FEAKalc 3D

Cloud-native structural analysis for real engineering work

Model, analyse, and iterate structural frames in your browser — using the same solver at every scale.

Start free View pricing

What is FEAKalc 3D?

FEAKalc 3D is RKALC’s structural analysis engine, built for engineers who want speed, clarity, and flexibility from concept through verification.

  • 2D and 3D frame modelling
  • High-performance sparse solver
  • Instant cloud access — no installs
  • Familiar workflows for ETABS / SAP2000 users

For security reasons, please log in to your RKALC account here before making an order.

Pricing & Plans

All plans use the same solver and analysis engine. Plans differ only by allowable model size and workflow limits.

Free

Concept & Learning

  • Up to 500 DOF
  • For all of RKALC members
  • 2D & 3D modelling
  • Watermarked outputs
  • Sparse solver
  • 1 cloud project
Start modelling

Student

Academic

  • Up to 2,000 DOF
  • Free Tier features +
  • Nearly full Pro features
  • DXF import
  • Watermarked outputs
  • Non-commercial use
Verify access

Starter

Small Real Projects

  • Up to 3,000 DOF
  • DXF import & export
  • Load combinations
  • Forces, deflections, reactions
  • Unlimited cloud projects

AU$25 (30 days)

Pro

Production & Scale

  • 50,000 DOF
  • No solver throttling
  • Large parametric models
  • Advanced visualisation
  • Priority solver resources

AU$49 (30 days)

Using multiple RKALC tools?

FEAKalc 3D is also included in the RKALC Analysis Pack for AU$ 100, alongside other analysis programs.

Best suited for power users and offices that rely on multiple RKALC tools.

View Analysis Pack

Why engineers use FEAKalc 3D

Speed where it matters

Large frame models solve in seconds using a sparse matrix solver optimised for structural systems.

Think structurally

No licence servers, no dongles, no locked machines. Open a browser and work.

Iterate early

Perfect for concept studies, alternatives, and early validation before heavy models.

International by design

Built-in section libraries for AU, US, UK, EU, and China.

Start free — upgrade when your model grows

No re-work. No migration. No hidden solver changes.

Start free now