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Complete ToolPatch tools directory
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.
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.
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Conversion
Featured
Power Unit Converter
Convert between PS, HP, BHP, and kW power units.
Convert engine and motor power ratings across PS, HP, BHP, and kW with quick all-unit output.
Conversion
Angle Converter
Convert angles between deg, rad, and grad.
Convert angular units for math, engineering, and graphics workflows.
Conversion
Cooking Measurements Converter
Convert kitchen volume units like tsp, tbsp, cups, ounces, pints, and liters.
Convert common cooking measurement units with quick equivalents for recipe scaling and prep.
Conversion
Data Size Converter
Convert data sizes across bytes, KB, MB, GB, and TB.
Useful for storage estimates, file size planning, and cloud budgeting.
Conversion
Energy Converter
Convert energy units: J, kJ, cal, kcal, Wh, kWh, and BTU.
Convert thermal and electrical energy units for engineering, nutrition, and utility contexts.
Conversion
Fuel Economy Converter
Convert fuel economy across mpg US, mpg UK, L/100km, and km/L.
Convert fuel efficiency units used across automotive regions with full equivalents output.
Conversion
Length/Distance Converter
Convert between metric and imperial length units.
Convert lengths and distances between millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and nautical miles.
Conversion
Power Density Converter
Convert power density between hp/L and kW/L.
Convert engine and motor specific output metrics across horsepower per liter and kilowatt per liter.
Conversion
Pressure Altitude Converter
Calculate pressure altitude from altimeter settings or station pressure.
Convert aviation/weather pressure inputs to pressure altitude in feet and meters.
Conversion
Pressure Converter
Convert pressure units: Pa, kPa, bar, psi, and atm.
Ideal for engineering checks, tire pressure, and process control tasks.
Conversion
Shoe Size Converter
Convert shoe sizes across US men's, US women's, UK, EU, and JP(cm).
Approximate shoe size conversion across major regional sizing systems.
Conversion
Speed Converter
Convert speed across m/s, km/h, mph, and knots.
Useful for transport planning, sports metrics, and navigation.
Conversion
Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin values instantly.
One-page converter for common scientific and everyday temperature units.
Conversion
Torque Converter
Convert torque between Nm, lb-ft, and kgf-m.
Convert mechanical torque units for automotive, motorsport, and engineering workflows.
Conversion
Volume Converter
Convert liters, milliliters, gallons, quarts, and cups.
Helps with recipes, lab prep, and fluid volume planning.
Conversion
Weight/Mass Converter
Convert between metric and imperial weight units.
Convert weights and masses between milligrams, grams, kilograms, tonnes, ounces, pounds, and tons.