A management platform and a construction universe
PRAXAO is a platform for running a professional activity: quotes, invoices, clients, products and services, stock, cash and day-to-day follow-up. A free account saves your work; paid plans lift the limits.
BUILIVA (by PRAXAO) is the universe built for construction: material quantities, take-offs, estimates and quotes, with visible assumptions and realistic waste margins.
The free tools stay usable without an account, within a fair limit.
Our principles
- Free and without an account: every tool works immediately (up to 5 calculations a week without an account; a free member account gives 5 a day).
- Exact: amounts are computed with decimal arithmetic and rounded correctly for each currency.
- Private: your figures stay in your browser; a document is sent to our server only to build the PDF you request, and is not kept.
- Multilingual: English, French, Spanish, German, Italian, Portuguese and Arabic, with localized numbers, currencies and documents.
- Honest: advertising, when present, is always labelled and separated from the tools.
How we check the calculations
- Amounts are computed with exact decimal arithmetic, never floating-point numbers.
- Each calculator is checked by automated tests on examples whose result was worked out by hand.
- Assumptions (coverage, waste, mixes, rates) are shown and editable: replace them with those of your product, your site or your country.
- Site results are estimates: they do not replace a contractual take-off or structural design by a professional.
Guides and updates
Each guide explains the calculation behind a tool: formulas, a worked example, common mistakes and the date of the last update.
When a rule depends on the country (VAT, mandatory mentions, allowances), we say so and invite you to check the official source before applying a result.
Publisher
PRAXAO is published by PRAXAO. For any question or correction: service@praxao.com.
What you will find today
Generators for invoices, quotes, purchase orders and delivery notes with PDF export; dozens of BUILIVA calculators (concrete, reinforcement, stairs, roofing, tiling, painting, plaster, earthworks…), many with a drawing and a 3D view; practical guides written around the same calculations; and an account area to keep your clients, products, documents and job sites.
Limits you should know about
BUILIVA results are quantity estimates: they do not replace an engineer, a structural design or the good practice of a specific site. Tax rates and rules depend on the country and the date, so check them with the official source before issuing a document. Found a mistake or doubt a result? Tell us: we will correct it.
Contact
Questions, suggestions or a mistake to report? Write to service@praxao.com.