Home › Science & Engineering Calculators
This page brings together every science and engineering calculator on Calculate.co.nz, currently 124 tools, organised into physics and mechanics, chemistry, and electrical and electronics, plus a growing set of structural and materials engineering tools. Use it as a directory: find the topic you need and click through to a calculator with its own inputs and instant results. Physics and mechanics covers motion, force, energy and momentum, including velocity, acceleration, projectile motion, kinetic and potential energy, torque and simple harmonic motion. The chemistry section covers molar mass, molarity, moles, pH, dilution, stoichiometry and gas laws, while the electrical group solves Ohm's law, power, resistor networks, capacitor and inductor behaviour, and voltage drop. Newer additions handle applied engineering problems like beam deflection and bending stress, bolt torque and tension, concrete mix ratios, pipe flow and Reynolds number, and weld sizing. Every calculator shows the formula it uses and the working behind the answer, not just a final number, so the tools work as a study aid as well as a quick check. All of them are free, need no sign-up, and link to related calculators so you can move between connected formulas. Because real engineering and construction work carries safety and cost consequences, treat structural and materials results here as a planning guide only, and have any load-bearing design checked by a qualified engineer.
124 free calculators in this category
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