Thinkery Tools

Focus timer with work/break cycles

Countdown timer and stopwatch combo

See time melt away. A visual countdown disk for focus sessions.

Create visual daily routines for children with timers and rewards

Live countdown to any date

Color-coded countdown timer with warning and danger thresholds for presentations

Exam timer with per-question time tracking, progress bar, and pace alerts

High-precision stopwatch with lap recording, best/worst comparison, and live stats

Drag-drop interval sequencer for Tabata, HIIT, EMOM, Pyramid, AMRAP — 8 presets, repeat blocks, audio cues

Sort tasks into Do, Schedule, Delegate, or Eliminate quadrants

Calculate tips and split bills

Visualize how your investments grow over time

Calculate monthly payments and amortization

Convert currencies with real-time exchange rates

Plan how much to save each month to hit your target

Final price after discount

Calculate margin and markup

Quebec tax, simplified

CPI-adjusted purchasing power, Canada & US

Compare Snowball and Avalanche strategies with month-by-month simulation

Find optimal bedtime based on sleep cycles

Estimate your due date

Calculate Body Mass Index with WHO categories — metric and imperial

Calculate running pace, finish time, or distance with splits table

Calculate your Basal Metabolic Rate using the Mifflin-St Jeor formula

Calculate your Total Daily Energy Expenditure with activity-adjusted calorie targets

Calculate your daily calorie needs for weight loss, maintenance, or muscle gain

Calculate your daily macronutrient targets based on your TDEE and fitness goal

Calculate the daily calorie deficit needed to reach your target weight by a specific date

Estimate body fat percentage using the US Navy circumference formula

Compare Devine, Robinson, and Miller ideal weight formulas side by side

Calculate lean body mass via body fat percentage or the Boer formula

Calculate your daily water intake based on weight, activity level, and climate

Calculate your daily protein needs with min, optimal, and max ranges by fitness goal

Width & height from any aspect ratio

Add and subtract HH:MM:SS durations

Three modes, one tool

Days between dates

Measure any space

Celsius, Fahrenheit, Kelvin

Custom random numbers

Calculate exact age in years, months, and days

Calculate fuel consumption in L/100km or MPG with cost estimate

Compare the cost of driving an electric vehicle vs gasoline per trip, monthly, and annually

Calculate weighted GPA on 4.0 or 4.3 scale with letter grades and credits

Convert units across 6 categories: length, weight, volume, area, speed, and data

Convert times between 19 world timezones with DST support

Count words, characters, sentences, and reading time

Test your typing speed and accuracy

Social media platform limits

Instant placeholder text

Calculate reading time by WPM with slow, average, and fast speed modes

Calculate speech duration by WPM with conversational and presentation modes

Generate strong, secure passwords

Pick colors and convert HEX, RGB, HSL

Decimal, binary, hex, octal

Create QR codes instantly

Format, validate, and minify JSON with syntax error detection

Generate cryptographic hashes from any text using Web Crypto API

Check password strength with score, crack time estimate, and criteria checklist

Compare two texts line by line and highlight additions and deletions

Generate 5-color palettes using complementary, analogous, triadic, split, or monochromatic harmony

KB, MB, GB, TB and KiB, MiB, GiB, TiB

Live ECMAScript regex tester with match highlighting and replace mode

Two-way Base64 with URL-safe mode and UTF-8 support

Encode/decode URLs with encodeURIComponent vs encodeURI and a URL parser

Generate UUID v4 and v7 identifiers in bulk

Decode JWT header, payload, claims, and verify HS256 signatures

Convert text to camelCase, snake_case, kebab-case, and 11 more

Visual UNIX cron editor with human-readable description and next-5-runs preview

Live generator for gradients, shadows, filters, transforms. 7 presets (Glassmorphism, Neumorphism, Retro, Brutalist, Soft, Neon, Cyberpunk). Copy as CSS, inline, or Tailwind arbitrary values. Share URL.

Convert Unix timestamps to human-readable dates and back — seconds, milliseconds, UTC and local

Check color contrast ratios against WCAG 2.1 AA and AAA standards for accessible web design

Convert any text to URL-friendly slugs with accent normalization and custom separators

Build tables visually and export as GitHub Flavored Markdown with alignment control

Convert ppm to mg/m³ and back, with adjustable temperature and pressure. Standard ACGIH conditions by default (25 °C, 1 atm).

Compute time-weighted average concentrations across multiple samples. Three modes: measured period, full 8 h with zero residual, or 8 h with constant residual.

Convert between pressure (Pa, kPa, atm, psi, in H₂O, mm Hg…), flow (cfm, scfm, m³/h, L/min), air velocity (fpm, m/s) and aerosol concentrations.

Add sound levels logarithmically: L_total = 10·log10(Σ 10^(L_i/10)). Works for dBA, dBC and linear dB.

Compute sound levels at a target distance for point sources (-6 dB per doubling) or line sources (-3 dB per doubling) under free-field assumptions.

Compute volumetric flow rate from air velocity and duct cross-section. Round, rectangular, or direct area input. Output in m³/s, m³/h and cfm.

Compute ACH from airflow and room volume, or required airflow from a target ACH. SI and imperial units supported.

Check exposure peaks against STEL/VECD or the ACGIH default excursion rule (3× / 5× of the TWA). Ceiling check optional.

Compute the WBGT index for indoor (no solar load) or outdoor (with solar load) conditions. Output in °C, °F and K.

Estimate effective sound level at the eardrum from NRR using the CCOHS Canadian method (50% / 70% / 65% derating). Single or dual protection.

Convert between velocity pressure (in H₂O, Pa) and air velocity (fpm, m/s) with optional density correction for non-standard temperature and pressure.

Compute cumulative noise dose and equivalent 8-hour TWA using NIOSH (3 dB / 85 dBA), OSHA (5 dB / 90 dBA), or Quebec RSST (3 dB / 85 dBA, since June 2023).

Compute the intensity at a target distance from a point source: I₂/I₁ = (d₁/d₂)². Useful for radiation dose-rate estimates in free space.

Convert cooking units: cups, oz, grams, ml

Flip coins and roll dice with animations

Shuffle any list using the Fisher-Yates algorithm

Fun voice control game for kids with five animal levels and streak tracking

Spin a customizable wheel to make random decisions

Tap to measure BPM with sliding-window average

Calculate the exam score you need to reach your target course grade

Convert correct answers to percentage, letter grade, and GPA equivalent

Calculate your overall course grade from weighted assignments and exams

Analyze text readability with Flesch Reading Ease and Flesch-Kincaid Grade Level

Calculate water, salt, and yeast by baker's percentages for any pizza style

Calculate flour, water, levain, and salt with starter-adjusted baker's percentages

Scale any recipe by servings — multiply every ingredient by a factor

Calculate coffee and water amounts for V60, AeroPress, French Press, Espresso, and Cold Brew

Convert between fresh, active dry, and instant yeast quantities

Seasonal idle game — tap maple trees, boil sap, sell syrup. French-Canadian themed.