Calculate thermal & acoustic
performance of your custom assemblies.
Define your assembly and instantly get U-value, Rw, Lnw, and condensation risk analysis. Compare up to four different assemblies side by side and export professional PDF reports.
Stop switching between tools.
Run everything in one pass.
Define the assembly once. Thermal, acoustic, and condensation results appear together — no second tool, no re-entry, no copy-paste between spreadsheets.
Thermal & acoustic — one pass
Enter the layers once. U-value, Rw, C, Ctr, and — for floors and roofs — impact sound (L'n,w) come back together — not sequentially, not in separate panels.
Compare 4 assemblies at once
Load up to four wall, roof, or floor configurations side by side. The numbers update as you tweak — no waiting, no confirm button.
Condensation risk, built in
Every calculation runs a Glaser-method condensation check automatically. You find out before you build, not after you submit.
Professional PDF reports
One click exports a PDF with layer breakdown, thermal and acoustic results, and the sound insulation diagram. Already formatted.
Built for engineers who don't have time to run two separate calculations.
“Two separate tools, two separate report formats, two chances for input errors. This fixed that.”
EN ISO 6946 for thermal, EN ISO 12354-1 for airborne sound and EN ISO 12354-2 for impact sound. All required in Serbia and across the EU — covered in a single calculation.
Every layer.
Every result.
One screen.
Add materials from the database, set thicknesses, and hit calculate. Thermal transmittance, airborne and impact sound reduction, and condensation risk come back together — you don't have to jump between tools.
- Material database with thermal and acoustic properties
- Automatic condensation check — Glaser method (EN 13788)
- Impact sound (Lnw) for floor and roof assemblies
- EN ISO 6946 and EN ISO 12354-1/2 compliant
- Results update without a page reload
Compare your options
before locking in the spec.
Load up to four configurations at once. U-value, Rw, impact sound (Lnw) for floors and roofs, and condensation status for each show up in the same view. You can see which one meets every requirement — without running them one at a time.
- Assemblies A, B, C, D in one session
- Thermal and acoustic results for all four — same screen
- Compliance status per assembly
- Save favourites to your account
Simple pricing. Built for how you work.
Start free. Upgrade when you need more.
Free forever. No credit card required.
Get started free- Full thermal (U-value) calculation
- Full acoustic (Rw, C, Ctr) calculation
- Impact sound (Lnw) calculation
- Condensation risk check (Glaser)
- Basic material database
or €390/year — save 2 months
- Everything in Free
- Custom materials
- Save & reload assemblies (Saved Projects)
- Compare up to 4 assemblies side by side
- Project history
- Up to 5 active projects
- 10 PDF exports / month
or €990/year — best for studios & bureaus
- Everything in Professional
- Up to 20 active projects
- 40 PDF exports / month
- Multi-user access — up to 5 licenses
No hidden fees · Cancel anytime · Secure global payments · EN ISO compliant workflows
Built on validated acoustic engineering.
Not guesswork.
Sound transmission loss is predicted using the mass-law and critical-frequency approach for simple partitions, with more refined models for multi-layer, lined, and composite constructions. These models are continually checked and adjusted against laboratory measurements — which is what keeps the predictions accurate across a wide range of real-world wall, floor, and roof buildups.
Good to know: like any acoustic prediction tool, ThermAcoustic Pro is not a substitute for laboratory test data. Use it to compare options and lock in a design with confidence — then validate the final, certification-critical assembly against tested data.
Common questions.
Straight answers.
What exactly does ThermAcoustic Pro calculate?
You enter an assembly once — ThermAcoustic Pro returns U-value, airborne sound reduction (Rw), impact sound level (L'n,w) for floors and roofs, and a Glaser-method condensation risk check. All from the same input.
What standards does the calculation follow?
Thermal calculations follow EN ISO 6946. Acoustic calculations follow EN ISO 12354-1 for airborne sound insulation and EN ISO 12354-2 for impact sound insulation. Condensation analysis follows the Glaser method per EN 13788.
How many assemblies can I compare at once?
Up to four assemblies (A, B, C, D) simultaneously. Results for all four update in real time.
Can I export results as a PDF?
Yes. Export a PDF from any calculation — it includes layer breakdown, thermal and acoustic results, and the sound insulation diagram.
Do I need an account to use the calculator?
No account needed to calculate. Sign up free to save assemblies and export up to 3 PDFs. Pro lifts the limits.
What types of assemblies are supported?
Exterior walls, flat roofs, pitched roofs, floors, and internal partitions. Each type uses the appropriate boundary conditions per the standard. Floor and roof assemblies also get an impact sound (L'n,w) analysis alongside the airborne result.
Is the calculation reliable for regulatory certification?
The methodology follows EN ISO standards referenced by Serbian and EU building regulations. For official certification, verify local requirements with your authority.
Is ThermAcoustic Pro free to use?
Yes. The Free plan gives you unlimited thermal and acoustic calculations with no account required. Professional at €39/month adds saved projects, 4-way comparison, and PDF export (10/month). Studio at €99/month raises those limits and adds up to 5 team licenses.
Calculate your first assembly
in under two minutes.
No setup. No card. Free plan handles most projects — upgrade if you need to save more than three assemblies or export more PDFs.