BOKKA Tools
Free online calculators for designers, contractors and clients. Check Polish WT 2021 compliance, calculate required insulation thickness, convert EPS/mineral wool to PIR, estimate material quantity. No registration, no data collection — everything calculated locally in your browser.
U-value Calculator
Calculate the heat transfer coefficient U for any layer system. Check Polish WT 2021 compliance. Compare your solution with a termPIR proposal.
Keywords: U-value, WT 2021, insulation, lambda, R
Available in English
EPS / Mineral Wool → PIR Conversion
30 cm of EPS in your project? Check what it would be in termPIR AL, WS, AGRO AL. Thickness savings + λ comparison.
Keywords: EPS, mineral wool, PIR, equivalent thickness, insulation conversion
Available in English
Roof Area — m² of PIR Boards
Calculate the area of a pitched roof (single- or dual-pitched) and the number of termPIR boards needed. With 5% surplus.
Keywords: roof area, PIR board count, dual-pitched roof
Who are these tools for?
👷 Designers
Quick U-value calculations during partition design. Polish WT 2021 compliance check. Thickness selection for specific energy standards (NF40, passive house).
🔨 Contractors
Calculate material quantity for a specific project — m² of insulation, board count, m³ of slope wedges. Shopping list for the warehouse.
🏡 End clients
Compare: how much thickness and space you'll save by switching from EPS/wool to PIR. Check if your project meets the standard.
Need help with your project?
Our technical advisors will help you choose a solution for specific requirements — from a single house to a logistics hall.