General & Usage
Is QAiCalculator completely free to use?
Yes, 100% free forever. All 83+ calculators have zero paywalls, no subscriptions, and no premium features locked behind registrations.
Do I need to sign up or create an account?
No account is ever required. You can use every single calculation tool immediately without logging in or providing personal information.
How accurate and reliable are your calculators?
Our calculation engines follow peer-reviewed scientific, medical, and banking standards (including standard loan amortization tables, WHO BMI categories, and academic physics equations). We use IEEE floating-point precision with tabular formatting.
Privacy & Security
Do you store or log my financial or health numbers?
No. Calculations run 100% client-side inside your browser. We never log, store, profile, or sell your loan amounts, interest rates, weight, age, or custom formula inputs.
What data does QAiCalculator collect?
We only collect anonymous high-level counters (e.g., that a calculator was visited) with subnet-masked IP addresses (such as 192.168.1.0) for DDoS protection and GDPR/CCPA compliance.
Technical & Mobile
Do these calculators work on mobile phones and tablets?
Yes. Every tool is built with a responsive mobile-first architecture, large 44px+ touch targets, and reactive sliders that calculate instantly as you slide.
Which web browsers are supported?
QAiCalculator is compatible with all modern browsers including Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge, and Opera on Windows, macOS, iOS, Android, and Linux.
Why does a number not update when I type?
Ensure JavaScript is enabled in your browser. All calculations execute locally via standard browser JavaScript without server round-trip latency.
Formulas & Requests
Can I request a new calculator to be added?
Yes! We actively expand our catalog based on community requests. Please use our Contact page to suggest tools or formula improvements.
Where can I see the mathematical formulas used?
Every calculator includes a dedicated Formula and Methodology section right below the tool explaining the mathematical equations step-by-step.
Still Have Questions?
Can't find the answer you're looking for? Reach out to our technical team and we'll be glad to help.
Contact Support