RoomCalcs
Free building and renovation calculators for every room: tiles, flooring, paint, drywall, concrete, bricks, roofing and decks, in any unit, with PDF lists.
A startup from Pakistan, founded by Riyan.
Free building and renovation calculators for every room: tiles, flooring, paint, drywall, concrete, bricks, roofing and decks, in any unit, with PDF lists.
A startup from Pakistan, founded by Riyan.
This page is designed to help you find out whether RoomCalcs is good and if it is the right choice for you.
RoomCalcs is a free website with 44 building and renovation calculators: tiles, grout and tile adhesive, flooring, paint, wallpaper, drywall, concrete and cement, bricks and blocks, roof tiles, gravel, pavers, fences, decks, stairs, floor joist spans, insulation and more.
Every box takes any unit (mm, cm, m, inches, feet and inches, fractions), and results show metric and imperial side by side. Each calculator shows the formula it uses, a worked example and its sources. You can add prices, download a PDF or spreadsheet shopping list, and save everything to a project list.
It also has a 3D tile visualizer and a photo room designer. No sign-up, nothing to install. Available in English, German, Dutch and French.
Listed in
Next.js and React with TypeScript, styled with Tailwind CSS. The site is exported as static pages and hosted on Cloudflare Pages, so it is fast and works on any device. Three.js powers the 3D tile visualizer, and jsPDF creates the downloadable PDF lists. All calculations run in the browser, and every calculator is covered by automated tests that check it against hand-worked and published values.
Most calculator sites cover one material at a time, ask for one unit only and hide how they got the answer. RoomCalcs has 44 building and renovation calculators in one place: tiles, grout, flooring, paint, wallpaper, drywall, concrete, bricks, roof tiles, gravel, pavers, decks, stairs, floor joist spans and more. They all work the same way, so you learn it once. Results come in whole packs to buy (boxes, bags, tins, rolls) with a spare allowance, not just a bare number. You can save everything to one project list. Local sizes are built in, such as UK, US, German, Dutch and Pakistani bricks, Euro wallpaper rolls and 50 kg cement bags. There is no account, no paywall and no email required.
RoomCalcs started in 2026 from a simple frustration: working out materials for a room meant jumping between different calculators, each asking for a different unit and none showing its formula. The goal was one free site where any measurement works in any box and every answer can be checked. It launched in October 2026 with tile, paint and concrete calculators, and grew from what people actually search for: a floor joist span calculator, epoxy floor and heated floor calculators, and "per m²" tables for common materials. It is now available in four languages.
Homeowners and DIYers planning a renovation who want to know how much to buy before going to the shop. Also small builders, tilers, painters and landscapers who need a quick estimate for a quote, and students learning building calculations. Most visitors come from the US, the UK, Germany, the Netherlands, France and Pakistan.
Every box takes any unit. You can type 3' 4 1/2", 1.02 m or 40 cm, mix them, and the results show metric and imperial side by side. Each calculator also shows its formula, a worked example and the sources it is based on, so you can check the maths yourself. Many pages have ready-made "per m²" and "per 100 sq ft" tables worked out by the calculator. There is a 3D tile visualizer and a photo room designer, and you can add prices and download a PDF or spreadsheet shopping list. It is all free, with no sign-up, in English, German, Dutch and French.
We have collected here some useful links to help you find out if RoomCalcs is good.
Check the traffic stats of RoomCalcs on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of RoomCalcs on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of RoomCalcs's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of RoomCalcs on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about RoomCalcs on Reddit. This can help you find out how popualr the product is and what people think about it.
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