Thermal + acoustic calculations

Build, calculate, and test your assemblies
before you specify them.

Build your assembly, calculate its thermal and acoustic performance, test alternatives, and export a professional report for your project - all in-house.

No account required.

U-value · Rw, C, Ctr · Dew-point check · PDF reports

ThermAcoustic Pro calculator
U-valueRwC + Ctr correction termsSteady-state dew-point checkAlternative layer stacksPDF report exportExternal walls · Partitions · Basement wallsU-valueRwC + Ctr correction termsSteady-state dew-point checkAlternative layer stacksPDF report exportExternal walls · Partitions · Basement walls
Built for architects, engineers & material manufacturers

Check options early,
before final verification.

Test thermal and acoustic options in-house while the design is still open. When the project needs final verification, your consultant starts from a clearer assembly.

Early checks in ThermAcoustic PRO

  • Results as you build the layer stack
  • Try as many variants as you need
  • U-value, Rw, C and Ctr together
  • A PDF report of the chosen assembly

Final verification with your consultant

  • Project-specific and building-level questions
  • Site conditions and detailing
  • Sign-off where the project requires it
  • A clearer brief from your early checks

Test as many wall options as you need before you commit to one.

Every result comes from the same deterministic engine, whether you run it once or fifty times.

See the plans
How it works

From the first assembly to the final documented solution.

STEP 01

Build

Create the assembly from individual layers, materials and thicknesses.

STEP 02

Calculate

Get U-value, Rw, C, Ctr and a dew-point check as you build.

STEP 03

Refine

Test alternative materials or thicknesses in the current assembly before you commit to the specification.

STEP 04

Document

Generate a professional PDF report ready for your project file.

No specialist software. Runs in your browser.

Build & calculate

Build the assembly.
Get all the results instantly.

U-value, Rw and a dew-point check, calculated as you finish the layer stack.

  • Thermal: U-value and a steady-state dew-point check
  • Acoustic: Rw with C and Ctr
  • No separate calculation pass: results update as you build
thermacoustic.pro/calculator
Example · External wall
Assembly Layers
Cement Plaster
20 mm
λ 1.40 W/mK
Aerated Concrete
300 mm
λ 0.18 W/mK
Glass Wool
100 mm
λ 0.034 W/mK
Total Thickness
420 mm
Analysis Results
U-value
U = 0.00 W/m²K
Rw Index
Rw = 0 dB
Spectrum adaptation
thermacoustic.pro/calculator
Assembly · refining layersResults update live
Gypsum board
2 × 12.5 mm
Mineral wool
50 → 100 mm
Masonry
115 mm
Gypsum board
2 × 12.5 mm
U-value
W/m²K
Rw
dB
Refine before you specify

Refine
before you commit.

Test different assembly configurations and see how changes in materials and thicknesses affect thermal and acoustic performance.

Choose the solution based on calculated performance, not on the first layer stack you happen to try.

  • Test alternative materials and thicknesses for the current assembly
  • Keep project context tied to the calculation header
  • Evaluate thermal and acoustic results together
  • Export the selected assembly as a professional report
Professional documentation

Once you have the right assembly,
document it.

Generate a professional calculation report for the selected assembly and keep the result with your project's technical documentation.

  • Clear assembly description
  • Calculated thermal and acoustic results
  • Professional PDF report
  • Ready to keep as supporting calculation documentation
Try it FREE with your own assembly

No account required.

Thermal Report
Example
Assembly Type: External wall
ThermAcoustic
PRO
Assembly Composition
420 mm
Cement Plaster20 mm
Aerated Concrete300 mm
Glass Wool100 mm
Total Weight: 245.0 kg/m²
Thermal Analysis Results
Calculated U-value
U = 0.209
W/m²K
Generated by ThermAcoustic Pro
Acoustic Report (Airborne)
Example
Assembly Type: External wall
ThermAcoustic
PRO
Assembly Composition
420 mm
Cement Plaster20 mm
Aerated Concrete300 mm
Glass Wool100 mm
Total Weight: 245.0 kg/m²
Airborne Sound Results
Weighted Sound Reduction Index
Rw = 52
dB
Generated by ThermAcoustic Pro
Built for building professionals

For the people who design,
specify and document building assemblies.

