Frequently Asked Questions
Are these calculators really free?
Yes. Every calculator on calculator-free.com is 100% free. No subscription, no account, no hidden fees. We're ad-supported — you see ads, we keep the lights on, you get professional-grade tools at no cost.
How accurate is the mortgage calculator?
Our mortgage calculator uses the standard amortization formula and includes PITI (Principal, Interest, Taxes, Insurance). It is accurate for fixed-rate mortgages. Actual lender rates, origination fees, and escrow requirements may vary — use these results as a planning estimate and confirm with your lender.
Can I use these on my phone?
Yes. All calculators are fully responsive and work on mobile, tablet, and desktop. No app download required — just open your browser and go. The layout adapts automatically to any screen size.
Is my data saved or tracked?
All calculations happen entirely in your browser using JavaScript. We don't store, transmit, or log any numbers you enter. Your data never leaves your device. See our
Privacy Policy for full details on what data we do collect (standard analytics).
Do you provide financial, medical, or legal advice?
No. All calculators on calculator-free.com are for informational and educational purposes only. Results are estimates based on the inputs you provide. For financial decisions, consult a licensed financial advisor or CPA. For health decisions, consult a qualified healthcare provider. Calculator results should never be the sole basis for major decisions.
How often are the calculators updated?
We review and update our calculators regularly. The mortgage and loan calculators use standard financial formulas that don't change. The BMI calculator uses current WHO standards. We update tips, rates, and reference data (like 2026 HYSA rates in the savings calculator) as they change throughout the year.
What other free tools are available?