About

What you will find here

The tools cover everyday number problems in a few broad groups:

• Math and geometry: percentages, fractions, ratios, areas, volumes and basic statistics.
• Finance and business: loans, compound interest, returns, VAT, margins, markup and break-even.
• Health and fitness: BMI, calorie needs, body fat, heart-rate zones and running pace.
• Date and time: days between dates, age, working days, time sums and time zones.
• Home and cooking: concrete, paint and tile quantities, recipe scaling, cups and grams.
• Converters: length, area, volume, speed, data units, time, shoe sizes and Roman numerals.

Everything on the site is public. There is nothing to sign up for, no account to create and no login. A few optional conveniences, such as saving tools with a star, a list of the last tools you opened, a unit choice, and using pages you opened without a connection, live in your own browser and need no account.

Who it is for

Reeliy is for anyone who wants a quick answer to a number question: students checking their working, people planning a budget, cooks converting a recipe, or anyone who would rather not do long arithmetic by hand.

Each page shows its inputs, assumptions and limits, so you can judge whether a tool fits your situation before you rely on its result.

Any tool can also be shown on another website with the free embed code on our Widgets page.

Our principles

• Accuracy. We aim for correct results, and we say plainly when a result is only an estimate.
• Transparency. Each page names its inputs, states its assumptions and points out its limits, so you know what the number does and does not mean.
• Independence. Advertising never influences how a calculation works, what result you see, or how tools are ranked.
• Your numbers are not uploaded. The calculators run in your own browser, and the site never uploads what you type. Once you press the button what you typed does appear in the page address, so share a calculator link only if you are happy for the person receiving it to see it, and do not type secrets into a tool.

Your saved tools, the list of tools you opened last, your unit choice and offline copies of pages stay in your browser. We do not receive them; the Cookie Policy lists each item and how to remove it.

To be open about the rest: we use Google Analytics to measure traffic and Google AdSense to show ads, and both can use cookies. For visitors in the EEA, UK and Switzerland, analytics and ad cookies stay off until you choose “Accept all” in the cookie dialog, and no ads load until then. Elsewhere they are on by default, and you can switch them off by choosing “Essential only”. The details are in our Privacy Policy and Cookie Policy.

How the tools are made and checked

Each calculator is built from published, standard formulas or well-established methods. We check each tool against worked examples, against the standard formula or a published reference where one exists, and against other calculators. Where another calculator disagrees with the formula, we follow the formula. The tools have not been audited by an outside specialist.

To be plain about who is behind the work: the tools, guides and articles on Reeliy are published under one name. “Reeliy Editorial Team” is the name this work is published under. It is not a group of named people, and no professional qualification is claimed for it. Every tool is covered by automated tests (for calculators and converters, they compare the results with worked examples and recorded reference results).

Each tool page shows the formula it uses, at least three worked examples with their answers, the mistakes people most often make with that kind of problem, and answers to questions specific to that tool. Where a result touches money, health or tax, the page links to the official or standards-body source the method comes from, so you can check it yourself.

The articles explain the problems behind the tools and link to those same sources. Each carries its published and last-updated dates. The operator can pause, change or remove any article.

Articles do not all go through the same checks, so here is what applies to which. The articles dated 19 October 2026 are the launch set. They were published together under the operator’s overall plan for the site. Each was checked when it was written and was covered by the site-wide audits, but none had a separate second check of its own before it went live.

Articles scheduled from 25 October 2026 follow a plan the site’s operator approved, and a separate second check re-verifies every number and claim in each one before it is scheduled. The operator can pause, change or remove any article.

If you spot a mistake, tell us. We fix confirmed errors promptly and change the page’s update date so you can see that something changed.

Our full approach, including how we handle corrections, is set out in the Editorial Policy.

Who runs the site

Reeliy is published by Fikrra Plus Research and Development in Educational Technology L.L.C. S.P.C.. Questions, corrections and requests go to support@reeliy.com, and the Contact page says what to include.

The company is licensed by the Dubai Department of Economy and Tourism (licence number 1558105) and also runs the Arabic AI content platform fikrra.com. The site is owned and edited by Badar Al-Raisi, the founder of that company, who decides which tools and articles are added and how corrections are handled.

How the site is funded

The tools are free to use. The site is funded by advertising shown to visitors.

We do not currently run affiliate links, sponsored posts or paid reviews. If that changes, we will label them clearly and update the Advertising Disclosure.

What our results are, and are not

Results are estimates provided for information. They are not medical, financial, tax, legal or engineering advice, and they cannot take account of your personal circumstances. For decisions that matter, please check with a qualified professional. Our Disclaimer has the full wording.

Suggest a tool or report a mistake

We would like to hear from you if there is a calculator you wish existed, a tool that could be clearer, or a result that looks wrong.

When you report an error, please tell us which page it is on, what you entered, what result you got and what you expected. That helps us reproduce it.

The only way to reach us is by email at support@reeliy.com. The site has no contact form, comments or forum. More details are on the Contact page.