Meet CalcKit, the original All-In-One Calculator for Android. Designed with simplicity in mind, CalcKit helps you solve all kinds of everyday calculations. From simple and complex calculations, to unit and currency conversions, percentages, areas, volumes and more.

Passionate development combined with constant feedback from our users resulted in what we believe is the best calculator and converter app ever created.
Featuring over 150 FREE Calculators and Unit Converters, packed in with a highly customizable Scientific Calculator, CalcKit is the only calculator you will ever need on your device.
If you are a student, teacher, enginer, handyman, contractor or just somebody who struggles with math & conversions, you really should give CalcKit a try.

Scientific Calculator
• Customizable buttons / functions
• Editable input & cursor
• Copy & Paste support
• Calculation history
• Memory buttons
• Floating calculator

150 Calculators and Unit Converters
• Geometry, Algebra, Equations, Electronics, Finance and more
• Currency converter with 160 currencies, available offline
• Search, sort or add calculators to favorites
• Instant results delivered as you type
• Create shortcuts on home screen

Custom Calculators
• Unlimited custom calculators
• Up to 25 variables per calculator
• 50+ available functions

Geometry
Triangle, Square, Rectangle, Parallelogram, Rhombus, Trapezoid, Hexagon, Polygon, Ellipse, Circle, Cube, Cuboid, Prism, Tetrahedron, Octahedron, Pyramid, Cone, Cylinder, Torus, Sphere

Equations
• Linear, Quadratic and Cubic Equations
• 2x2 and 3x3 Systems

Analytical Geometry
• Distance between 2 points
• Area of Triangle
• Equation of Circle and Sphere

Algebra
• Average / mean
• Combinations / Permutations
• Decimal to fraction
• Fraction simplifier
• GCF / LCM
• Prime number checker
• Proportion calculator
• Matrix calculator

Finance
• Currency converter
• Sales tax calculator
• Tip calculator
• Interest calculator

Electronics
• Resistor / Inductor Color Codes
• LED Resistor Calculator
• Series / Parallel Components
• Ohm's Law
• Power Triangle
• Y - Δ Transformation
• Voltage divider
• Voltage regulator
• Operational amplifier
• NE555 Timer
• Filters
• Reactance
• Wire resistivity
• Transformer ratio
• Battery life calculator
• Analog - Digital converter
• Frequency calculator

Common Converters
• Numbers
• Roman numerals
• Prefixes
• Angle
• Area
• Cooking
• Data storage
• Fuel consumption
• Mass (Weight)
• Length
• Temperature
• Time
• Speed
• Pressure
• Power
• Volume
• Force
• Energy

Electricity Converters
• Charge
• Current
• Conductance
• Conductivity
• Field strength
• Potential
• Resistance
• Resistivity
• Capacitance
• Inductance
• Charge and current density

Engineering Converters
• Acceleration
• Angular acceleration and velocity
• Airflow
• Density
• Moment of inertia
• Specific volume
• Torque

Fluids Converters
• Concentration
• Flow
• Mass flux density
• Permeability
• Surface tension
• Viscosity

Heat Converters
• Fuel efficiency
• Heat and flux density
• Transfer coefficient
• Specific heat capacity
• Temperature interval
• Thermal conductivity, expansion and resistance

Light Converters
• Illumination
• Luminance
• Luminous intensity

Magnetism Converters
• Field strength
• Flux and flux density
• Magnetomotive force

Radiation Converters
• Radiation
• Absorbed dose
• Activity
• Exposure
Whats New

• Added a new setting where you can choose between the Built-in and Android keyboard as an alternative input method, when third-party keyboards interfere with CalcKit's integrated keypad functionality.
• Made some changes to the calculator and keypad design.
• Added the clothing converters in their own "Clothing" sub-category.
• Fixed a bug in the Toolbox Onboarding process.