Engineering
Featured
Electrical Power Calculator
Solve power, voltage, or current from P = V * I.
Convenient electrical triangle calculator for circuits and load estimates.
Mini Tools Collection
Useful one-page tools for real work
ToolPatch is a growing collection of focused utilities. Each page handles one task with clear inputs, fast results, and practical outputs.
Engineering
Featured
Safety Factor Calculator
Calculate safety factor from material strength and working stress.
Estimate design safety margin by comparing allowable strength against expected load stress. Useful for preliminary design checks and engineering documentation.
Engineering
Featured
Torque Calculator
Calculate torque from force, lever arm, and angle.
Uses tau = F * r * sin(theta) for quick mechanical calculations.
Engineering
Featured
Voltage Divider Calculator
Compute output voltage for two-resistor divider circuits.
Useful for quick analog design checks and electronics prototyping.
Engineering
Beam Deflection Calculator
Estimate max deflection for a simply-supported beam with center load.
Uses classic formula delta = PL^3/(48EI) for quick structural checks.
Engineering
Reynolds Number Calculator
Estimate fluid flow regime using Reynolds number.
Classifies laminar, transitional, and turbulent flow from fluid properties.
Engineering
Thermal Expansion Calculator
Calculate linear expansion from alpha, temperature change, and length.
Useful for materials, piping, and tolerance planning under temperature shifts.