GridHub Free Tools

Make the numbers make sense.

Free calculators for budgets, debt, savings, business profits, invoices, and rental properties. Get clear answers in seconds. No signup required.

Completely freeNo account requiredInstant resultsInteractive chartsMobile friendly

Start with a number

Free calculators for real decisions

Compare snowball and avalanche payoff plans, estimate interest, and see how extra payments can change your timeline.

Organize monthly income and planned expenses to see what remains.

Estimate rental income, operating expenses, mortgage costs, and cash flow.

Find a monthly contribution that can help you reach a savings target.

Calculate unit profit, gross margin, markup, and a target-margin price.

Add line items, discounts, tax, fees, and payments to estimate an invoice balance.

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