Math, Science & Engineering
A complete collection of scientific and engineering calculation tools for students, educators, professionals, and enthusiasts. From basic unit conversions to advanced physics simulations, financial calculations, and specialized engineering tools. Solve equations, convert measurements, calculate loan payments, simulate physical phenomena, balance chemical equations, design electrical circuits, and estimate construction costs—all with accuracy and ease.
Find the electron configuration, noble gas notation, orbital diagram, and quantum numbers for any of the 118 elements, including ions.
Calculate concrete volume for slabs, footings, columns, walls, stairs, and more. Get bag estimates, cost projections, and export results as PDF.
Calculate area in square feet for any room or space. Supports 8 shapes, multi-zone areas, unit conversion, and cost estimation.
Estimate roofing materials and costs for your project. Calculate shingles, underlayment, ridge caps, and more from roof dimensions, pitch, and type.
Balance chemical equations in one click and see step-by-step solutions, an element-count check, the reaction type, and molar mass totals.
Calculate dilution volumes and concentrations with the C₁V₁ = C₂V₂ formula. Solve for any variable and build serial dilution series.
Calculate amounts of reactants and products in chemical reactions with automatic equation balancing, limiting reagent detection, and unit conversions.
Calculate molarity, solute mass, or solution volume instantly, with a built-in dilution calculator and a concentration unit converter.
Solve PV = nRT instantly. Calculate pressure, volume, moles, or temperature with flexible unit conversions and standard condition presets.
Convert between decibels and ratios, combine multiple sound sources, and find how sound levels change with distance, with real-time results and hearing-safety warnings.
Solve friction force, coefficient, or normal force from Ff = μ × N. Handles static and kinetic friction with real-time results, a material reference table, and a normal force helper.
Explore all 118 chemical elements with detailed properties, electron configurations, and interactive color-coded visualization modes.