deadline.
Browse calculator categories
Auto CalculatorsCompare vehicle financing and leasing scenarios with free auto-loan, lease, and incentive calculators.Mortgage CalculatorsEstimate mortgage payments, affordability, amortization, refinancing, extra payments, and rent-versus-buy scenarios.Credit Card CalculatorsPlan credit-card payoff, compare balance transfers, and organize a debt-snowball strategy.Loan and Debt CalculatorsEstimate personal-loan payments and compare debt payoff or consolidation scenarios.Investment CalculatorsEstimate compound growth, recurring investment scenarios, ROI, and CAGR.Savings CalculatorsSet a savings target and estimate an appropriate emergency-fund reserve.Retirement CalculatorsProject retirement savings and estimate 401(k) growth using adjustable assumptions.Budgeting CalculatorsBuild a budget, estimate debt-to-income ratio, and track net worth.Income CalculatorsConvert hourly pay to an estimated weekly, monthly, and annual gross salary.Business Finance CalculatorsCalculate profit margin, markup, and break-even sales volume.Inflation CalculatorsEstimate future prices and the purchasing-power effect of inflation.
Private, scenario-based estimates
Use the tools to compare possibilities, then verify important figures with original statements, contracts, disclosures, and qualified professionals. Do not enter sensitive personal identifiers or account credentials.
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