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303 public tool URLs 299 matching guides 12 useful categories
Every tool should explain itself
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Check the basics
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Calculator hub Math, school, statistics, geometry, number, and everyday calculation tools. Finance calculators Mortgage, loan, salary, tax, investment, and interest estimate tools. Health and fitness estimates BMI, calorie, body fat, pregnancy, heart-rate, and fitness calculators. Home project calculators Concrete, paint, flooring, roofing, rebar, wallpaper, and material planning tools. Browser AI tools Private browser-side AI helpers for OCR, text, tone, keywords, and reading level. Free calculator resources A curated resource page for students, teachers, writers, and community links.
Things people usually need fast
Shortcuts for the stuff that comes up a lot: discounts, loans, wallpaper rolls, OCR, power conversions, and quick guides.
Convert watts to amps Use watts, voltage, and phase to estimate current, then read the guide before using the number near real electrical work. Watts to amps guide See why the same watts can mean different amps when voltage or phase changes. Plan wallpaper rolls Estimate roll counts, pattern repeat, and waste percent so a room project does not come up short. Wallpaper calculator guide Learn what waste percent means and why pattern repeat can change the final roll estimate. Turn an image into text Run OCR in the browser, check image quality, and understand where text recognition can make mistakes. OCR tool guide Use better photos, cleaner contrast, and realistic expectations for browser text recognition. Search the full library Find calculators, converters, AI tools, and plain-English guides from one searchable starting point. Read the guide library Open tool walkthroughs that explain inputs, examples, mistakes, and result limits.
Recently added tools
New tools for BMI checks, power conversions, golf handicaps, economics, and everyday finance math.
Underweight BMI Calculator Check adult BMI against the underweight screening threshold with careful safety notes. Open Overweight BMI Calculator Check adult BMI against overweight and obesity screening categories. Open Nutrition Points Calculator Create a transparent food-label score from calories, saturated fat, added sugar, sodium, fiber, and protein. Open Love Calculator Type two names and get a silly match score for fun. Open GDP Calculator Estimate gross domestic product from consumption, investment, government spending, exports, and imports. Open Horsepower Calculator Convert mechanical horsepower, metric horsepower, watts, and kilowatts. Open Engine Horsepower Calculator Estimate engine horsepower from torque and RPM with optional drivetrain loss. Open Golf Handicap Calculator Estimate score differential, course handicap, and playing handicap from the numbers on your scorecard. Open
Quick calculators people open a lot
Start with a common calculator, or use search when you need something more specific.
Mortgage Calculator Estimate monthly principal, interest, taxes, insurance, PMI, and HOA costs. Open Loan Calculator Estimate a fixed monthly loan payment, total paid, and total interest from amount, rate, and term. Open Age Calculator Calculate exact calendar age in years, months, days, and total days. Open Date Calculator Count days between dates or move a calendar date forward or backward. Open Percentage Calculator Find percentages, percent change, discounts, markups, and reverse percentages. Open Fraction Calculator Add, subtract, multiply, divide, and simplify fractions with steps. Open Scientific Calculator A free scientific calculator for trig, logs, roots, powers, and constants. Open Random Number Generator Generate random numbers in a custom range, with unique, sorted, and copied results. Open Password Generator Generate strong random passwords with length, character sets, and ambiguity controls. Open Conversion Calculator Convert length, mass, volume, and temperature units with clear formula steps. Open Statistics Calculator Calculate count, sum, mean, median, mode, range, quartiles, variance, and standard deviation. Open Triangle Calculator Find triangle area, perimeter, angles, and type from three side lengths. Open BMI Calculator Estimate adult body mass index and healthy BMI weight range. Open Calorie Calculator Estimate daily calories from BMR, activity level, and goal. Open Compound Interest Calculator Estimate compound growth with deposits, rate, time, and compounding frequency. Open Sales Tax Calculator Find sales tax and final total from a subtotal and local rate. Open
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Calculators
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Text ToolsWord counts, case changes, cleanups, and formatting helpers.
Date & TimeDate differences, time zones, countdowns, and scheduling helpers.
FinanceSavings, budget, payment, interest, and comparison tools.
Health & FitnessSimple wellness calculators with clear educational disclaimers.
Home & ProjectsMaterial, room, yard, and building-project estimators for rough planning.
Developer ToolsEncoding, formatting, JSON, URL, and productivity utilities.
Image ToolsSimple browser-based image helpers for daily creative tasks.
AI ToolsBrowser-only AI helpers for text, images, OCR, summaries, and writing checks.
School & StudyStudent-friendly tools for notes, math, timing, and planning.
Everyday ToolsQuick utilities for ordinary tasks, decisions, and checklists.