Assumptions Map
Surface, prioritize, and test the assumptions behind your decisions
View Guides →Tool Guides & Tutorials
In-depth guides for getting the most out of InnoviCat tools. Each guide covers practical use cases, step-by-step workflows, and expert tips — written by engineers with real-world experience.
Decisions
Health & Fitness
BAC Calculator
Estimate blood alcohol concentration with an honest uncertainty range, time until zero, and drink-drive limits for 32 countries
View Guides →Music
Binaural Beats Generator
Create binaural beats for sleep, relaxation, focus, and meditation with adjustable frequencies and session timer.
View Guides →BPM Tapper
Tap along to any song to detect its BPM — with real-time averaging and tap history.
View Guides →DTMF Tone Generator
Free DTMF tone generator with frequency reference table. Play all 16 touch-tone signals (697–1633 Hz), dial sequences, export WAV files, and generate telecom tones.
View Guides →Metronome
Free online metronome with subdivisions, speed trainer, tap tempo, and 6 time signatures.
View Guides →Rhythm Trainer
Diagnose and train your sense of rhythm — beat, inner pulse, subdivision, and imitation — with millisecond timing feedback.
View Guides →Speaker Test
Test your speakers or headphones right in your browser: check left and right channels, stereo balance, bass, full-range sweeps, and speaker polarity.
View Guides →Online Tone Generator
Free online tone generator and sine wave generator. Play pure tones from 20 Hz to 20 kHz at 0.01 Hz precision, with five waveforms, noise types, sweep and WAV export.
View Guides →Learning
Coding & Decoding
Translate messages using coding rules and patterns
View Guides →Critical Thinking
Evaluate arguments, identify hidden assumptions, and spot logical flaws. Practice critical reasoning for aptitude tests and professional decision-making.
View Guides →Data Interpretation
Analyze charts and graphs to answer data questions
View Guides →Error Checking
Spot differences between data sets quickly and accurately
View Guides →Logical Deduction
Draw valid conclusions from logical premises. Solve seating, grouping, and ordering puzzles by applying every constraint.
View Guides →Number Sequences
Find the next number in the sequence by identifying the pattern
View Guides →Numerical Reasoning
Solve word problems with percentages, ratios, and rates
View Guides →Pattern Recognition
Solve visual matrix, sequence, analogy, and odd-one-out puzzles
View Guides →Spatial Reasoning
Visualize rotations, reflections, and 3D transformations
View Guides →Verbal Reasoning
Master word analogies, odd-word-out, and verbal relationships. Practice vocabulary-based reasoning for aptitude tests and exams.
View Guides →Developer
Color Contrast Checker
Check and calculate WCAG contrast ratios between text and background colours for accessibility compliance.
View Guides →Velvet MD - Markdown Beautifier
Transform markdown into beautifully styled documents with live preview and export to HTML, PDF, or DOCX.
View Guides →Cooking
Crowd Food Calculator
Calculate food quantities per guest count for any event. Supports sit-down dinners, buffets, BBQs, and appetizer parties with 13 event presets and adjustments for kids, appetite, and duration.
View Guides →Grams to Cups Converter
Free grams to cups converter — convert grams to cups, tablespoons, and teaspoons for 50+ baking ingredients using King Arthur and USDA density data.
View Guides →Meat Temperature Guide
Interactive meat temperature chart with USDA safe temps, chef-preferred doneness, and pull temperature calculator.
View Guides →Nutrition Label Generator & Recipe Analyzer
Free nutrition label generator from any recipe — create FDA-compliant nutrition facts in 4 formats with macro breakdowns, daily value charts, and allergen detection.
View Guides →Recipe Scaler
Scale any recipe instantly — paste ingredients, set servings, get adjusted quantities with clean fractions. Free, private, works offline.
View Guides →Engineering
Decimal Feet Converter
Convert between feet-and-inches (with fractions) and decimal feet. Bidirectional with quick reference table.
View Guides →Duct Size Calculator
Calculate HVAC duct dimensions from airflow (CFM). Supports round and rectangular ducts with velocity validation.
View Guides →Duct System Planner
Free HVAC duct size calculator and system planner. Auto-size ducts by CFM from plenum to registers, calculate friction loss and total pressure drop per ASHRAE and ACCA standards.
View Guides →Insulation R-Value Calculator
Calculate insulation R-value for wall assemblies, attics, and floors. Check IECC 2021 code compliance by climate zone.
View Guides →Transformer Calculator
Calculate rated secondary current, ideal voltage and turns ratios, and the kVA rating a load needs, for single-phase and three-phase transformers.
View Guides →Voltage Drop Calculator
Calculate voltage drop and select optimal wire sizes for electrical circuits. Supports NEC, IEC, and BS 7671 standards with ampacity derating.
View Guides →Math
GPA Calculator
Calculate your GPA from course grades and credits.
View Guides →Grade Calculator
Calculate grades, weighted averages, final exam scores, and grade curves instantly.
View Guides →Image Tools
Image Watermark
Batch watermark photos with text, logos, tiling, 18 fonts, and ZIP download
View Guides →Spectra Image Generator
Generate royalty-free images with 237 generative art styles. Perfect for backgrounds, placeholders, and creative projects.
View Guides →Text
InnoviCat Lorem
Generate placeholder text with 26 generators, 7 output types, and vocabulary statistics.
View Guides →Time
Time Calculator
Add, subtract, multiply, and divide hours, minutes, and seconds easily.
View Guides →Time Zone Converter
Find the time difference between any two cities. Convert times across 600+ cities using the IANA time zone database with DST handling, UTC offsets, and a meeting planner.
View Guides →