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Numberridge.

All Calculators

Every calculator is free, works instantly in your browser, and requires no sign-up.

Mortgage

Mortgage Calculator

Full PITI payment, PMI, total interest, payoff date and a year-by-year amortization schedule.

Investing

Compound Interest Calculator

Project growth from a lump sum plus recurring contributions, with real (inflation-adjusted) values.

Savings

Savings Goal Calculator

Work backwards from a goal: required monthly deposit, shortfall, and progress toward the target.

Loans & Debt

Loan Calculator

Monthly payment and true total cost for any fixed-rate installment loan, including extra payments.

Investing

Inflation Calculator

Convert any dollar amount between 1913 and 2026 using official CPI-U data, with average annual inflation.

Retirement

401(k) Calculator

Project your 401(k) balance with employer match, salary raises and compound growth — and see what the match is worth.

Retirement

Roth IRA Calculator

See tax-free compounding on Roth IRA contributions versus the same money in a taxable account.

Loans & Debt

Credit Card Payoff Calculator

How long to clear a card balance at your payment level, what it costs, and what minimum payments really do.

Income

Salary to Hourly Calculator

Convert any salary to hourly rate — or the reverse — with hours per week and paid time off factored in.

Savings

APY Calculator

Convert nominal rates to true effective annual yield (APY) and project deposit growth at any frequency.

Everyday

Currency Converter

Convert between major world currencies using an indicative mid-market rate snapshot, with cross rates.

Retirement

Retirement Planner

Project your nest egg at retirement, what it pays under the 4% rule, and whether it covers your target income.