Calculatis by Stora Enso


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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

Calculatis® 2023 is the new release of Calculatis® by Stora Enso. The new release of Calculatis 2023 contains a new design and PDF creator. CLT timber-concrete composite floor module temporarily on-hold for technical improvements. You can find your previous calculations in the archived modules.
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