Company

About Us

Who we are and how our calculators are built and tested.

toolshere.biz.id is a free collection of online calculators for finance, health, math, unit conversion, and everyday decisions. Every calculator shows the formula it uses, so you can check the result yourself instead of taking our word for it.

01What we do

We build simple, fast tools that work on any phone, tablet, or computer, with no account and no download. You enter your numbers, the page returns an answer, and a short explanation below the tool tells you what the answer means.

  • Calculators grouped into categories such as Finance, Health, Math, Conversion, Construction, Cooking, Fitness, and more. Use the Category menu or the full calculator list to browse.
  • Guides for each category that explain the formulas, give worked examples, and point out common mistakes.
  • Search on every page, so you can type “mortgage”, “BMI”, or “tip” and go straight to the tool.
  • Light and dark display, and layouts that adapt to small screens.

02How the calculators work

Calculations run in your own browser using JavaScript. The numbers you type are not sent to our server and are not stored by us. This also makes results appear instantly, and most tools keep working if your connection drops after the page has loaded.

Each calculator page lists its inputs, the formula or method behind the result, and notes about rounding or assumptions where they matter.

03How we keep results accurate

  • Worked examples first. Each calculator is checked against hand-calculated or published examples before it goes live.
  • Standard formulas. We use well-known formulas (for example the standard amortization formula for loan payments) and name them on the page.
  • Clear rounding. Results are rounded for display only. Intermediate steps keep full precision.
  • Fixes are quick. If you find an error, tell us. Include the calculator name and the values you entered, and we will review it.

Accurate math is not the same as advice. Real loan offers, taxes, medical decisions, and building plans depend on details a general calculator cannot know. Read our Disclaimer before relying on any result.

04Who this site is for

Students checking homework, people comparing loans or savings plans, home cooks scaling recipes, builders estimating materials, travelers converting units, and anyone who needs a quick answer they can verify. We write for general readers, so explanations avoid jargon where we can.

05How the site is funded

The site is free to use. We pay for hosting and development through advertising, currently Google AdSense. Ads are labeled by Google and are separate from our results. We do not accept payment to change a calculator’s output or to rank one tool above another. See the Privacy Policy for how advertising cookies work and how to opt out.

06Our principles

  • Private by design. We do not ask for accounts, and we do not store what you calculate.
  • Transparent. Formulas and assumptions are shown, not hidden.
  • Useful before clever. Plain labels, sensible defaults, and results you can copy.
  • Open to correction. Feedback shapes what we fix and what we build next.

07Suggest a calculator

New tools are added based on what readers ask for. Use the Contact page, choose Calculator or feature request, and describe the inputs you have and the answer you want. The more specific the example, the faster we can build it.