Everyday Tools
This category groups the practical tools you reach for when you need a quick answer, a cleaner number, or a fast utility without opening a spreadsheet or installing an app.
- Health, money, time, and conversion tools in one place.
- Built for quick checks, planning, and real-life tasks.
- Works well for people who need answers faster than a search result thread.
Featured picks in Everyday Tools
Start with the higher-interest tools below, then browse the full category list if you need a narrower utility.
Age Calculator
Turn a birthdate into exact age, total days alive, rough heartbeats, breaths, and full moons.
Bill Splitter
Enter each person's subtotal and split tax and tip proportionally. Handles unequal splits between any number of people.
BMI Calculator
Calculate your Body Mass Index in imperial or metric. See your BMI category and healthy weight range.
Body Fat Calculator
Estimate body fat percentage using the US Navy method. Supports inches and centimeters. Shows category and a visual progress bar.
Compound Interest Calculator
See how money grows over time with compound interest. Includes monthly contributions, growth chart, and year-by-year table.
Credit Card Validator
Validate card numbers with the Luhn algorithm. Detects Visa, Mastercard, Amex, Discover, and Diners.
Related topic hubs
These hubs collect nearby tools by job to be done instead of by internal category.
All Everyday Tools apps
31 apps currently live in this category.
Age Calculator
Turn a birthdate into exact age, total days alive, rough heartbeats, breaths, and full moons.
Bill Splitter
Enter each person's subtotal and split tax and tip proportionally. Handles unequal splits between any number of people.
BMI Calculator
Calculate your Body Mass Index in imperial or metric. See your BMI category and healthy weight range.
Body Fat Calculator
Estimate body fat percentage using the US Navy method. Supports inches and centimeters. Shows category and a visual progress bar.
Compound Interest Calculator
See how money grows over time with compound interest. Includes monthly contributions, growth chart, and year-by-year table.
Credit Card Validator
Validate card numbers with the Luhn algorithm. Detects Visa, Mastercard, Amex, Discover, and Diners.
Date Calculator
Calculate the difference between two dates, or add and subtract days from any starting date.
Dog Poop Tracker
Mark sections of your yard clean or dirty with a simple grid interface. Field-ready and weirdly practical.
Fibonacci Sequence
Generate Fibonacci sequences, find the Nth term, or check if a number is a Fibonacci number. Handles large values with BigInt.
File Size Converter
Convert between bytes, KB, MB, GB, TB, and PB instantly. Includes bit equivalents. Click any result to copy it.
GCD & LCM Calculator
Find the GCD and LCM of up to six numbers with step-by-step working using the Euclidean algorithm.
ISBN Validator
Validate ISBN-10 or ISBN-13 numbers, format with hyphens, and convert between the two formats.
Loan Payment Calculator
Calculate monthly payments, total interest, and a full amortization schedule for any loan.
Nap Calculator
Calculate the perfect nap length or bedtime based on 90-minute sleep cycles. Wake up refreshed every time.
Number Formatter
Format any number with custom decimal places, currency, thousands separator, and more. Shows formatted, scientific, ordinal, and word output.
Number to Words
Convert any number to words. Supports standard, currency (USD), and ordinal modes. Great for checks and legal documents.
Pace Calculator
Calculate running pace, time, or distance. Enter any two values and get the third. Includes race time predictions.
Passphrase Generator
Generate strong memorable passphrases from a 200+ word list. Customize word count, separator, capitalization, and number suffix.
Password Generator
Generate five random passwords at once with adjustable length, character options, copy buttons, and a strength readout.
Password Strength Checker
Check password strength instantly. Get entropy score, time-to-crack estimate, and improvement tips. Nothing leaves your device.
Pay Converter
Convert any salary between hourly, daily, weekly, biweekly, monthly, and annual rates. Click any result to switch modes.
Percentage Calculator
Calculate what percent of a number is, percentage change, and add or subtract percentages instantly.
Prime Factorization
Break any number into its prime factors with exponents. Also shows factor count, sum, and primality.
QR Code Generator
Generate QR codes from any URL, text, WiFi, or contact info. Customize colors and download as PNG.
Recipe Scaler
Scale any recipe up or down by changing the serving count. Every ingredient adjusts instantly.
Roman Numeral Converter
Convert numbers to Roman numerals and back. Includes a full breakdown and common reference table up to 3,999,999.
Temperature Converter
Convert between Fahrenheit, Celsius, and Kelvin instantly. Clean, fast, no extra steps.
Timezone Converter
Convert times between any two timezones instantly, with a live world clock for 9 major cities.
Tip Calculator
Split restaurant bills with custom tip percentages, quick-select tip buttons, totals, and per-person math.
Transfer Time Estimator
Estimate how long a file transfer or download takes based on file size and connection speed.
Unit Converter
Switch between length, weight, temperature, volume, and speed with live conversions.