Calculatis by Stora Enso


How can we help you?

Send us a message
Search for contacts here
Find a contact
Look for a job at Stora Enso.
Get a job

Calculatis: a state-of-the-art timber design tool

Calculatis by Stora Enso is a timber design tool for engineers. Efficient and fully web based, Calculatis allows you to analyse structural elements in our mass timber products, including products from our Sylva™ by Stora Enso range. 

Designed for timber construction

Developed to fit the needs of engineers working with wood construction, Calculatis includes design modules for floors, roofs, columns, beams, headers, supports, and connections for structures made from CLT, LVL, glued laminated timber and solid timber. The tool can also conduct hygrothermal (U-value, Glaser Diagram and condensation) and fire design (R, E and I criteria) analysis according to Eurocode and Swiss building code (SIA).

Structural analysis made simple

Calculatis supports all steps of your timber construction project with an efficient workflow and accurate results. With easy and clear parameterization, ready-to-use modules and illustrative reports, the tool helps you save time and access all calculations in one place.

A tool for everyone

Calculatis is free of charge and can be used directly through your web browser, independent of operating system. You can access the tool on desktop, laptop or tablet without the need to install software or save your project files locally. The tool is available in six languages and has over 19 000 users worldwide. Get free access now by signing up on

Key features

  • Available in six different languages

  • Compatible with all operating systems and web browsers

  • Easy to use

  • Free

  • Tailored to different market regulations

Sign upSylva™ by Stora Enso

New Calculatis features

  • Improvement of fire design warnings for Sylva GLT Beam and Sylva CLT Rib
  • Updated national parameters for Italy
  • Fire design according to new fire classifications added for Sylva LVL Rib
  • Fire design added for Sylva LVL Rib closed type
  • Improved design for point loads on Sylva CLT Walls
  • Update of Sylva CLT Walls, Floors and Roofs according to our latest ETA-14/0349 (2022)
  • New User Manual (light version)
Read more

Quick links