FujiBit | Online Games, Tools, and Smart Calculators

Calculators

Equation Solver

Solve Equations

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Calculus Solver

Solve derivatives and integrals

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CGPA Calculator

Calculate your CGPA

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Statistics Calculator

Calculate Statistical Variables

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Graph Calculator

Project your curves

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Financial Ratio

Measure Financial Ratios

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CLV Calculator

Calculate Customer Lifetime Value (CLV)

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Time Zone Calculator

Find out your Time Zone

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EMI Calculator

Calculate your monthly installment

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BMI Calculator

Calculate your BMI and know your health

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Business Planning

Build your Business Plan

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Calculator

Basic and Scientific Calculator

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VAT Tax Calculator

Calculate VAT Tax

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Charts and Plots

Plot your data

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Multiplication Table

Learn counting with multiplication table

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BEP Calculator

Calculate Break-Even Point

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Inequality Solver

Solve inequalities step by step

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Set Theory Calculator

Perform set operations: union, intersection, difference, and more.

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Circle Math Calculator

Solve circle related geometric problems.

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Triangle Math Solver

Solve sides, angles, area, and perimeter of triangles.

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Trigonometry Calculator

Compute sine, cosine, tangent, identities, and angle conversions.

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Coordinate Geometry Solver

Solve distance, midpoint, slope, line equations, and intersections.

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Hypothesis Testing Calculator

Run z, t, chi-square tests, get p-values, CIs, and power.

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Regression & Correlation Calculator

Fit linear regression and compute Pearson/Spearman correlation.

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Linear Programming Solver

Optimize objective functions with constraints using simplex or graphical methods.

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Curve Calculator

Plot curves and compute arc length, slope, and area.

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Number Base Calculator

Convert between binary, octal, decimal, and hexadecimal.

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Probability Calculator

Compute permutations, combinations, and event probabilities.

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Vector Calculator

Compute magnitude, dot/cross product, angles, and projections.

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GCD & LCM Calculator

Compute greatest common divisor and least common multiple.

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Boolean Algebra Calculator

Simplify boolean expressions, build truth tables, and analyze logic gates.

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Prime Number Calculator

Check primality, list primes, and factor numbers.

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Combinatorics Calculator

Compute permutations, combinations (nCr, nPr), with or without repetition.

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Matrix Solver

Perform matrix operations: addition, multiplication, determinant, inverse, and rank.

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Physics Formula Calculator

Compute various physics formulas, including motion, force, and energy.

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Complex Number Calculator

Perform operations on complex numbers (addition, subtraction, etc.).

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Logarithm Calculator

Calculate logarithms with different bases and solve logarithmic equations.

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Simplex Calculator

Compute solutions for linear programming problems using the simplex method.

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Numerical Method Calculator

Solve numerical methods like root finding and integration.

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Chemistry Calculator

Balance equations, calculate molar mass, and convert units.

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Age Calculator

Calculate your age in years, months, and days

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Credit Card Payoff

Calculate payoff time, total interest, and plan debt-free payments

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Tools

Unit Converter

Measure as you need

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Grammar Checker

Check grammars and stay accurate

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Word Dictionary

Find meanings, synonyms, and antonyms

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Pixel Painter

Paint as it your dream

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Color Picker

Get code of your chosen color

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Invoice Generator

Create Invoice Anytime

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Graph Theory Tool

Explore graphs, nodes, and edges

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Periodic Table

Interactive periodic table of elements

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Simple CV Maker

Create a basic CV in minutes

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Circuit Explorer

Interactive circuit explorer for electronics and IoT

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Earthquake Alert & History

Live USGS alerts, significant events, map, and searchable history

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CV Maker

Build your CV with live preview, themes, and PDF export

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Favicon Generator

Create favicons from images, text, or emoji

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PDF Tools

Merge, edit, compress, OCR, and convert PDFs to Word or Excel — all in your browser.

Invoice Generator

Create professional invoices and download them as PDF.

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PDF Editor

Edit PDF files in your browser — add text, draw, highlight, insert images, and download the result.

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PDF Page Crop

Drag to crop PDF pages — trim margins on one page or every page, then download.

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PDF Merge

Combine multiple PDFs into one file — reorder, then download.

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Extract PDF Pages

Pick pages from a PDF and download them separately or merged.

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Remove PDF Pages

Delete unwanted pages from a PDF, then download the result.

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PDF to Word

Convert a PDF into an editable Word document, right in your browser.

