Standard Calculator
Everyday arithmetic with live expression evaluation, editing, memory functions, percentage handling, copy support and calculation history.
The complete V2 workspace
Everything in OmniCalc V2.5.
A broad collection of calculation, visualisation, formula, data and everyday tools — organised in one consistent workspace.
THE SIGNATURE V2 UPDATE / OFFLINE SOLVER BOT
Mrhid3e Solver Bot.
A built-in maths assistant that helps turn a question into understandable working — not just a number at the end.
01Step-by-step guidanceFollow the mathematical working in a clear sequence, making the method easier to learn and check.
02Offline by designUse the assistant’s core solving experience locally, without depending on an online chatbot service.
03Part of OmniCalcThe solver sits inside the same mathematics workspace as the calculators, graphing tools and formula explorer.
04Understand the processDesigned to support learning and checking by showing how a solution is approached, rather than focusing only on the final result.
As with any mathematical assistant, review the steps and verify important results.
MRHID3E∴OFFLINE · BUILT IN
01 / Everyday calculations
Start with the essentials.
Scientific Calculator
Trigonometric, inverse and hyperbolic functions; logarithms with selectable bases; powers, roots, factorials, combinations and permutations; DEG/RAD modes; and complex-result support.
Percentage Tools
Common percentage workflows including percent of a value, percentage-of-whole, increase, decrease, change, reverse percentage, discount and markup.
Date & Time
Date differences, add/subtract operations, exact age, leap-year information and time-zone conversion using named IANA time zones.
02 / Visual mathematics
See the relationships.
2D Graphing
Plot multiple Cartesian and polar functions, explore curves with pan and zoom, inspect value tables and estimate intersections. The graphing workflow is designed for common algebraic, trigonometric, exponential and other function families.
3D Graphing
Visualise three-dimensional mathematical surfaces and explore how expressions behave across two input dimensions.
Tool-specific Graph Views
Use visual graph views in the relevant mathematical tools to connect symbolic expressions, numeric results and plotted behaviour.
Equation Solver
Solve equations with one unknown and linear systems. Solutions are checked by substitution where applicable, with exact, approximate or partial results labelled appropriately.
Formula Explorer
Explore a library of 256 mathematics and physics formulas alongside your own custom formulas. Select the unknown, enter known values in the displayed SI units, and rearrange the formula to solve for the selected variable.
Formula Dimensions
Work with formula dimensions and unit relationships to make the physical meaning of quantities clearer and support dimension-aware calculations.
03 / STEM toolkit
Work beyond a single equation.
Advanced Matrix Workspace
Matrix addition, subtraction, multiplication, scalar multiplication, transpose, determinant, inverse, rank and trace, with support for matrices up to 20 × 20.
Vectors
Vector addition and subtraction, scaling, dot and cross products, magnitude, angle between vectors and unit-vector calculations.
Complex Numbers & Visualizer
Explore complex arithmetic, powers, conjugates, magnitude, argument, polar-to-rectangular conversion and nth roots with a visual complex-number workspace.
Statistics
Count, sum, mean, median, mode, minimum, maximum, range, sample and population variance and standard deviation, quartiles and interquartile range.
Regression
Fit data and inspect the regression equation, slope, intercept, coefficient of determination (R²) and predictions.
Probability & Distributions
Probability calculations and distribution-focused tools for exploring common statistical models and their values.
Number Theory
Prime testing, prime factorisation, divisors, GCD, LCM, divisibility, quotient and remainder using exact integer arithmetic.
Number Bases
Convert binary, octal, decimal, hexadecimal and bases 2–36, with two’s-complement and bit-pattern views.
04 / Practical tools
Useful beyond the classroom.
Financial Calculator
Dedicated financial calculations for common money, rate and time-based problems.
Unit Converter
Conversions across 15 categories, including length, mass, temperature, speed, area, volume, time, data, energy, power, pressure, angle and frequency.
Unit-aware Calculations
Work with quantities and their units in supported calculation and formula workflows, reducing the need to convert values manually before solving.
Custom Conversions
Create, edit, rename, duplicate, favourite, search, delete, export and import custom conversion ratios. Optional exchange-rate retrieval is user-initiated.
Constants & Formula Library
Access useful mathematical and scientific constants and a STEM formula collection, with support for custom formulas.
05 / Your workspace
Keep your work organised.
Calculation History
Search, filter, reuse, favourite, delete and export previous calculations in CSV, TXT or JSON formats.
Favorites
Keep frequently used tools, calculations, formulas and conversions together for quick access.
Mrhid3e Solver Bot
The headline V2.5 addition: an integrated offline maths-solving assistant that guides users through problems step by step, helping them follow the method instead of seeing only a final answer. No account or online chatbot connection is required for its core offline experience.
Settings & Personalisation
Configure appearance and calculation preferences, including light, dark and system themes, text-size and accessibility options where available.
07 / V2.5 refinement update
Focused fixes. Clearer mathematics.
Expanded graph coverage
Graphing coverage is refined for common and important function forms, including squared trigonometric expressions such as sin²(x), exponential functions such as eˣ and related forms.
Readable fraction layout
Formula and question displays use stacked numerator-and-denominator formatting where a fraction is present, rather than forcing the entire expression onto one line.
Clearer formula hierarchy
Formula typography is made more prominent and visually distinct from surrounding text so equations are easier to scan and understand.
Regression transparency
Regression results clearly expose the slope and intercept, making the fitted line easier to interpret and verify.
V2.5 focuses on refining the existing V2 experience: more dependable graph expressions, clearer mathematical presentation and more transparent regression results.
08 / Platforms & privacy
One project across devices.
OmniCalc V2.5 is packaged for Android and 64-bit Windows, with a standard Windows installer and a portable edition. Core tools are designed for offline use. No account is required; calculation data and preferences are stored locally. The optional exchange-rate download is initiated by the user and requires an internet connection.