Architects & Project Designers

Test assembly options before the client meeting, not after.

Building Engineers

Spot dew-point risk or a weak acoustic layer early, before it reaches the site.

Acoustic Specialists

Run quick Rw checks on early options, then spend your time on the detailed work.

Contractors

See the calculated values of an assembly before you order materials.

Building Material Manufacturers

Show specifiers exactly how your product performs in a full assembly, not just in isolation.

1
Assembly
Focused single-assembly calculation
test alternatives before export
PDF
Reports
Professional calculation documentation
21
Frequency bands
One-third octave, 50 Hz to 5 kHz
Plans & pricing

Keep your calculation workflow in-house.

Start with the Free plan. Upgrade when you need custom materials, saved projects and professional reporting.

Free
$0

For quick checks.

No time limit. No credit card required.

Start free
  • Full thermal (U-value) calculation
  • Full acoustic (Rw, C, Ctr) calculation
  • Steady-state dew-point check
  • Common material database
  • Watermarked PDF export (3/day)

No saved projects · No custom materials · No layer-property editing

Most Popular
Professional
$39$29/mo

Early access price

or $290/year - Early access price · Save 2 months

  • Everything in Free
  • Save & reload assemblies (Saved Projects)
  • Full material library
  • Editing layer properties
  • Project history
  • Up to 5 active projects
  • 10 PDF exports / month
For bureaus & companies
Business
$99$79/mo

Early access price

or $790/year - Early access price · Save 2 months

Cancel anytime · No setup fees

  • Everything in Professional
  • Custom materials - build your own product library into every calculation
  • Up to 20 active projects - run a full pipeline, not just one
  • 40 PDF exports/month - enough for the busiest multi-project team
  • Multi-user access - up to 3 licenses, one shared material library

See full feature comparison →

No hidden fees · Cancel anytime · Secure global payments · Free plan with no time limit

Early-access pricing is currently available while ThermAcoustic PRO continues to expand.

Fair Usage Policy

FAQ

Common questions.
Straight answers.

Who is ThermAcoustic PRO for?

Architects, building engineers, acoustic specialists, contractors and building-material manufacturers who need to calculate or document the performance of a building element.

What can I calculate?

The U-value with a steady-state dew-point check, airborne sound insulation (Rw, C, Ctr) for the same wall assembly. Roofs, floors and impact sound (Ln,w) are coming soon.

Is the Free plan free forever?

Yes. Free has no time limit and no account is needed. It uses the common material database, and PDF exports are watermarked and limited to 3 per day.

Can I test different options?

Yes. Edit the layers, materials and thicknesses and the results update. Professional and Business plans can also save and reload assemblies.

Can I use my own materials?

Yes. Business users can create custom materials and use them in their assemblies. Free and Professional accounts calculate from the built-in material database.

Can I save my calculations?

Yes. Saving and reloading calculations is available with Professional and Business.

Can I generate a report?

Yes. Every plan includes PDF export. The Free plan is watermarked (3/day); Professional and Business include watermark-free PDF reports, subject to the applicable plan limits.

Can the report be used as part of project documentation?

The generated report is designed to provide clear supporting calculation documentation for the selected assembly. Whether it is sufficient for a specific project, authority or contractual requirement depends on the applicable project requirements.

Do I need specialist software or engineering experience?

No specialist software - ThermAcoustic PRO runs in the browser. It is designed for technically informed building professionals; a basic understanding of construction assemblies and building performance is recommended.

What happens if I cancel my subscription?

You can cancel at any time through the billing portal. Cancellation takes effect at the end of the current billing period, and there are no refunds for partial periods.

Ready to test your next assembly?

Build and Calculate your first Assembly.

Calculate, refine and document your building assemblies in-house.

Start with the Free plan. Upgrade when you need more. No credit card required.

No account required.

If you find this software useful, share it on:

U-value and Rw in one calculation

Try it FREE