CalcKit: All-In-One Calculator

Contains adsIn-app purchases
11K reviews
Content rating
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About this app

CalcKit is a simple but powerful collection of calculators and converters for math, electronics, finance, and more.

Designed with simplicity in mind, it helps you solve all kinds of everyday problems.

From simple calculations to unit and currency conversions, percentages, proportions, areas, volumes, etc… it does it all.

Featuring over 150 FREE Calculators and Unit Converters, packed with a highly customizable Scientific Calculator, it's the only calculator you'll need on your device from now on.

Scientific Calculator
★ Instant results
★ Copy and paste support
★ Customizable scientific keypad
★ Editable input & cursor
★ Memory buttons
★ Advanced calculation history
★ Floating calculator widget

150 Calculators & Converters
★ Algebra, Geometry, Electronics, Finance, Unit Converters & Misc
★ Currency converter with 180 currencies and crypto, available offline
★ Instant results as you type
★ Smart search for faster navigation
★ Create shortcuts on home screen

Custom Calculators
★ Custom tools builder for creating your own calculators
★ Up to 25 variables per calculator
★ Detailed tutorial with examples

• Percentage calculator
• Proportion calculator
• Average calculator - arithmetic, geometric and harmonic means
• Equation solver - linear, quadratic, cubic and equation systems
• Combinations and permutations
• Decimal to fraction
• Fraction simplifier
• Prime number checker
• Greatest common factor & Least common multiple
• Matrix calculator

• Triangle, right triangle, square, rectangle, parallelogram, rhombus, trapezoid, hexagon, polygon, circle, circular segment, circular sector, ellipse
• Cube, cuboid, prism, pyramid, pyramidal frustum, tetrahedron, octahedron, cylinder, truncated cylinder, cone, conical frustum, sphere, spherical cap, spherical sector, spherical segment, spherical wedge, torus

• Resistor color code - up to 6 bands
• Inductor color code
• LED resistor calculator
• Series and parallel components - resistors, capacitors, inductors
• Ohm's law
• Power triangle
• Y-Δ Transformation
• Voltage divider
• Voltage regulator - LM317
• Operational amplifier
• NE555 timer calculator
• Filters calculator
• Reactance and resonance calculator
• Wire resistance and conductance
• Transformer ratio
• Battery life calculator
• Analog-Digital converter
• Frequency calculator

• Currency converter with 180 currencies and crypto, available offline
• Sales tax calculator
• Tip calculator
• Simple and compound interest calculator

Unit Converters
• Angle converter
• Area converter
• Cooking converter
• Data storage converter
• Energy converter
• Force converter
• Fuel converter
• Length converter
• Weight converter
• Numeric base converter
• Power converter
• Prefixes converter
• Pressure converter
• Roman numerals converter
• Shoe size converter
• Speed converter
• Temperature converter
• Time converter
• Volume converter
• Acceleration converter
• Airflow converter
• Density converter
• Inertia converter
• Torque converter
• Voltage converter
• Current converter
• Charge converter
• Conductance converter
• Field strength converter
• Resistance converter
• Resistivity converter
• Capacitance converter
• Inductance converter
• Flow converter
• Flux converter
• Permeability converter
• Viscosity converter
• Heat converter
• Light converter
• Magnetism converter
• Radiation converter
• Frequency converter
• and more…

• Date calculator
• Time calculator
• Analytical geometry - distance between 2 points, area of triangle, equation of circle and equation of sphere
Updated on
Apr 30, 2022

Data safety

Developers can show information here about how their app collects and uses your data. Learn more about data safety
No information available
11K reviews
July 17, 2019
Awesome app! I like to be able to convert measures for a lot of everyday things like cooking, temperatures or miles and usually I will do an online search and have to hop around until I find a simple answer without having to read a page of text that goes along with those converter(s). This app in contrast puts everything in one place. Pretty simple to use after exploring all the things it has to offer, which is a lot. Very good time saver. Highly recommended!
22 people found this review helpful
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Don Paikoff
June 1, 2019
I Really don't like that it does NOT rotate on my LG Android phone to landscape. Also, why couldn't you include a proper history that's truly a functioning long term history. One that can be managed, that way delete everything IS NOT the only option. It's far more efficient to retrieve equations/formula's and results from history then trying to recollect, rebuild and re-calculate from scratch. AND, When assessing what-if scenario's, retrieval of historical work & data saves time and money!
15 people found this review helpful
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Dee Kae
March 6, 2021
I'm a person who has to download and try all recent apps and narrow down to a favorite and this calc app is best I've found so far. This is namely for people who like customization and a lot of available features. It is the most convenient and quick-to-access unit converter and calculator. Enough options to satisfy most anyone. Every feature has an available shortcut which makes it integrate or enables utilization by many other apps such as Tasker. Great job and thanks for the customization.
11 people found this review helpful
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What's new

CalcKit v4.2.2

• Fixed floating calculator crash on Android 11 and 12
• Added new functions to custom tools (mod, gcd, lcm)
• Implemented formulas for Choice variables
• Added first 15 tools to the community library
• Removed white-spaces when copying calculator result
• Other small changes and bug-fixes

Full Release Notes:

If you find any problem, please contact us and we will try to resolve it as soon as possible!