Frequently Asked Questions

Question 1

Is CalkHub completely free?

Answer

Yes. Every calculator on CalkHub is completely free. No premium plans, no sign-ups, no paywalls. We keep the site free by displaying non-intrusive advertisements via Google AdSense.

Question 2

Do I need an account?

Answer

No account is required. Open any calculator and start using it immediately â€” no registration, no email address, no password.

Question 3

How accurate are the calculations?

Answer

All calculators use standard, widely accepted formulas and are manually tested for accuracy. However, results are estimates and should not replace professional advice. For medical decisions always consult a doctor; for financial decisions always consult a qualified financial adviser.

Question 4

Is my data private?

Answer

Yes. All calculations run entirely in your browser â€” nothing you enter is ever sent to our servers. We do not track, store, or sell your calculator inputs. See our Privacy Policy for full details.

Question 5

Why do you show ads?

Answer

Ads through Google AdSense allow us to keep CalkHub free for everyone. Ads are non-intrusive and clearly labelled. You can opt out of personalised ads via Google's Ad Settings. See our Cookie Policy for more on how AdSense uses cookies.

Question 6

What is Google AdSense?

Answer

Google AdSense is an advertising service by Google LLC that displays contextual and interest-based ads on websites. It may use cookies (including the DoubleClick DART cookie) to serve relevant ads. For details, see our Cookie Policy or visit Google's Privacy Policy.

Question 7

Can I suggest a calculator?

Answer

Absolutely! Use our Contact page to suggest a tool. We review all suggestions and regularly add new calculators based on user demand.

Question 8

I found an error in a calculator. What should I do?

Answer

Please contact us with details of the calculator and the error. We take accuracy seriously and will investigate and fix any confirmed errors promptly.

Question 9

Why are some results approximate?

Answer

Health-related calculations (BMI, calorie needs, etc.) use formulas designed for general populations. They produce statistically valid estimates but cannot account for individual variation â€” genetics, health conditions, medications, and other factors all affect real-world results. These tools are best used as general guides rather than precise measurements.

Question 10

How do I contact CalkHub?

Answer

Use the Contact page. Fill in the form and we will respond within 2 business days. For urgent privacy matters please include "Privacy" in the subject line.