One page. One job. Done.

Useful one-page tools for real work

ToolPatch is a growing collection of focused utilities and practical workflow toolkits. Each page handles one task with clear inputs, fast results, and usable outputs.

Browse the complete tools directory

Toolkits for common workflows

Start with a workflow when the job spans several small tools, assumptions, or handoff steps.

Startup Unit Economics Toolkit

Build, stress-test, and communicate your core economics in one workflow.

Network Troubleshooting Toolkit

Diagnose addressing, DNS, and transport bottlenecks quickly.

Lab and Chemistry Calculations Toolkit

Plan solution preparation, dilution, gas-law, reaction-yield, and pH checks with visible chemistry assumptions.

Project Delivery Planning Toolkit

Forecast schedule and delivery risk using practical PM metrics.

Engineering Field Calcs Toolkit

Fast first-pass engineering calculations for site and workshop decisions.

Chart Generators Toolkit

Choose the right chart generator for radar, spider, radial, Gantt, Sankey, bubble, Pareto, funnel, waterfall, trend, comparison, and distribution views.

Marine Navigation Calculators Toolkit

Use practical marine navigation calculators for CPA/TCPA, under-keel clearance, tide windows, route distance, set and drift, fuel range, ETA, anchoring, COLREGs encounter checks, and vessel turning estimates.