CalcKit: All-In-One Calculator

Contains adsIn-app purchases
11.4K 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
Jan 26, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
App info and performance and Device or other IDs
Data is encrypted in transit
You can request that data be deleted
11.4K reviews
D. Kwon
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.
23 people found this review helpful
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A Google user
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!
25 people found this review helpful
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John Foreman
March 6, 2021
This tool does all I need and love that the functionality it did not have I was able to add through a custom function. Really good tool. I'm wholeheartedly giving 5 stars without reservations. But nothing is ever perfect. It does take a lot of clicks to move around in the functionality and some minor inconsistencies in behavior - but all very minor things. I replaced the RPN calculator I had been using for years and was happy with as this one is simply better. Thank you! (purchased upgrade to remove adds - happy to send the $)
12 people found this review helpful
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What's new

CalcKit v5.0.0

• Released the first official stable version of the CalcKit Web App.
• Added 4 new Finance calculators
• Improved Interest calculator
• Added the option to create and restore full backups of CalcKit
• Added 6 new tools to the Community Library
• Updated all libraries to the latest versions
• and more...

The full release notes for each update can be found on

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