Estimate the website before the pitch.
Build a planning band from the actual job. The calculator uses public Thailand price ranges and DLVX's published custom starting point. It asks for no name, email or company details.
What the range can and cannot tell you.
The tool expands a broad base range when language, content, migration and integration responsibility increase. It does not price unknown security, product or data requirements. Those need a real scope and acceptance criteria.
Read the source snapshot before comparing the result with a proposal. A package page, a custom commercial site and a connected platform are different products even when all three are sold as a website.
Read the Thailand website cost index