Life Calculators
Everyday life calculators including age, dates, time, discounts, tips and budgets.
46 calculators
Age Calculator — Exact Age in Years, Months & Days
Free age calculator: find your exact age in years, months, and days from your date of birth, plus total days and weeks alive.
Cat Age Calculator — Convert Cat Years to Human Years
Convert your cat's age to human years with the vet-backed 15-9-4 rule. Instantly see the human-equivalent age and life stage, from kitten to geriatric.
Age in Days Calculator — How Many Days Alive
Free age-in-days calculator: count exactly how many days, weeks, months, hours, minutes and seconds you have been alive since birth.
Dog Years Calculator — Convert Dog Age to Human Years
Free dog years calculator: convert your dog's age to human years by size (small, medium, large, giant). See the life stage and vet-check milestones.
Horse Age Calculator — Convert Horse Years to Human Years
Free horse age calculator: convert horse age into equivalent human years with the standard equine piecewise aging formula.
Au Pair Cost Calculator — Annual Budget Estimator
Free au pair cost calculator: estimate annual stipend, room and board, program fee, travel, and compare total cost against daycare expenses.
Baby Cost Per Month Calculator — First-Year Budget
Free baby cost per month calculator: estimate diapers, formula, childcare, health, clothes. See monthly, annual, and first-year totals.
Baby Growth Calculator: Weight, Length & Head Percentiles
Free baby growth calculator: check your infant's weight, length and head circumference percentiles against WHO child growth standards by age and sex.
Babysitter Rate Calculator — Hourly Pay Estimator
Free babysitter rate calculator: estimate hourly pay for extra kids, after-midnight hours, weekends, holidays and tips for an evening of sitting.
Bill Split Calculator — Split Tip & Tax Among Friends
Free bill split calculator: add tax and tip, then divide the total bill evenly among any number of people. See exactly what each person owes.
Birthday Party Cost Calculator — Budget Per Child
Free birthday party cost calculator: add venue, catering, cake, decorations, entertainment and favors to estimate total spend and cost per child.
Budget Calculator — 50/30/20 Monthly Income Split
Free 50/30/20 budget calculator: split your monthly take-home income into needs, wants, and savings so you know exactly where every dollar goes.
Business Days Calculator — Count Weekdays Between Dates
Free business days calculator: count Mon-Fri weekdays between any two dates, excluding weekends and the five fixed US federal holidays. Fast, no sign-up.
Camping Cost Calculator — Total Trip Budget
Free camping cost calculator: estimate campsite nights, gear rental, food, firewood and park entry fees, then see the trip total and cost per person.
Character Counter — Count Characters, Words & Spaces
Free character counter: exact character count with and without spaces, estimated words, reading time, and progress toward a 280 or 2200 limit.
Childcare Cost Calculator — Annual Daycare Budget
Free childcare cost estimate: monthly and annual daycare, after-school care, and the federal dependent-care tax credit for one, two, or more kids.
Chinese Age Calculator — East Asian Age vs Western Age
Free Chinese age calculator: convert your birthday to traditional East Asian age (1 at birth, +1 each Lunar New Year) and compare it with Western age.
Coin Flip Probability Calculator — Binomial Odds
Free coin flip probability calculator: exact, at-least, and at-most odds of getting any number of heads in n flips, plus expected value.
Conception Date Calculator — Estimate Conception & Due Date
Free conception date calculator: estimate when you conceived, your ovulation window and estimated due date (EDD) from your last period. No sign-up.
Cost of Living Calculator — Compare City Salaries
Free cost of living calculator: compare two cities by cost-of-living index and find the equivalent salary you need to keep your standard of living.
Cost of Raising a Child Calculator (to Age 18)
Estimate the total cost of raising a child to age 18 using USDA income brackets, with housing, food, childcare and healthcare breakdowns and inflation.
Date Difference Calculator — Days Between Two Dates
Free date difference calculator: count exact days, weeks and approximate months between any two calendar dates. Fast, private, no sign-up needed.
Day of Year Calculator — What Day Number Is Today?
Free day of year calculator: find the ordinal day number of any date, days left in the year, weekday and year progress. Fast, private, no sign-up.
