CalcKit is a comprehensive collection of calculators and converters that can help you solve everyday problems. It features over 150 free calculators and unit converters, including a highly customizable scientific calculator. With CalcKit, you can perform simple calculations, unit and currency conversions, percentages, proportions, areas, volumes, and more. The scientific calculator offers instant results, copy and paste support, customizable scientific keypad, editable input and cursor, memory buttons, advanced calculation history, and a floating calculator widget.

CalcKit includes calculators and converters for algebra, geometry, electronics, finance, and miscellaneous topics. The algebra section includes percentage calculator, proportion calculator, average calculator, equation solver, combinations and permutations, decimal to fraction, fraction simplifier, prime number checker, greatest common factor and least common multiple, and matrix calculator. The geometry section includes calculators for various shapes, such as triangle, square, rectangle, parallelogram, rhombus, trapezoid, hexagon, polygon, circle, cube, cuboid, prism, pyramid, tetrahedron, octahedron, cylinder, truncated cylinder, cone, sphere, and torus.

The electronics section includes calculators for resistor color code, inductor color code, LED resistor, series and parallel components, Ohm's law, power triangle, Y-Δ transformation, voltage divider, voltage regulator, operational amplifier, NE555 timer, filters, reactance and resonance, wire resistance and conductance, transformer ratio, battery life, analog-digital converter, and frequency. The finance section includes calculators for currency conversion, sales tax, tip, simple and compound interest. The unit converters section includes converters for angle, area, cooking, data storage, energy, force, fuel, length, weight, numeric base, power, prefixes, pressure, Roman numerals, shoe size, speed, temperature, time, volume, acceleration, airflow, density, inertia, torque, voltage, current, charge, conductance, field strength, resistance, resistivity, capacitance, inductance, flow, flux, permeability, viscosity, heat, light, magnetism, radiation, frequency, and more. The miscellaneous section includes calculators for date, time, and analytical geometry.

CalcKit also offers custom tools builder for creating your own calculators with up to 25 variables per calculator and detailed tutorial with examples. You can create shortcuts on the home screen for faster access to your favorite calculators and converters. CalcKit is available for free on Android and iOS devices.