Free Interactive Utilities

Developer & Planning Tools

Sleek, client-side web calculators designed for engineering leaders, project managers, and spatial data enthusiasts. All calculations run locally in your browser for zero-latency precision.

Project Buffer & PERT Estimator

Calculate realistic task buffers using Three-Point PERT formula (t_e = [O + 4M + P] / 6) and Critical Chain Root-Sum-of-Squares variance. Mitigate Parkinson's Law and export clean estimates to Mermaid timelines.

✅ PERT Weighted Average & Variance Analysis
✅ Critical Chain Buffer Calculation
✅ Interactive Risk Slider & Confidence Intervals
✅ One-Click Mermaid.js Timeline Export

Map Projection Distortion Engine

Compare area enlargement and shape distortion across world map projections (Mercator, Dymaxion Fuller, Gall-Peters, Robinson). Explore Tissot's Indicatrix scale factors by latitude in real-time.

✅ Real-Time Area Enlargement Ratio Calculator
✅ Tissot's Indicatrix Secant & Scale Analysis
✅ Side-by-Side Projection Comparison Cards
✅ Preset Locations (Greenland, Equator, Antarctica)

Full Web Applications

Looking for our Full Flagship Suites?

Along with our lightweight tools above, you can explore our full interactive applications right here on our dedicated suites:

Explore Globdrop Game → Explore Gantt Editor →