Solve Problems. Succeed.
Free, practical tools designed to remove obstacles and help you get things done.
What Are You Working On?
Home Improvement Project
Calculate insulation, size HVAC systems, check wiring, and plan financing.
Prep Meals & Cook
Scale recipes, convert units, and calculate nutrition for any occasion.
Design for the Web
Build color palettes, check accessibility, and optimize images.
Focus & Unwind
Boost productivity with timers, then relax with ambient sounds.
Play & Practice Music
Generate tones, keep tempo, tune instruments, learn chords, and train your ear.
Prepare Documents
Merge, compress, and sign PDFs, then polish your text.
Study & Grades
Calculate grades and GPA, work out percentages, and study the unit circle.
Make Better Decisions
Weigh options, clarify values, and think through decisions before you commit.
Plan & Organize
Count down to events, calculate dates, and keep time on your side.
Print & Create
Design custom calendars, coloring pages, craft paper, and printable sheets.
Popular Tools
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.
Time Calculator
Add, subtract, multiply, and divide hours, minutes, and seconds easily.
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.
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.
Decimal Feet Converter
Convert between feet-and-inches (with fractions) and decimal feet. Bidirectional with quick reference table.
Age Calculator
Calculate exact age from birthdate in years, months, and days.
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.
Breathing Timer
Guided breathing exercises like Box Breathing and 4-7-8 for relaxation.
Visual Timer
See time run out with color-coded countdown. 4 modes: circle, bar, sand, text. Fullscreen, classroom presets, keyboard shortcuts.
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.
Paper Generator
9 paper types: graph, dot, ruled, Cornell, isometric, hex, polar, log, and time-block — instant PDF
Grade Calculator
Calculate grades, weighted averages, final exam scores, and grade curves instantly.
Binaural Beats Generator
Create binaural beats for sleep, relaxation, focus, and meditation with adjustable frequencies and session timer.
InnoviCat Lorem
Generate placeholder text with 26 generators, 7 output types, and vocabulary statistics.
What's New
Online Tone Generator
Hearing Test and Dog Whistle sweep presets, Continuous and Tap Once play modes, notch filter with adjustable Q, every claim sourced and every language complete
Noise Machine
Gentle sleep-timer fade-out and saveable named mixes
Grade Calculator
The description, FAQ and guide say what the tool does: a share link, a history of the last 20 calculations, and a custom scale copied or imported as text; the PDF and CSV export they claimed, which the tool never had, is no longer mentioned, and every language names all the scales and the 9 languages
Music Paper
A Custom margin option sets each of the four sides from 0 to 25.4 mm, and the preview, the PDF, print and a shared link all use the same margins
Pattern Recognition
The odd-one-out prompt is shown in every language the tool ships in, where it was English in all of them
Crowd Food Calculator
Ice, drinks and tableware now follow published sources: the Reddy Ice calculator, Montgomery County's one drink per guest every 45 minutes, and tableware suppliers' rates; the plan, shopping list and widget update with every change and write numbers the way your language does; an afternoon party option plans 22.5% less food, as a party-planning guide advises between meal times
SterlingCat
Calculators for the big money decisions — rent vs buy, mortgages, paying off debt, and saving. It runs in your browser, with no account.
InitiCat
An application for beginning one small thing at a time. It runs on its own site, in your browser, with no account.
Tools
Citations
4 toolsAPA, MLA, Chicago, Harvard & IEEE citations
Cooking
18 tools18 tools: conversions, baking, meat temps, brining, food cost, coffee & nutrition analysis
Decisions
9 toolsExplore, decide, and follow through
Developer
19 toolsJSON formatter, Base64, URL encoder & hash tools
Engineering
21 toolsHVAC, electrical, and measurement calculators — browser-based
Health & Fitness
6 toolsBMI, calorie, macro & body fat calculators
Image Tools
14 toolsConvert, resize, compress & edit images privately
Learning
10 toolsInteractive tools combining explanations, worked examples, and guided practice.
Math
8 toolsPercentage, ratio & everyday math calculators
Music
18 toolsMetronome, BPM tapper, tuner & tone generator
PDF Tools
11 toolsMerge, split, compress & edit PDFs privately
Printables
5 toolsPaper templates, music staff, coloring pages, calendars & craft grids
Text
4 toolsWord counter, case converter & text diff
Time
6 toolsWorld clock, time zones & date calculators
Timers
7 toolsPomodoro, stopwatch, countdown & interval timers