How We Build and Check Our Tools
UtilityForge is written and maintained by Mohak Mangal. This page explains how the tools and articles here are made, so you can judge how far to trust them.
Formulas and standards we rely on
- Contrast checker: the WCAG 2.1 relative-luminance and contrast-ratio formulas.
- Subnet calculator: unsigned 32-bit integer arithmetic, with RFC 1918 for private ranges and RFC 3021 for /31 links.
- Cron explainer: the standard five-field syntax with the classic rule that restricting both day fields matches either one.
- Loan calculator: the reducing-balance EMI formula with monthly compounding, simulated month by month.
- Time zone planner: the IANA time-zone database built into your browser, evaluated for the exact date you choose.
- Business days: UTC calendar dates, so daylight saving cannot shift a result.
How we test
Each tool is run against known answers before release, including edge cases: a /31 and /32 network, an invalid octet, a cron expression with a step over its range, the loan with zero interest, a date range that crosses a holiday and a weekend. Numbers quoted in articles, such as loan savings, contrast ratios and subnet sizes, are generated by code rather than typed from memory.
Privacy by design
Everything runs in your browser. We do not receive what you type.
Our articles
Articles are written to explain how something works and where people go wrong, with worked examples. We avoid inventing statistics, and where a rule depends on a provider or a country, we say so and suggest checking the current official documentation. Content about money, law or security is general information and not professional advice.
Corrections
If you find an error, email contact@mohakmangal.in with the page and what you found. Verified corrections are made promptly and listed on our updates page.
Advertising
The site may show ads. They never influence how a tool calculates or what an article says.