Finance calculators
Loans, compounding, paychecks, freelance rates, margins, and tips.
14 calculators
Amortization Loan Calculator
Calculate a fixed monthly payment and its first-month interest and principal split for a fully amortizing fixed-rate loan. Use the calculator above.
APR Calculator
Estimate the effective annual financing rate when upfront fees reduce the cash you receive but payments are based on the stated loan principal.
Churn Rate & MRR Leakage Calculator
Calculate logo churn and net-new monthly recurring revenue to separate customer loss from revenue movement in a simple SaaS health check.
Compound Interest Calculator
Project future value of a lump-sum deposit with compound interest—compare rate, compounding frequency, and term with clear worked scenarios.
Crypto Staking & Yield APY Estimator
Project a staking balance after repeated quoted-yield compounding and subtract stated fees, while keeping token-price and protocol risk outside the math.
Freelance Rate Calculator
Turn a desired annual profit, operating expenses, tax or contingency buffer, and expected billable hours into a target hourly freelance rate.
IRR Calculator
Solve the internal rate of return for an upfront investment followed by equal periodic cash inflows over a fixed number of periods.
Margin Calculator
Calculate gross margin, markup, cost, or selling price while keeping clear that margin and markup use different denominators. Use the calculator above.
NPV Calculator
Discount equal periodic cash inflows and subtract an upfront investment to estimate net present value at a chosen required return.
Paycheck Tax Deductions Calculator
Estimate net paycheck and amount withheld by applying one combined deduction percentage to gross pay for quick personal budgeting.
Rent vs Buy Opportunity Cost Calculator
Compare total rent paid with a simplified buyer cash-out estimate over a chosen horizon using down payment, mortgage rate, appreciation, and sale costs.
SaaS LTV to CAC Ratio Calculator
Estimate gross-margin customer lifetime value and compare it with customer acquisition cost to create a transparent SaaS unit-economics ratio.
Salary to Hourly Calculator
Convert annual salary to hourly wage or an hourly wage to annual pay using your own weekly schedule and paid weeks per year. Use the calculator above.
Tip Calculator
Calculate gratuity, total bill, and an equal per-person share from a bill amount, tip percentage, and party size before rounding payment.