# Bam's Thinkery

> Tiny tools, real impact. A growing collection of 100+ free browser-based mini web apps spanning productivity, finance, health & fitness, math, writing, dev & design, lifestyle, industrial hygiene, students, and food & cooking. No signup, no tracking, works on mobile. Made in Montréal.

## About

Bam's Thinkery is a free collection of beautifully designed utility tools that run entirely in the browser. No account required, no hidden tracking, no paywalls. Built by a solo developer in Montréal, Canada.

## Category Hubs

- [Productivity](https://bams-thinkery.ca/tools/productivity): 10 tools — timers, focus, routines, prioritization
- [Finance](https://bams-thinkery.ca/tools/finance): 10 tools — calculators, converters, planners
- [Health & Fitness](https://bams-thinkery.ca/tools/health): 14 tools — BMR, TDEE, calories, macros, body composition, hydration
- [Math & Conversion](https://bams-thinkery.ca/tools/math): 13 tools — units, dates, percentages, temperatures
- [Writing](https://bams-thinkery.ca/tools/writing): 6 tools — word count, typing test, reading time, speech time
- [Dev & Design](https://bams-thinkery.ca/tools/dev-design): 22 tools — encoders, generators, formatters, color tools, timestamp, contrast
- [Lifestyle](https://bams-thinkery.ca/tools/lifestyle): 6 tools — cooking, coin flip, randomizer, voice meter, decision wheel, BPM
- [Industrial Hygiene](https://bams-thinkery.ca/tools/industrial-hygiene): 13 tools — exposure conversions, ventilation, noise, heat stress, radiation
- [Students](https://bams-thinkery.ca/tools/students): 4 tools — grade calculators, reading level
- [Food & Cooking](https://bams-thinkery.ca/tools/cuisine): 5 tools — pizza dough, sourdough, recipe scaler, coffee ratio, yeast conversion

## Categories

### Productivity (10 tools)

- [Pomodoro Timer](https://bams-thinkery.ca/tools/pomodoro): Focus timer with work/break cycles
- [Timer & Stopwatch](https://bams-thinkery.ca/tools/timer): Countdown timer and stopwatch
- [Visual Timer](https://bams-thinkery.ca/tools/visual-timer): See time melt away with a visual disk
- [Visual Routine](https://bams-thinkery.ca/tools/visual-routine): Step-by-step routine builder for kids
- [Countdown Timer](https://bams-thinkery.ca/tools/countdown-timer): Live countdown to any date
- [Presentation Timer](https://bams-thinkery.ca/tools/presentation-timer): Color-coded countdown for speakers
- [Exam Timer](https://bams-thinkery.ca/tools/exam-timer): Per-question pace tracker for exams
- [Lap Timer](https://bams-thinkery.ca/tools/lap-timer): Stopwatch with lap tracking and stats
- [Tabata Timer](https://bams-thinkery.ca/tools/tabata-timer): Drag-drop interval sequencer for Tabata, HIIT, EMOM
- [Eisenhower Matrix](https://bams-thinkery.ca/tools/eisenhower-matrix): Urgent/important task prioritization tool

### Finance (10 tools)

- [Inflation Calculator](https://bams-thinkery.ca/tools/inflation-calculator): CPI-adjusted purchasing power, Canada & US
- [Tip Calculator](https://bams-thinkery.ca/tools/tip-calculator): Calculate tips and split bills
- [Compound Interest](https://bams-thinkery.ca/tools/compound-interest): Visualize investment growth
- [Loan Calculator](https://bams-thinkery.ca/tools/loan-calculator): Mortgage and loan payments
- [Currency Converter](https://bams-thinkery.ca/tools/currency-converter): Real-time exchange rates
- [Savings Goal](https://bams-thinkery.ca/tools/savings-goal): Plan your savings target
- [Discount Calculator](https://bams-thinkery.ca/tools/discount-calculator): Final price after discount
- [Profit Margin Calculator](https://bams-thinkery.ca/tools/profit-margin-calculator): Calculate margin and markup
- [GST/QST Calculator](https://bams-thinkery.ca/tools/gst-qst-calculator): Quebec sales tax calculator
- [Debt Payoff Calculator](https://bams-thinkery.ca/tools/debt-payoff-calculator): Snowball vs Avalanche strategy

