All-In-One Calculator v3.2.3

allinonecalculator.com

Contains ads • In-app purchases

About this app

Developer Description

The PERFECT Calculator with Unit & Currency Converter for Android

The original All-In-One Calculator for Android
It's a FREE, complete and easy to use multi calculator & converter.

What does it do?
Designed with simplicity in mind, it helps you solve everyday problems.
From simple or complex calculations, to unit and currency conversions, percentages, proportions, areas, volumes, etc... it does it all. And it does it good!

This is the PERFECT Calculator
Passionate development combined with constant feedback we receive from our users resulted in that we think is the best multi calculator on the store.
Featuring over 75 FREE Calculators and Unit Converters packed in with a Scientific Calculator, it's the only calculator you will need from now on on your device.

Oh, and did we say it is completely FREE?
Yes, it is free. We think everyone should enjoy this.

If you are a student, teacher, engineer, handyman, contractor or just somebody who struggles with math & conversions, you really should give this one a try.
• Use it for simple or complex calculations
• Convert units or currencies in the same app
• Enjoy easier homework or school assignments

So, on with the features...

MAIN CALCULATOR
• Clear design with big buttons
• Multiple calculator layouts
• Editable input & cursor
• Copy & paste support
• Scientific functions
• Fraction calculator
• Calculation history
• Memory buttons
• Home widget

75 CALCULATORS & CONVERTERS
• Algebra, Geometry, Unit Converters, Finance, Health, Date & time
• Currency converter with 160 currencies (available offline)
• Instant results delivered as you type
• Smart search for faster navigation

Algebra
• Percentage calculator
• Proportion calculator
• Ratio calculator
• Average calculator - arithmetic, geometric and harmonic means
• Equation solver - linear, quadratic and equation system
• Greatest common factor & Lowest common multiple calculator
• Combinations and permutations
• Decimal to fraction
• Fraction simplifier
• Prime number checker
• Random number generator

Geometry
• Shape calculators for square, rectangle, parallelogram, trapezoid, rhombus, triangle, pentagon, hexagon, circle, circle arc, ellipse
• Body calculators for cube, rect. prism, square pyramid, sq. pyramid frustum, cylinder, cone, conical frustum, sphere, spherical cap, spherical frustum, ellipsoid

Unit converters
• Acceleration converter
• Angle converter
• Length converter
• Energy converter
• Force converter
• Torque converter
• Area converter
• Volume converter
• Volumetric flow converter
• Weight converter
• Temperature converter
• Pressure converter
• Power converter
• Speed converter
• Mileage converter
• Time converter
• Digital storage converter
• Data transfer speed converter
• Numeric base converter
• Roman numerals converter
• Shoe size converter
• Ring size converter
• Cooking converter

Finance
• Currency converter with 160 currencies available offline
• Unit price calculator
• Sales tax calculator
• Tip calculator
• Loan calculator
• Simple / Compound interest calculator

Health
• Body mass index - BMI
• Daily calories burn
• Body fat percentage

Date & time
• Age calculator
• Add & subtract - Add or subtract years, months, days, hours and minutes from a date
• Time interval - Calculate the difference in time between two dates

Miscellaneous
• Mileage calculator
• Ohm's law calculator - voltage, current, resistance and power

Developed in Transylvania 🇷🇴

What's New

Version 3.2.3
Minor changes & bug fixes

In-app purchases

$1.99 - $11.99 per item

Version Information

Version: 3.2.3
Downloads: 10M+
Updated on: Nov 25, 2025
Released: Dec 17, 2016
Requires: Android 7.0

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All-In-One Calculator users say on Google Play

★★★★★

Tim Wolfe

All-In-One Calculator offers every calculator function / feature that anyone might need! You can switch modes between standard calculator or specialty calculators and/or unit converters. I especially like the unit converters whenever I need to know how many kilometers are in a mile, pounds in kilograms, etc. There are also multiple calculator variants such as algebra, geometry, finance, dates & times, etc. This calculator even keeps running totals and let's you copy to clipboard. I love it!

★★★★

Samraj Mandlik

It is actually a really good calculator, but I'd really be very grateful if you add a scientific calculator mode/layout so that I can replace the scientific calculator app (need it get used to it's layout on order to use a physical scientific calculator in my exam) on my phone with this one. It would really make this all in one. Other than that it pops a small calculator in order to enter values for any type of conversions, and that is annoying, why not a simple numeric keyboard instead!?

★★★

Brent Krous

it's a good calculator app. tons of different formulas. however, there isn't a single binary/hex/dec/etc conversion or calculator. windows comes with this.

★★