About Us
Universal Toolbox is a free site for Chinese- and English-speaking users. It focuses on one kind of content — practical home-improvement material calculators — so people can get straight to what they need.
What the site contains
The site offers free home-improvement material estimators — 10 calculators so far:
- Paint and exterior paint calculators
- Tile and flooring calculators
- Concrete and drywall calculators
- Mulch, sod and gravel calculators
- Roof shingles calculator
Every tool shows its formula and a complete worked example, builds in a waste allowance that matches common trade practice, and works in both metric and imperial units. You can browse them all on the data tools home page.
How we approach content
- Transparent formulas: conversion formulas, waste percentages and coverage values are visible on the page so you can check the maths yourself.
- Sourced data: coverage figures are based on manufacturers' published product data, and waste allowances follow common industry practice rather than guesswork.
- Clear limits: results are estimates. They do not replace the values printed on the product label or the judgement of a professional on site.
- Free and no sign-up: every tool and page is open to everyone, with no account required.
- Kept up to date: we review pages periodically to fix errors, update broken links and refresh version information.
About external links
Some pages may reference third-party sites, for example a manufacturer's published product data or an industry reference page. Links that are not part of our own content are marked rel="nofollow". Clicking one takes you away from our site, and the third party's own terms and privacy policy apply. We are not responsible for the accuracy or availability of external content.
Who runs the site
The site is independently run and maintained by an individual developer. It is not affiliated with any of the third-party brands mentioned on it.