### Health & Fitness (14 tools)

- [Sleep Calculator](https://bams-thinkery.ca/tools/sleep-calculator): Find optimal bedtime
- [Due Date Calculator](https://bams-thinkery.ca/tools/due-date-calculator): Estimate your due date
- [BMI Calculator](https://bams-thinkery.ca/tools/bmi-calculator): Body Mass Index with WHO categories
- [Running Pace Calculator](https://bams-thinkery.ca/tools/running-pace-calculator): Pace, finish time, or distance
- [BMR Calculator](https://bams-thinkery.ca/tools/bmr-calculator): Basal metabolic rate via Mifflin-St Jeor
- [TDEE Calculator](https://bams-thinkery.ca/tools/tdee-calculator): Total daily energy expenditure by activity level
- [Calorie Calculator](https://bams-thinkery.ca/tools/calorie-calculator): Daily calorie needs for weight goals
- [Macro Calculator](https://bams-thinkery.ca/tools/macro-calculator): Protein, fat, carb targets by goal
- [Calorie Deficit Calculator](https://bams-thinkery.ca/tools/calorie-deficit-calculator): Deficit needed to reach target weight
- [Body Fat Calculator](https://bams-thinkery.ca/tools/body-fat-calculator): Navy 3-site method for body fat %
- [Ideal Weight Calculator](https://bams-thinkery.ca/tools/ideal-weight-calculator): Devine, Robinson, Miller formulas
- [Lean Body Mass Calculator](https://bams-thinkery.ca/tools/lean-body-mass-calculator): Fat-free mass from weight and body fat %
- [Water Intake Calculator](https://bams-thinkery.ca/tools/water-intake-calculator): Daily hydration target by weight and activity
- [Protein Intake Calculator](https://bams-thinkery.ca/tools/protein-intake-calculator): Daily protein target by goal and body weight

### Math & Conversion (13 tools)

- [Aspect Ratio Calculator](https://bams-thinkery.ca/tools/aspect-ratio-calculator): Width & height from any aspect ratio
- [Time Duration Calculator](https://bams-thinkery.ca/tools/time-duration-calculator): Add and subtract HH:MM:SS durations
- [Percentage Calculator](https://bams-thinkery.ca/tools/percentage-calculator): Three modes, one tool
- [Date Calculator](https://bams-thinkery.ca/tools/date-calculator): Days between dates
- [Square Footage Calculator](https://bams-thinkery.ca/tools/square-footage-calculator): Measure any space
- [Temperature Converter](https://bams-thinkery.ca/tools/temperature-converter): Celsius, Fahrenheit, Kelvin
- [Random Number Generator](https://bams-thinkery.ca/tools/random-number-generator): Custom random numbers
- [Age Calculator](https://bams-thinkery.ca/tools/age-calculator): Exact age in years, months, days
- [Fuel Consumption Calculator](https://bams-thinkery.ca/tools/fuel-consumption-calculator): L/100km or MPG with cost estimate
- [EV Cost Calculator](https://bams-thinkery.ca/tools/ev-cost-calculator): Compare EV vs gasoline driving costs
- [GPA Calculator](https://bams-thinkery.ca/tools/gpa-calculator): Weighted GPA on 4.0 or 4.3 scale
- [Unit Converter](https://bams-thinkery.ca/tools/unit-converter): Length, weight, volume, area, speed and data
- [Timezone Converter](https://bams-thinkery.ca/tools/timezone-converter): Convert times between world timezones

### Writing (6 tools)

- [Word Counter](https://bams-thinkery.ca/tools/word-counter): Words, characters, reading time
- [Typing Speed Test](https://bams-thinkery.ca/tools/typing-test): Test your WPM
- [Character Counter](https://bams-thinkery.ca/tools/character-counter): Social media platform limits
- [Lorem Ipsum Generator](https://bams-thinkery.ca/tools/lorem-ipsum-generator): Instant placeholder text
- [Reading Time Calculator](https://bams-thinkery.ca/tools/reading-time-calculator): Words → reading minutes at custom WPM
- [Speech Time Calculator](https://bams-thinkery.ca/tools/speech-time-calculator): Words → speech duration at custom speaking pace

