Contact Us
Have a question about one of our calculators? Found an error in the results? Want to suggest a new calculator? We'd love to hear from you. Calk-AU is built and maintained by Konstantin Iakovlev, and every email gets a personal response.
Email Us
support@calk-au.comWe typically respond within 1-2 business days.
Reporting a Calculation Error
Accuracy is our top priority. If you believe a calculator is producing incorrect results, please include:
- 1.Which calculator you were using (e.g., Income Tax Calculator)
- 2.The values you entered (e.g., $85,000 annual income)
- 3.The result you received vs the result you expected
- 4.Your source for the expected result (e.g., ATO calculator, payslip, tax agent)
We cross-check all reported errors against the ATO's official calculators and resolve confirmed issues within 24 hours.
Suggest a Calculator
We're always looking to add calculators that Australians actually need. If there's a financial calculation you frequently do manually, we probably want to build a tool for it. Tell us what you need and we'll add it to our roadmap. Currently we have 91 calculators across tax, pay, mortgage, super, loans, property, business, health, auto, energy, and general tools.
Common Questions
Are the calculators really free?
Yes, all 91 calculators are completely free with no signup or paywall. The site is supported by advertising.
How often are calculators updated?
All calculators are updated at the start of each Australian financial year (1 July) and after Federal Budget announcements. Read our methodology for details.
Is my data safe?
All calculations happen in your browser — your data is never sent to any server. See our Privacy Policy.
You may also find these pages helpful: