About Calculator Hub

Calculator Hub is a free set of US-focused calculators for the money decisions that actually come up: what a house really costs each month, what lands in your paycheck, how fast a loan disappears when you add a little extra, and the everyday math in between.

How the numbers work

• Tax figures use the 2025 federal brackets, standard deductions and FICA limits.
• State income tax is a simplified estimate for all 50 states plus DC; local city taxes are not included.
• Mortgage and loan math uses standard amortization, the same formula lenders use.
• Every calculation runs in your browser — nothing you type is sent anywhere.

Not financial advice

These tools are estimates to help you plan and compare. Your lender, employer or tax professional has the final word on your actual numbers.

How we keep it free

Some pages include product recommendations. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Recommendations never change a calculator's results.