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Financial Calculators

Model a mortgage, size up a loan, or map out retirement in seconds. Sixty-plus money tools, zero spreadsheets, always free.

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Mortgage & Real Estate

19 calculators

Mortgage Calculator

POPULAR

Full monthly payment breakdown — principal, interest, taxes, insurance, PMI, and HOA.

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Amortization Calculator

See exactly how each payment splits between principal and interest, month by month.

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Mortgage Amortization

NEW

A lean amortization-only view of a mortgage, with a monthly/annual schedule and extra-payment savings.

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Canadian Mortgage Calc

NEW

Semi-annual compounding, CMHC insurance, and bi-weekly payment options for a Canadian mortgage.

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UK Mortgage Calculator

NEW

Repayment or interest-only payments plus a full Stamp Duty Land Tax breakdown.

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Mortgage Payoff Calculator

Find your new payoff date and interest saved by adding extra principal payments.

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Home Equity Loan Calculator

NEW

Estimate your borrowing limit and fixed monthly payment against your home's equity.

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HELOC Calculator

NEW

Model draw-period interest and repayment-period payments on a home equity line of credit.

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House Affordability Calculator

Work backward from income and monthly budget to a realistic home price range.

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Refinance Calculator

Weigh a new rate and closing costs against your current loan to find your break-even point.

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Down Payment Calculator

See how different down payment amounts change your loan size, PMI, and payment.

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Rent vs Buy Calculator

Compare the true long-run cost of renting against owning in your market.

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Real Estate Calculator

Cap rate, cash-on-cash return, and appreciation estimates for a property purchase.

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Rental Property Calculator

Project net cash flow and ROI on a rental after expenses, vacancy, and financing.

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APR Calculator

Roll fees and points into your rate to see the true annual cost of a loan offer.

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FHA Loan Calculator

Payment and mortgage-insurance premium estimates for a government-backed FHA loan.

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VA Mortgage Calculator

Estimate a VA loan payment, including the funding fee, for eligible service members.

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Debt-to-Income Ratio

Check your DTI against typical lender thresholds before you apply for financing.

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Rent Calculator

A quick rule-of-thumb figure for rent you can comfortably afford on your income.

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Auto Loans & Leasing

3 calculators

Investment & Savings

14 calculators

Compound Interest Calculator

POPULAR

Watch a balance grow with regular contributions and compounding over time.

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Investment Calculator

Project a portfolio's future value from a starting balance, return rate, and contributions.

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Mutual Fund Calculator

NEW

Estimate growth on lump-sum or SIP-style mutual fund investing, net of expense ratio.

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Savings Calculator

Find out how much a regular savings habit adds up to by a target date.

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Interest Calculator

Compare simple and compound interest side by side on the same deposit.

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Simple Interest Calculator

Straight-line interest on a principal, rate, and time — no compounding.

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Interest Rate Calculator

Solve for the rate needed to turn a starting amount into a target amount.

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CD Calculator

Maturity value of a certificate of deposit given its term and APY.

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Bond Calculator

Price, yield, and coupon income on a fixed-income bond investment.

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ROI Calculator

Return on investment as a percentage, from cost and current or exit value.

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IRR Calculator

Internal rate of return across a series of uneven cash flows over time.

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Present Value Calculator

What a future lump sum or cash-flow stream is worth in today's dollars.

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Future Value Calculator

Project today's savings and contributions forward to a target date.

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Average Return Calculator

Arithmetic and geometric average annual return across multiple periods.

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Retirement Planning

9 calculators

Tax & Salary

7 calculators

Debt & Personal Loans

12 calculators

Other Financial Tools

11 calculators

About Our Financial Calculators

PrimeCalculator's finance section covers every major area of personal and business money management. Each calculator is built for accuracy and speed, with a clean layout that shows step-by-step working — not just a final number.

No sign-up, no subscription, and nothing you enter is saved. Pick a tool below, plug in your numbers, and see the result instantly.

How to Pick the Right Tool

Buying a Home?

Start with House Affordability to set a budget, then Mortgage Calculator for the exact payment.

Growing Savings?

Compound Interest shows growth on a lump sum; Investment Calculator adds regular contributions.

Planning Retirement?

Use Retirement Calculator for the big picture, then 401(k) and Social Security for the details.

Paying Off Debt?

Debt Payoff Calculator shows the fastest route; Debt Consolidation checks if combining helps.