Math & Scientific tool map
Physics & engineering
Motion, forces, electricity, waves, and physical properties.
Choose the tool whose inputs and output match your task. Check each calculator’s assumptions and limitations before using its result.
Newton to Joules Calculator
Calculate mechanical work in joules from force in newtons and distance in meters, with units, formulas, examples, limitations, and physics context.
Ohm's Law Calculator
Solve voltage, current, resistance, and power for simple resistive circuits using Ohm's Law, unit conversions, domain limits, and worked examples.
PPI Calculator
Calculate display pixels per inch from pixel width, pixel height, and diagonal size, with aspect ratio, pixel diagonal, and screen area context.
Relative Velocity Calculator
Calculate relative velocity from two speeds and the angle between their velocity vectors, with units, vector formula, examples, and edge-case guidance.