43 free calculators · no sign-up

Quick answers for money, health and life.
Plus a few weird ones.

🤪 Kooky Originals

Strange, eye-opening calculators you won't find elsewhere.

Love CalculatorType two names, get a totally unscientific love score.Fair Rent Split CalculatorSplit rent with roommates by bedroom size.Gig Driver Real Pay CalculatorYour true hourly rate after gas, wear and taxes.Subscription Cost CalculatorWhat all your subscriptions cost per year — and over 10.Is It Worth It? (Hours of Work Calculator)Turn any price into hours of your life at work.Sleep Cycle CalculatorWhen to go to bed so you wake up between cycles.Binge-Watch CalculatorHow long it takes to finish a whole show.Your Age on Other PlanetsHow old you'd be on Mars, Jupiter and the rest.Billionth Second & Birthday MilestonesWhen you hit 1 billion seconds and your 10,000th day.Lifetime Steps CalculatorCould your steps walk you around the Earth? To the Moon?How Many Weekends Do I Have Left?Your remaining weekends and summers, counted.Coffee Habit CalculatorWhat your daily coffee really costs — and what it could have been.Pizza Value CalculatorWhich pizza deal gives you the most pizza per dollar?Meeting Cost CalculatorWhat that meeting is really costing in salaries.Your Life in HeartbeatsHeartbeats, breaths and blinks since you were born.Dog Age Calculator (Science Version)Dog years to human years — the new formula, not ×7.Screen Time Life CalculatorHow many years of your life go to your phone.When Will I Be a Millionaire?The month you hit $1,000,000 at your saving rate.

Money & Finance

Mortgage CalculatorMonthly payment with taxes, insurance and HOA included.Loan CalculatorMonthly payment and total interest for any fixed-rate loan.Auto Loan CalculatorCar payment with trade-in, down payment and sales tax.Home Affordability CalculatorHow much house can you afford on your income?Compound Interest CalculatorWatch savings grow with monthly contributions.Retirement Savings CalculatorProject your nest egg at retirement age.Savings Goal CalculatorHow much to save each month to hit a goal.Credit Card Payoff CalculatorHow long until your card balance hits zero.Inflation CalculatorWhat money will be worth in the future.Salary to Hourly CalculatorConvert annual salary to hourly, weekly and monthly pay.ROI CalculatorReturn on investment, total and annualized.Tip CalculatorTip and split the bill in seconds.Discount CalculatorSale price after percent off — including stacked coupons.Sales Tax CalculatorAdd tax to a price, or back it out of a total.

Health & Fitness

BMI CalculatorBody Mass Index from your height and weight.Calorie Calculator (TDEE)Daily calories to maintain, lose or gain weight.Body Fat CalculatorBody fat % with the US Navy tape-measure method.Pregnancy Due Date CalculatorEstimated due date from your last period.Water Intake CalculatorA rule-of-thumb daily water target.

Everyday Math

Percentage CalculatorX% of Y, percent of a total, and percent change.Age CalculatorExact age in years, months and days.Days Between Dates CalculatorDays, weeks and business days between two dates.Final Grade CalculatorWhat you need on the final to get the grade you want.Gas Cost CalculatorWhat a road trip will cost in fuel.Hours Worked CalculatorTime card math with breaks and pay.