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.
Convert between square meters, hectares, acres, square feet and 13 area units at once. Live results, adjustable decimals and one-click copy.
Convert between weight and mass units instantly. Supports metric (kg, g), imperial (lb, oz), troy weights for precious metals, and regional units like tola.
Convert between metric, imperial, and scientific length units instantly. Supports 14 units from nanometers to light years, with real-time results.
Convert data storage units including bytes, kilobytes, megabytes, gigabytes, terabytes, and their binary equivalents (KiB, MiB, GiB). See every conversion at once.
Convert between time units instantly. From nanoseconds to millenniums, get accurate conversions for scientific, everyday, and calendar time units.
Turn your screen into an accurate ruler. Calibrate to your screen size, then measure objects in centimeters or inches by placing them against the display.
An online calculator with standard and scientific modes. Handles trigonometry, logarithms, powers, percentages, and parentheses, with live results, history, and keyboard support.