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PDF to Excel

Convert PDF tables and text into an Excel spreadsheet in your browser.

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Word to PDF

Convert a Word document into a PDF, rendered in your browser.

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Image to PDF

Combine JPG, PNG, and other images into a single PDF.

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Compress PDF

Shrink a PDF's file size and download a smaller version.

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OCR PDF

Make scanned PDFs selectable and searchable with built-in OCR.

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PDF Repair

Fix a damaged or corrupted PDF that won't open, then download.

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Image Tools

Image Crop & Resize

Drag to crop an image, lock the aspect ratio, then resize to an exact pixel size and download.

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Image Format Converter

Convert images between PNG, JPG, WEBP, BMP, AVIF and GIF — batch convert and download.

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Image Background Remover

Remove image backgrounds automatically — transparent PNG or a new background color.

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Image Compressor

Shrink image file size — pick a compression level and download a smaller file.

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Data Analysis Tools

Convert spreadsheets, profile datasets, clean messy data, learn Excel formulas, generate SQL, Python, and R code — free tools, all in your browser.

Convert to XLSX

Convert CSV, TSV, XLS, JSON, PDF, or PNG/JPG table images into Excel (.xlsx). Multi-sheet support, nothing uploaded.

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Excel Formula Generator

Pick a problem, enter your ranges, and copy a ready-made formula — SUMIF, VLOOKUP, IF, dates, text, and 30+ patterns.

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Interactive Excel Tutor

Practice formulas hands-on — type in a live spreadsheet, get hints and instant feedback across 17 guided lessons.

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Learn Excel Formulas

41 visual lessons with sample spreadsheets — SUM, IF, VLOOKUP, XLOOKUP, SUMIFS, dates, text, and step-by-step walkthroughs.

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SQL Query Generator

Build SQL for SELECT, JOIN, GROUP BY, subqueries, INSERT, UPDATE, and other common database patterns.

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Data Analysis with Python

Generate copy-ready pandas code — load CSVs, filter rows, clean data, group, merge, plot, and export. 30+ patterns.

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Data Analysis with R

Generate tidyverse/dplyr code — read CSVs, filter, mutate, group, join, ggplot2 charts, and export. 30+ patterns.

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Data Summarizer

Upload Excel or CSV and get instant column stats, missing-data alerts, top categories, and plain-English insights.

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Data Cleaning Tools

Clean CSV and Excel datasets — remove duplicates, trim whitespace, fill blanks, and standardize column names in your browser.

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Data Visualization Tools

Create bar, line, pie, scatter, histogram, box plot, heatmap, treemap, and Sankey charts from your data.

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Pivot Table Generator

Drag fields to rows, columns, and values — summarize spreadsheets with sum, count, or average, then download.

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Set Operators

UNION, INTERSECT, and EXCEPT on two tables — compare CSV or Excel datasets like SQL with a live Venn diagram.

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View All Data Analysis Tools →

Convert to XLSX, Excel tutor, formula guide, SQL/Python/R generators, cleaning, charts, pivot & set ops

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Games

Stock Market Game

Simulate stock trading and build your virtual portfolio.

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Sudoku

Play Sudoku unlimited

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Tic-Tac-Toe

Play Tic-Tac-Toe anytime

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Word Guess

Play Word game Non Stop

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Pong Game

Play Pong game as long as you can

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Snake Game

Play Snake game as long as you survive

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Wordle

Play Daily Wordle

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Angry Birds

Launch birds and destroy structures

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Arrow Game

Test your aim and reflexes

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Bridge Card Game

Play the classic Call Bridge card game

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Football Penalty

Score penalty kicks and beat the keeper

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Tutors

Math Tutor

Interactive math lessons and problem solving

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Math Trainer

Practice basic arithmetic with instant feedback

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Physics Tutor

Interactive physics lessons and tools

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Chemistry Tutor

Lessons, flashcards, element lookup, and quizzes

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Biology Tutor

Interactive biology lessons, flashcards, and quizzes

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Accounting Tutor

Learn accounting concepts interactively

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Marketing Tutor

Learn digital marketing fundamentals

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Grammar Trainer

Practice grammar with multiple choice and fill-in-the-blank

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English Listening Practice

Improve your English listening skills

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English Spoken Trainer

Practice spoken English with interactive exercises

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Word Trainer

Build your vocabulary with word training

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Medicinology

Interactive medical textbook with quizzes and bookmarks

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Chemistry

Virtual Chemistry Lab

Simulate chemical reactions online

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Organic Chemistry Tutor

Interactive lessons on bonding, reactions, stereochemistry, spectroscopy & quizzes