Diaper Calculator — Monthly & Total Baby Diaper Cost
Estimate monthly and yearly diaper cost, total diapers used until potty training, and the true cost of diapering a baby from birth.
Dice Roller Calculator — Odds, Mean & Variance of Any Roll
Free dice roller calculator: expected mean, min, max and standard deviation for 2d6, 1d20+5 and 4d6 drop lowest. RPG, board game and craps odds.
Discount Calculator — Percent Off & Sale Price Savings
Free discount calculator: compute the sale price, dollar savings, and final price with sales tax from any percent-off discount.
Disneyland Cost Calculator (Tickets, Hotel & Food)
Free Disneyland cost calculator: estimate tickets, hotel, food, and parking for your family trip. See total trip cost and price per person.
Exact Age Calculator — Years, Months, Days & Countdown
Free exact age calculator: your precise age in years, months and days from date of birth, plus decimal age and days until your next birthday.
Honeymoon Cost Calculator — Trip Budget for Two
Free honeymoon cost calculator: estimate flights for two, hotel nights, food, activities and insurance; see the total trip budget and cost per person.
Hotel Cost Calculator — Total Stay with Tax & Fees
Free hotel cost calculator: estimate your total stay with nightly rate, nights, resort fee, parking and tax; see cost per person per night.
Hours Calculator — Weekly Time Card & Gross Pay
Free hours calculator: enter clock-in, clock-out and an unpaid break to get daily and weekly work hours, plus gross pay at your hourly rate.
Moving Cost Calculator — Local & Long Distance Estimate
Free moving cost calculator: estimate local hourly crew labor + truck, long-distance weight-based shipping, and packing to total your move budget.
Parking Cost Calculator — Airport Lot vs Uber
Airport parking cost calculator: compare economy, lot, garage and valet daily rates, apply the weekly max, and see if Uber beats parking.
Password Generator — Strong Random Passwords & Entropy
Free secure password generator: create random passwords of any length with upper, lower, digits and symbols. See entropy in bits and offline crack time.
Password Strength Checker — Entropy & Crack Time
Free password strength checker: score 0-100, measure entropy in bits, estimate offline crack time, and get instant feedback to make your password stronger.
QR Code Generator — Size & Version Calculator
Free QR code generator calculator: pick error correction L/M/Q/H, then see the QR version, module matrix and exact pixel size for your link or text.
Random Date Generator: Pick a Random Day Between Two Dates
Free random date generator picks a uniform random day between any two dates. See day count, midpoint, and weekend odds before you draw.
Random Name Picker Calculator — Fair Winner Odds
Free random name picker calculator: odds of drawing a specific name from a pool, expected wins, and not-picked probability for giveaways and raffles.
Random Number Generator — Pick a Number 1 to 100
Free random number generator: draw a fair integer between two numbers, see mean, variance and odds. For raffles, picks, dice rolls and sampling.
Rent Calculator — How Much Rent Can You Afford?
Free rent affordability calculator: see your 30% rule budget, affordable monthly rent, annual rent cost, and the share of income your rent actually takes.
Road Trip Gas Calculator — Fuel Cost & Split
Road trip gas calculator: estimate gallons needed, total fuel cost, and cost per passenger for one-way or round-trip driving from MPG and pump price.
Text Case Converter — Snake, Kebab, Camel, Title & More
Free text case converter: turn any string into snake_case, kebab-case, camelCase, PascalCase, Title Case, UPPER CASE and more. Copy with one click.
Time Calculator — Add & Subtract hh:mm:ss Durations
Free time calculator: add or subtract two clock durations (hh:mm:ss) and instantly see the result in hours, minutes, seconds and total seconds.
Toll Cost Calculator — E-ZPass Discount & Round-Trip Total
Free toll cost calculator: estimate road tolls per plaza, E-ZPass discount, truck axle surcharges and round-trip total instantly.
Username Generator — Random Handle Combinations
Free username generator: build random handle combinations from adjectives, nouns and numbers. See total combinations, collision odds and uniqueness.
Word Counter — Characters, Reading Time & Target Progress
Free word counter: character count, estimated words, reading time at your wpm, and progress toward a word or character target.