About the tools
Useful answers start with visible assumptions.
Hack Your World publishes free calculators and explanatory guides for everyday technology decisions. You can change the assumptions, see the formula, and keep a link to your result without an account.
What we verify
Calculator formulas are checked against independent worked examples, unit conversions, zero values, invalid inputs, and schedule boundaries. Each tool states its scope. An estimate is only as representative as the numbers entered; we do not measure your equipment or your connection.
How the material is produced
The tools and accompanying guides are AI-assisted. Technical explanations cite source material where relevant, and illustrative scenarios are labeled. These new guides do not claim firsthand product testing. Earlier personal writing is available separately in the Workbench.
Product specifications, third-party statements, and calculations are different kinds of evidence. We aim to keep those distinctions explicit. We do not invent test results, testimonials, or savings achieved by readers.
Your calculator inputs
Calculations run locally in your browser. The tools do not upload files, submit your entered values to our server, or store them in cookies or browser storage. The copy-link feature places your values in the URL fragment after the # sign. Anyone you share that full link with can read those values. A URL fragment is not sent in the normal HTTP request to this website.
Website access data
The web server keeps access logs that can include an IP address, requested path, time, browser user agent, and referring page. We use aggregate summaries to check operation and understand which pages attract requests. Request counts can include automated traffic and are not verified counts of people. These calculators add no third-party analytics or advertising scripts. WordPress administration and other parts of the site can have their own operational behavior.
Commercial links
No affiliate links or paid recommendations are included in this initial tool collection. If we add commissioned links or sponsored material, the relationship will be disclosed where the recommendation appears. Calculators will continue to explain their inputs and methods independently of any commercial recommendation.
Check a result
If a result looks wrong, check the unit, decimal point, electricity rate, and daily operating hours first. Each tool includes a worked example you can reproduce. Keep a copy of the inputs and compare them with the stated formula. A calculator should make the reasoning easier to inspect.