General Utility Calculators

A curated toolbox for everyday workflows: convert data, units and typography; plan meetings across time zones; translate, encode and validate strings; generate QR/barcodes and secure passwords; solve puzzles and analyze game odds; plus a sprinkle of fun name and quiz generators.

Colors & Typography

Color Code Converter (HEX, RGB, HSL, CMYK)

Convert between HEX, RGB, HSL and CMYK with copy-ready outputs.

Typography Unit Converter (px, pt, em, rem, %)

Translate px, pt, em, rem and % for consistent, responsive type.

Data & Networking

Data Storage Converter

Convert bits, bytes, KB, MB, GB, TB and PB (SI/IEC).

Data Transfer Rate Converter

Convert Mbps, MB/s, Gbps and more for throughput and file-time math.

IP Address Subnet Calculator

Compute CIDR, masks and host ranges (IPv4/IPv6).

URL Encoder/Decoder

Percent-encode/decode safely for web and APIs.

HTML Entity Encoder/Decoder

Escape and unescape HTML entities for clean markup.

Hash Generator (MD5, SHA1, SHA256)

Create cryptographic digests for files and strings.

Time & Money

Time Zone Converter with Meeting Planner

Find overlapping work hours across cities; DST-aware.

Universal Currency Converter (with Historical Data)

Convert global currencies and browse past rates by date.

Unit Converters

Angle Unit Converter

Degrees, radians and gradians.

Area Unit Converter

Acres, hectares, ft² and m².

Energy Unit Converter

Joules, calories, kWh and BTU.

Fuel Economy Converter

MPG, L/100km and km/L.

Length Unit Converter

Miles, kilometers, feet and meters.

Power Unit Converter

Watts, horsepower and BTU/hr.

Pressure Unit Converter

Pascal, bar, atm and psi.

Speed Unit Converter

mph, km/h, m/s and knots.

Torque Unit Converter

N·m, ft·lb and in·lb.

Viscosity Unit Converter

Poise/Stokes and SI equivalents.

Volume Unit Converter

Gallons, liters, ft³ and m³.

Weight/Mass Unit Converter

lb, kg, stone and tons.

Lifestyle & Sizing

Clothing Size Converter (International)

Translate clothing sizes across US, UK, EU and more.

Cooking Measurement Converter

Convert cups, tablespoons, grams and milliliters for recipes.

Translators & Encoders

Military Time Converter

24-hour ↔ 12-hour with AM/PM.

Morse Code Translator

Encode/decode text ↔ Morse.

Phonetic Alphabet (NATO) Translator

Spell words with Alfa, Bravo, Charlie…

Roman Numeral Converter

Integers ↔ Roman numerals with subtractive rules.

Braille Translator

Text ↔ Grade-1 braille patterns.

Semaphore Flag Translator

Text ↔ flag positions/steps.

Pig Latin Translator

Playful English → Pig Latin converter.

Generators & Validators

Barcode Generator

Create barcodes (UPC, EAN, Code 128).

Credit Card Number Validator

Check digits using the Luhn algorithm.

IBAN Validator

Validate country format and checksum.

Lorem Ipsum Generator

Placeholder text by words or paragraphs.

Password Generator

Strong random passwords with custom rules.

QR Code Generator

Create QR codes for URLs or text.

Word & Puzzle Solvers

Anagram Solver

Discover anagrams from given letters.

Crossword Solver

Find words that fit pattern clues.

Mastermind Code Breaker

Crack color codes with logic.

Sudoku Solver

Instant solutions and hints.

Wordle Solver

Best guesses from known patterns.

Games & Probability

Blackjack Strategy Calculator

Optimal plays and EV by table rules.

Dice Roll Probability Calculator

Odds for single or multiple dice.

Poker Odds Calculator

Hand equities pre/post-flop.

Rock Paper Scissors Simulator

Run simulations and compare strategies.

Roulette Odds Calculator

Probabilities and payouts by bet.

Slot Machine Payout Calculator

Estimate RTP from reels and paytable.

Fun, Quizzes & Names

Biorhythm Calculator

Plot physical, emotional and intellectual cycles.

Chinese Zodiac Calculator

Discover your sign and element.

D&D Character Name Generator

Fantasy names by race/class vibe.

Dream Interpretation Calculator

Explore common dream motifs.

Fantasy Name Generator

Create names by genre and style.

Mayan Calendar Converter

Gregorian ↔ Long Count/Tzolk’in.

Spirit Animal Calculator

Lighthearted quiz for your totem.

What’s My Patronus? Calculator

Fun generator inspired by wizarding lore.