Free Tools
Tools
36 simple, free calculators, quizzes and word tools. No sign-up, no catch.
Money
Calculators for saving, investing, debt and everyday financial decisions.
Compound Interest Calculator
See what your savings become over time — and how much of it is growth you never deposited.
Open tool →Debt Payoff Calculator
Compare the snowball and avalanche methods and see which clears your debt faster and cheaper.
Open tool →True Cost Calculator
See what a purchase really costs — in hours of your life, and in the future money it could become.
Open tool →Savings Goal Calculator
Set a target and a date, and see exactly how much to save each month to reach it.
Open tool →Loan & Mortgage Calculator
Find the monthly payment on any loan or mortgage — and the total interest over its life.
Open tool →Inflation Calculator
See how inflation erodes buying power — what your money will really be worth over time.
Open tool →Net Worth Calculator
Add your assets, subtract your debts, and see the one number that tracks your real financial progress.
Open tool →Emergency Fund Calculator
Work out how much you need to cover 3 to 6 months of essentials — and track your progress there.
Open tool →Rule of 72 Calculator
Estimate how long it takes to double your money at any return, with the fastest math in investing.
Open tool →Retirement Savings Calculator
Find how much you need to retire with the 4% rule, and see whether your plan gets you there.
Open tool →Salary to Hourly Converter
See any wage as hourly, daily, weekly, monthly and yearly — the same pay, every way.
Open tool →Take-Home Pay Calculator
Estimate your net salary after federal tax, FICA and state tax, with your effective rate.
Open tool →Credit Card Interest Calculator
See how long your balance takes to clear and the true cost of the interest along the way.
Open tool →Break-Even Point Calculator
Find how many units you need to sell before a product starts making money.
Open tool →Salary & Paycheck Calculator
Convert hourly to annual pay and estimate your real take-home per month, week and paycheck.
Open tool →Everyday
Quick, practical calculators and converters for daily life.
Percentage Calculator
Everyday percentages made easy — a percent of a number, percentage change, tips and discounts.
Open tool →Age Calculator
Your exact age in years, months and days — plus total days lived and a birthday countdown.
Open tool →Tip Calculator
Work out the tip and total, and split the bill evenly across the table.
Open tool →QR Code Generator
Turn any text or link into a QR code and download it as a PNG — free, instant, and private.
Open tool →Word Counter
Count words, characters, sentences and reading time as you type — instantly, in your browser.
Open tool →Unit Converter
Convert length, weight, volume and temperature — cm to inches, kg to pounds, °C to °F and more.
Open tool →GPA Calculator
Add your courses, grades and credit hours to get your GPA on the standard 4.0 scale.
Open tool →Health
Simple estimators for your body and wellbeing.
Mind & Body
Interactive tests for sleep, perception and reflexes.
Sleep Cycle Calculator
Find the best bedtime or wake-up time based on 90-minute cycles, so you wake up refreshed.
Open tool →Chronotype Quiz
Morning lark or night owl? Six questions to find your body clock and how to plan around it.
Open tool →Reaction Time Test
Wait for green, then click as fast as you can. Measure your reflexes in milliseconds.
Open tool →Optical Illusion Test
Four classic illusions that fool almost everyone — and the reason your brain falls for each.
Open tool →Psychology
Quick quizzes that reveal how your mind works.
Cognitive Bias Quiz
Which thinking bias shapes your decisions most? Six scenarios reveal it — and how to counter it.
Open tool →Procrastination Quiz
How bad is your delaying habit, really? Eight questions and a fix matched to your result.
Open tool →Attachment Style Quiz
Secure, anxious, avoidant or fearful-avoidant? Discover how you bond and connect.
Open tool →Decision Fatigue Self-Check
See how much daily decision-making is draining you, and how to protect your best choices.
Open tool →Mandela Effect Quiz
Eight famous false memories. How many does your brain get confidently wrong?
Open tool →Personality Trait Quiz
Find your most pronounced trait with a mini quiz built on the Big Five — the model psychologists trust.
Open tool →Word Games
Word finders and text tools for games, writing and puzzles.
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