About Us

Last updated: April 2026

What We Are

calcs.cmdbot.xyz is a free online calculator suite run by CommandBot Co. We build practical calculation tools for everyday Australians, from working out GST and mortgage repayments to tracking fitness goals and converting units.

We are not a big corporation. We are a small independent operation focused on building tools that are fast, accurate, and genuinely useful, without requiring you to create an account or hand over any personal data.

Why We Exist

Most online calculators are buried under pop-ups, force you to sign up, or are wrapped in aggressive ad experiences. We wanted something different: clean tools that do one job well and respect your time and privacy.

All calculations happen entirely in your browser. Nothing you type is ever transmitted to our servers.

Australian Focus

Many of our tools are built specifically for Australian contexts, Australian GST calculations, state-specific electricity cost estimates, Australian superannuation and retirement planning, and comparison rates for Australian loans. We reference Australian government sources and data where relevant.

Our Calculator Categories

• Finance, GST, percentages, tips, savings, compound interest, mortgages, loans, retirement
• Maths, fractions, unit conversion, speed, discounts
• Health, BMI, body fat, calories, ideal weight, pregnancy, ovulation, sleep
• Sports & Fitness, one rep max, heart rate zones, running pace, race splits
• Time, age calculator, date difference
• Utilities & Transport, electricity cost, fuel, EV charging, carbon footprint
• Australia, state-specific electricity plans, mobile and internet plan comparisons

Privacy

We collect no personal data. No analytics, no tracking cookies, no account databases. The only third-party scripts are Google AdSense (to keep the site running) and optional affiliate links to Amazon AU. See our Privacy Policy for full details.

Ownership

This website is operated by CommandBot Co. If you need to contact us, please use our contact page.

Affiliate Disclosure

Some links on this site are affiliate links (Amazon AU). If you click through and make a purchase, we may earn a small commission at no extra cost to you. This does not affect our editorial independence, we only recommend products we genuinely find useful.

Disclaimer

Our calculators are provided for general informational purposes only. They do not constitute financial, medical, or professional advice. Results should be verified against official sources before making important financial decisions. See a qualified professional for advice specific to your circumstances.

The Story Behind This Site

The idea for calcs.cmdbot.xyz came from sheer frustration. A few years ago, I was running a small side business and needed to work out GST on an invoice. I went to the first calculator site I found, clicked the input field, and was immediately hit with a full-screen interstitial ad. I closed it, found another, and that one wanted my email before showing results. A third had the right answer buried under a wall of vague "sponsored results."

That evening I thought: surely this shouldn't be this hard. A simple calculation should take five seconds, not a fight with pop-ups and newsletter popovers. I started building what I wanted to exist: a clean, no-nonsense set of calculators that actually respect your time. The Australian GST calculator was the first tool I wrote, then the mortgage and loan calculators, and it grew from there. Everything on this site exists because I genuinely needed it myself first.

Our Data Sources

We take accuracy seriously. Our calculators reference authoritative, publicly available data from the following organisations:

• Australian Taxation Office (ATO) — GST rates, tax brackets, superannuation co-contribution thresholds, and Medicare levy rates
• World Health Organization (WHO) — BMI classification ranges and recommended daily calorie intake guidelines
• Australian Energy Regulator (AER) — Default market offer prices and standing offer tariff benchmarks used in our electricity cost calculators
• Australian Bureau of Statistics (ABS) — CPI and inflation data referenced in our purchasing power and real wage calculators
• National Health and Medical Research Council (NHMRC) — Energy expenditure equations and recommended weight gain ranges used in our health and fitness tools

Where calculations rely on formulae rather than lookup tables (e.g., compound interest, one-rep max), we use widely accepted standard formulas documented in the methodology section of each calculator.

How Our Calculators Work

Every calculation on this site happens entirely inside your web browser using JavaScript. When you load a calculator, the entire logic is downloaded with the page — there is no server round-trip when you hit "calculate" or adjust an input slider. Your numbers never leave your device.

This means the tools work even if you have JavaScript disabled for our domain, and no data is transmitted to our servers as you use them. We have no access logs that capture the values you enter.

Each calculator has a "How this works" or methodology note within its page, explaining the formula used, the assumptions made, and which source data applies. We document the calculation approach for every category so you can verify the logic independently.

Content Update Policy

Tax rates, tariff prices, and government thresholds change. When they do, we aim to update the relevant calculators as quickly as possible:

• Reactive updates — when the ATO releases a new tax scale, the AER announces a tariff change, or the WHO revises a health guideline, we update the affected calculators within days of the change taking effect
• Scheduled reviews — every calculator on the site is reviewed at least once per year, regardless of whether any regulation has changed, to confirm the formulae and thresholds are still current
• User reports — if you spot an outdated rate or an incorrect result, use the contact form to let us know. We investigate all reported issues promptly

Each page shows a "Last updated" date at the top. If you see a calculator with a date that looks stale for its category (e.g., a tax calculator not updated within the current financial year), please reach out.

Accessibility

We want everyone to be able to use our calculators comfortably, regardless of how they access the web.

All pages are built to meet WCAG 2.1 Level AA guidelines. This means proper heading hierarchy, meaningful alt text for any informative images, keyboard-navigable controls, and sufficient colour contrast between text and backgrounds. Form inputs have associated labels, and error states are described in text rather than relying solely on colour.

The core calculation logic for most tools works without JavaScript enabled, using HTML form elements and server-side-equivalent logic where possible. Where JavaScript is required for live results (e.g., slider-driven inputs), the calculator still degrades gracefully and will produce a result when the form is submitted.

Screen reader users can navigate every element on the page, and results are exposed via aria-live regions so they are announced automatically when they change.