### Dev & Design (22 tools)

- [File Size Converter](https://bams-thinkery.ca/tools/file-size-converter): KB, MB, GB, TB and KiB, MiB, GiB, TiB — SI vs IEC
- [Password Generator](https://bams-thinkery.ca/tools/password-generator): Strong, secure passwords
- [Color Picker](https://bams-thinkery.ca/tools/color-picker): HEX, RGB, HSL converter
- [Number Base Converter](https://bams-thinkery.ca/tools/number-base-converter): Decimal, binary, hex, octal
- [QR Code Generator](https://bams-thinkery.ca/tools/qr-code-generator): Create QR codes instantly
- [JSON Formatter](https://bams-thinkery.ca/tools/json-formatter): Format, validate, and minify JSON
- [Hash Generator](https://bams-thinkery.ca/tools/hash-generator): SHA-1, SHA-256, SHA-512 hashes
- [Password Strength Checker](https://bams-thinkery.ca/tools/password-strength-checker): Score, crack time, and criteria checklist
- [Text Diff](https://bams-thinkery.ca/tools/text-diff): Compare two texts, highlight changes
- [Color Palette Generator](https://bams-thinkery.ca/tools/color-palette-generator): Generate palettes from any base color
- [Regex Tester](https://bams-thinkery.ca/tools/regex-tester): Live ECMAScript regex tester with match highlighting and replace mode
- [Base64 Encoder](https://bams-thinkery.ca/tools/base64-encoder): Encode/decode Base64 with URL-safe mode and full UTF-8 support
- [URL Encoder](https://bams-thinkery.ca/tools/url-encoder): Percent-encode/decode with encodeURIComponent vs encodeURI and URL parser
- [UUID Generator](https://bams-thinkery.ca/tools/uuid-generator): Generate UUID v4 (random) and v7 (time-ordered) in bulk — RFC 9562
- [JWT Decoder](https://bams-thinkery.ca/tools/jwt-decoder): Decode JWT header, payload, claims, and verify HS256 signatures — RFC 7519
- [Case Converter](https://bams-thinkery.ca/tools/case-converter): Convert text to camelCase, snake_case, kebab-case, PascalCase, and 10 more
- [Cron Builder](https://bams-thinkery.ca/tools/cron-builder): Build or parse UNIX 5-field cron expressions with next-5-runs preview — POSIX.1-2017
- [CSS Playground](https://bams-thinkery.ca/tools/css-playground): Live generator for gradients, shadows, filters, transforms + 7 design presets
- [Unix Timestamp Converter](https://bams-thinkery.ca/tools/unix-timestamp-converter): Epoch ↔ human-readable date, ms or seconds
- [Color Contrast Checker](https://bams-thinkery.ca/tools/color-contrast-checker): WCAG 2.1 AA/AAA contrast ratio checker
- [Slug Generator](https://bams-thinkery.ca/tools/slug-generator): URL-friendly slug from any text
- [Markdown Table Generator](https://bams-thinkery.ca/tools/markdown-table-generator): Visual table builder with GFM output

### Lifestyle (6 tools)

- [Cooking Converter](https://bams-thinkery.ca/tools/cooking-converter): Cups, oz, grams, ml
- [Coin Flip & Dice](https://bams-thinkery.ca/tools/coin-flip): Flip coins and roll dice
- [List Randomizer](https://bams-thinkery.ca/tools/list-randomizer): Shuffle any list with Fisher-Yates
- [Voice Volume Meter](https://bams-thinkery.ca/tools/voice-volume-meter): Real-time dB meter with 4 volume zones
- [Decision Wheel](https://bams-thinkery.ca/tools/decision-wheel): Custom spinner wheel for random decisions
- [BPM Tap Tester](https://bams-thinkery.ca/tools/bpm-tap-tester): Tap to find tempo in beats per minute

