Free Human Factors Tools
Four of the methods from the ErgoSphere platform, rebuilt as free tools you can use right here in your browser. No login, no sign-up, and nothing leaves your machine: every calculation runs locally and nothing is uploaded or stored on a server. Use them for a quick assessment, to teach a method, or just to try the approach before you commit to anything.
They are a genuine free resource, and a small taste of the full ErgoSphere desktop platform, which saves projects, links assessments together and produces audit-ready reports.
Four Tools, Ready to Use
HTA Diagram Builder
Build a Hierarchical Task Analysis as a clean, numbered top-down diagram. Add the goal, sub-tasks and plans, then download the chart as a PNG.
Open tool →RULA Calculator
Score upper-limb postural risk with the standard RULA worksheet. Pick the postures for arm, wrist, neck, trunk and legs and get the grand score and action level live.
Open tool →NASA Task Load Index
Measure perceived workload across six dimensions, with optional pairwise weighting, and see your raw and weighted Task Load Index instantly.
Open tool →SART Calculator
Rate the ten SART items across understanding, supply and demand, and get the operator's situation awareness score live, using SA = U - (D - S).
Open tool →Simple, Private, Yours to Keep
Pick a Tool
Open the HTA builder, the RULA calculator, NASA-TLX or SART. There is no account to create and nothing to install.
Work in Your Browser
Everything runs locally on your own device. Nothing you enter is uploaded, sent to us, or stored on any server.
Download or Print
Export your diagram or result card as a PNG, or print it to PDF, so you can keep it, share it or drop it into a report.
Like these? The Full Toolkit Goes Further.
The ErgoSphere desktop platform brings together fifty-two tools, including fifteen original instruments available nowhere else, saves everything into one project file, links your assessments to task and risk registers, and rolls the whole lot into audit-ready reports.
