TechCalc+ Calculator

Roaming Squirrel Software

About this app

TechCalc+ is the "Swiss Army Knife" of Scientific Calculators ... 44 Calculation Options + a Scientific Reference Section + the Periodic Table of the Elements!

Perfect for all aspects of scientific and engineering calculations in school, university and throughout your career. Why not download it now and give it a try?

Modes included in the main menu are:

● Basic Calculator - Algebraic and Reverse Polish Notation (RPN),
● Scientific Calculator - Algebraic and Reverse Polish Notation (RPN),
● 64-bit Programmer Calculator (Hex, Oct, Bin and Dec) - Algebraic and Reverse Polish Notation (RPN),
● Graphs (Functions, Implicit Equations, Parametric Equations, XY Scatter Plot and 3D Surface Plot),
● Matrices - including Inverse, Transpose, Determinant, Cofactor, Adjugate, Trace, Rank, Eigenvalues, Eigenvectors, Decompositions (LU, Cholesky, QR, Singular Value),
● Complex Numbers (Cartesian, Polar, using Euler's identity),
● Quick Formulas (includes 58 classic scientific formulas plus the ability to add your own custom formulas),
● Quick Converter,
● Time Calculator,
● Equation Solver (Linear Equations, Roots of a Polynomial Equation, Exponents of an Exponential Equation, Inequations, Factorization of Polynomials, GCD of 2 Polynomials, LCM of 2 Polynomials, Binomial Expansion & Vector Arithmetic),
● Calculus - including Symbolic Algebra (Derivatives, Definite Integrals, Taylor Series, Indefinite Integrals & Limits)
● Financial (Simple Interest; Compound Interest; Cash Flow; Amortization; Growing Annuity; Cost, Sales, Margin & Markup; Break-Even; Depreciation; Bonds; Days Calculation; Interest Conversion; Options Trading - Greeks)

+ the Periodic Table of Elements!

Features include:

● All Trigonometric operations (radians, degrees or gradients)
● Powers & Roots
● Logs and Antilogs
● Factorial, Modulus & Random Numbers Functions
● HCF, LCM, Prime Factors
● Pol() & Rec() Functions
● Permutations (nPr) and Combinations (nCr)
● Statistics (30 different functions!)
● Conversions (35 different categories!)
● Physical and Astronomical Constants (52 in total!)
● Fractions Mode
● 20 Memory Registers in each of the calculation modes
● Detailed calculation history
● Extensive Help and Reference
● Highly customizable via the Settings

The reference section includes the following calculators and converters (any, or all, of which can be moved to the main menu if required):

● ASCII Converter
● Aspect Ratio Calculator
● Balancing Chemical Equations
● Barometric Formula Calculator
● Bicycle Tire Pressure Calculator
● Body Mass Index (BMI) Calculator
● Boolean Algebra Calculator
● Characteristics of an RLC Circuit
● Color Calculator
● Coordinates Converter
● Empirical Formula Calculator
● Ephemerides Calculator
● Feet and Inches Calculator
● Fractional Bits Converter
● Geodetic Distance Calculator
● Humidity Calculations
● IEEE 754 Converter
● Interpolation Calculator
● IP Subnet Calculator
● Linear Regression Analysis
● Molecular Weight Calculator
● Number Base Converter
● Numerical Sequences
● Percentage Calculator
● pH Calculator
● Polygon Area Calculator
● Proportion Calculator
● Roman Numeral Converter
● Sigma and Pi Notation
● Statistics (Grouped Data)
● Unit Price Comparison
● Wind Chill Calculator

The reference section also includes the following information:

● Physical Laws
● Mathematical Tables
● Elementary & Linear Algebra
● Trigonometric Identities
● Differentiation & Integration Rules
● Statistics Formulas
● Vector Mathematics
● Names in the Metric System
● Cooking Temperature Scales
● Beaufort Wind Scale

Please email any questions that are not answered in the Help section.

Ratings and reviews

I am the electrical engineer in a university supporting physics, chemistry, geology, biology, and others. I could NOT get by without this calculator. I use the units conversion section almost daily- weather research station, machinist, etc. The formulas and quick converters are invaluable for any scientist, engineer, or technician. When i considered moving to an iPhone, i chose not to primarily because there is nothing like TechCalc+. I recently had a problem; service was instant and impressive

How does this not have a review? Or are they hidden from view? This is a great calculator app! It's one of my must-haves on any Android system. I've had it for years since before my Android 4.4.2 tablet, which I still use! Minor issue: Suddenly noticed missing tactile feedback on the number zero "button". All other buttons have this feedback (afaik), but not that one. When did that start? On v 4.8.5 on my old android 4.4.2 tablet it works btw. I see it's still updated, amazing! Thank you!

This really is the best calculator app going but it's so much more than that. After years of using it I've just stumbled across an entire reference section that I didn't even realise was buried in there. Amazing! I love the interface, please don't ever change it :) I don't think it can be bettered. It's not gimmicky like so many other attempts at this sort of thing it just works, efficiently and elegantly. Proper 5 stars, thanks for making such a great app.

What’s new

ver 5.2.4:
★ Conversion Factors (Exchange Rates): expanded the list of currencies (SLE, XCG, ZWG)
★ minor bug fixes and library updates