### Industrial Hygiene (13 tools)

Free browser-based calculators for industrial hygienists, occupational chemists, and EHS professionals. Sources cited per tool (ACGIH, NIOSH, OSHA, IRSST, ASHRAE, CCOHS, CSA). Hub: https://bams-thinkery.ca/tools/industrial-hygiene

- [ppm ↔ mg/m³ Converter](https://bams-thinkery.ca/tools/ppm-mg-m3-converter): Convert atmospheric contaminant concentrations with adjustable T and P
- [TWA Calculator](https://bams-thinkery.ca/tools/twa-calculator): 8-hour time-weighted average exposure across multi-sample inputs
- [Industrial Hygiene Units Converter](https://bams-thinkery.ca/tools/industrial-hygiene-units-converter): Pressure (Pa, in H₂O, psi/psia/psig), flow (cfm, scfm, m³/h), velocity, aerosols
- [Noise Level Addition](https://bams-thinkery.ca/tools/noise-addition): Logarithmic sum of multiple sound sources, dBA/dBC/linear
- [Noise Distance Attenuation](https://bams-thinkery.ca/tools/noise-distance-attenuation): Sound level vs distance for point or line sources
- [Flow Rate Calculator](https://bams-thinkery.ca/tools/flow-rate-calculator): Q = V × A for round and rectangular ducts, multi-unit output
- [Air Changes per Hour](https://bams-thinkery.ca/tools/air-changes-per-hour): ACH for rooms, labs, offices with ASHRAE 62.1 reference values
- [STEL / Excursion Checker](https://bams-thinkery.ca/tools/stel-checker): Verify peaks against VECD/STEL or ACGIH 3×/5× excursion rule
- [WBGT Calculator](https://bams-thinkery.ca/tools/wbgt-calculator): Wet-bulb globe temperature for heat stress, indoor and outdoor
- [Hearing Protector Effectiveness](https://bams-thinkery.ca/tools/hearing-protector-effectiveness): Effective NRR via CCOHS/CSA Z94.2 derating method
- [Velocity Pressure ↔ Air Velocity](https://bams-thinkery.ca/tools/velocity-pressure-air-velocity): Pitot-tube physics with density correction
- [Noise Dose & TWA](https://bams-thinkery.ca/tools/noise-dose-twa): Cumulative noise dose with NIOSH (3 dB), OSHA (5 dB), or Quebec criteria
- [Inverse Square Law](https://bams-thinkery.ca/tools/inverse-square-law): Intensity vs distance for point sources (radiation, light, sound)

### Students (4 tools)

- [Final Grade Calculator](https://bams-thinkery.ca/tools/final-grade-calculator): What grade do you need on the final to pass?
- [Test Score Calculator](https://bams-thinkery.ca/tools/test-score-calculator): Score from correct answers out of total
- [Class Grade Calculator](https://bams-thinkery.ca/tools/class-grade-calculator): Weighted grade from assignments, tests, and finals
- [Reading Level Calculator](https://bams-thinkery.ca/tools/reading-level-calculator): Flesch-Kincaid grade level and reading ease score

### Food & Cooking (5 tools)

- [Pizza Dough Calculator](https://bams-thinkery.ca/tools/pizza-dough-calculator): Hydration, salt, yeast % by baker's math
- [Sourdough Hydration Calculator](https://bams-thinkery.ca/tools/sourdough-hydration-calculator): Levain percentages with baker's % math
- [Recipe Scaler](https://bams-thinkery.ca/tools/recipe-scaler): Scale any recipe up or down by servings
- [Coffee-to-Water Ratio](https://bams-thinkery.ca/tools/coffee-water-ratio): V60, AeroPress, French Press brew calculator
- [Yeast Conversion Calculator](https://bams-thinkery.ca/tools/yeast-conversion-calculator): Active dry, instant, and fresh yeast equivalents

## Coming Soon

- **Sync · Carry**: A couples tool that reveals perception gaps in household responsibility. Each partner independently maps tasks by ownership and weight, then gaps are revealed.