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Chess

PGN Viewer

Load, analyze, and autoplay chess games in PGN format

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FEN Viewer

Visualize positions, set up boards, play moves, and evaluate with a built-in engine

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Chess Puzzle Master

Solve interactive chess puzzles with hints, timers, and custom FEN/PGN import

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Chess Watch

Mobile-friendly chess clock with presets, increment, and sound effects

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Position Research

Research and analyze chess positions with engine evaluation and interactive exploration

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Game Composer

Create complete chess games, add annotations, and export to PGN

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Hummingbird Chess Engine

Free, lightweight UCI chess engine that plays fast, human-like chess — download and play in any UCI GUI

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Accounting

Ledger Book

Record and manage your financial transactions

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Journal Entries Learning

Practice and learn journal entries interactively

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Depreciation Calculator

Calculate asset depreciation with multiple methods

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IoT Tools

Password Strength Checker

Analyze password strength with entropy scoring and improvement tips

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Password Generator

Generate strong random passwords with custom length and symbols

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Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes instantly

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Hash Identifier

Paste any hash and detect the likely algorithm

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JWT Decoder

Decode and inspect JSON Web Tokens — header, payload & signature

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Encryption / Decryption

Encrypt and decrypt text with AES, DES, and other ciphers

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Base64 Encoder / Decoder

Encode and decode text or files in Base64 format

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Subnet Calculator

Calculate network range, broadcast, and usable hosts from CIDR

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Regex Tester

Build, test, and debug regular expressions with live highlighting

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UUID Generator

Generate UUID v1, v4, and v7 individually or in bulk

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chmod Calculator

Convert between symbolic and numeric Linux file permissions

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Steganography Tool

Hide or extract secret messages inside images

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View All 37 IoT Tools →

Password, hashing, encryption, ciphers, network, forensics, and more

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Infographic Blogs

Prompt Engineering & AI Chatbots

Master the art of prompting ChatGPT, Claude, Gemini and more with 8 visual techniques

SEO Step by Step

A visual infographic guide to performing SEO for a website from scratch

Simplex Method Concept

Understand the simplex method for solving linear programming problems

Simplex Arcade

Learn Linear Programming through 7 interactive game-themed missions

Building Objective Functions

Learn how to build objective functions for the Simplex Method with examples

Chess Tactics: Magic of Chess

Discover forks, pins, skewers, discovered attacks, and 10 essential tactics in this visual chess guide

Chess Engine Anatomy

Bitboards, search, and UCI — a visual infographic guide to how modern chess engines work

Chess Engine Move Generation

Pseudo-legal moves, castling, en passant, make/unmake, and perft — explained visually

Magic Bitboards Explained

O(1) rook and bishop attacks — masks, magic numbers, and lookup tables

Chess Engine Search Algorithm

Alpha-beta, iterative deepening, quiescence, transposition tables, and move ordering

Transposition Table Explained

Zobrist hashing, TT flags, depth replacement, and search cutoffs — the engine cache

UCI Protocol Explained

How GUIs talk to engines — position, go, info, bestmove, and threading

Aspiration Windows Explained

Narrow alpha-beta windows, fail-high/fail-low re-search, and iterative deepening speedups

Endgame Tablebase Explained

Syzygy WDL/DTZ, perfect endgame probes, and how engines convert tablebase results to search scores

Quiescence Search Explained

Horizon effect, capture extensions, stand pat, SEE pruning, and tactical resolution at search leaves

Iterative Deepening Explained

Why engines search depth 1, 2, 3...N instead of jumping straight to depth N — anytime results and time management

Evaluation Function Explained

Material, PSTs, tapered eval, pawn structure, mobility, and NNUE vs classical scoring

Delta Pruning Explained

Skip hopeless captures in qsearch using stand pat plus piece-value margins

Futility Pruning Explained

Skip quiet moves at low depth when static eval cannot reach alpha

Killer Move Heuristic Explained

Store beta-cutoff quiet moves per ply for faster move ordering

Late Move Reduction Explained

Reduced-depth search for late quiet moves with full re-search on fail-high

Null Move Pruning Explained

Pass-move reduced search, fail-high cutoffs, and zugzwang guards

Razoring Explained

Jump to quiescence when static eval is far below alpha — forward pruning

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