Thai font · COMMERCIAL

EucrosiaUPC

By Narongsak Chaiwong

Typography & Licensing Specialist, ThaiGraph · July 16, 2026 · Updated October 30, 2026

Information verified as of October 2026

อ่านหน้า ฟอนต์ EucrosiaUPC เป็นภาษาไทย — พร้อมลิงก์ดาวน์โหลดและวิธีติดตั้ง →

What EucrosiaUPC is

EucrosiaUPC is a looped Thai serif drawn for sustained reading in documents and print, designed by Unity Progress Corporation in 1992 and licensed to Microsoft, where it ships bundled with Thai editions of Windows and Office in four styles — Regular, Bold, Italic, and Bold Italic. It is one of the original UPC (Unity Progress Corporation) Thai system faces that predate the later “New” versions of Angsana, Browallia and Cordia (there is no Eucrosia New), and it covers both the Thai and Latin scripts.

For most Thai computer users EucrosiaUPC is not a font they chose but one they inherited: it was installed with the operating system and quietly set as a default in older documents. That makes it a compatibility face first and a design choice second — if a legacy Thai document “just renders correctly,” a UPC-family font is often why.

Character and the UPC vs New distinction

There is no Eucrosia New: Microsoft’s Windows 11 font list gives “New” cuts only to Angsana, Browallia and Cordia, and Eucrosia exists only as the four EucrosiaUPC styles. (Windows 11 font list, accessed 30 October 2026) In the font file, EucrosiaUPC is a looped serif with clear thick–thin contrast and closed round loops, and the tops of the vertical stems in letters such as ข บ พ are cut off at a flat slant rather than rounded; its Latin is a serif. Its Thai consonants average 0.43 em wide, close to Angsana New (0.42 em), another serif in the set (measured from Upcel.ttf and Angsana.ttc on 30 October 2026).

As a serif face it sits in the traditional Thai text category rather than the modern loopless movement covered in our typography guide. The Latin companion is a straightforward text alphabet included so mixed Thai–English lines can be set from a single family.

Weights and availability

EucrosiaUPC ships in four styles — Regular, Bold, Bold Italic, and Italic — and is distributed exclusively bundled with Microsoft Windows and Office, not as a separate download. It has been present in Windows from Windows XP through Windows 11, and is also available inside Office applications.

To check whether you already have it, open the font menu in Microsoft Word or your system font settings and look for “EucrosiaUPC”. Because it is a system font, there is no legitimate free-download source — it arrives with the platform.

EucrosiaUPC ships in the same package as Angsana New and Cordia New, Thai Supplemental Fonts, which you switch on yourself under Optional features in Windows 10 and 11; the PC must be online, because Windows Update does the download (Microsoft Learn, accessed 30 October 2026). Full steps are on our Thai fonts built into Windows page. The files it adds are Upcel.ttf, Upceb.ttf, Upcei.ttf and Upcebi.ttf.

Best use cases

EucrosiaUPC earns its keep on compatibility and legacy Thai documents rather than new brand work. Strong fits:

• Opening, editing, and reprinting older Thai documents that specified the UPC family
• Government, academic, and office files that must render identically to their original
• Environments standardised on Microsoft Thai system fonts
• Situations that need a widely-installed, no-cost-to-the-user Thai serif

For new design work, a modern licensed or open face — see the serif category or Sarabun — usually serves better than a legacy system font.

Licensing

EucrosiaUPC is a commercial font owned by Unity Progress and licensed through Microsoft; it is bundled with Microsoft products and is not free to redistribute or host as a webfont without a Microsoft licence. Confirm the terms on the Microsoft Learn typography page and the Office fonts documentation. See our Thai font licensing guide for how bundled system fonts differ from OFL and free faces.

Information verified as of October 2026