104 everyday calculators that get the numbers right.
Dates and time, pets, home costs, hobbies, entertainment, sizes and travel. No signup, no paywalls.
Browse · 8 topics
Time & Dates 10 calculators
Time & Dates overview
- Age CalculatorYour exact age in years, months and days
- Date DurationDays between any two dates
- Day of the Week CalculatorWhat day of the week any date falls on
- Days Until CalculatorCount down to any date
- Hours CalculatorHours between two clock times
- Sunrise & Sunset CalculatorSunrise, sunset and golden hour
- Time Card CalculatorAdd up work hours and pay
- Time ConverterSeconds, minutes, hours and days
- Time Zone ConverterConvert between time zones
- Week Number CalculatorThe week number for any date
Pets & Animals 32 calculators
Pets & Animals overview
- Aquarium Heater Size CalculatorAquarium heater wattage you need
- Aquarium Size CalculatorFish tank volume and capacity
- Bird Age Calculator (Parrot & Companion Birds)Your bird's age vs. its species lifespan
- Cat AgeCat years to human years
- Cat Food CalculatorHow much to feed your cat
- Cat Litter Usage CalculatorMonthly litter use and cost
- Chicken Feed CalculatorFeed for your backyard flock
- Dog AgeDog years to human years
- Dog Body Condition Score CalculatorYour dog's body condition score
- Dog Crate Size CalculatorThe right crate size for your dog
- Dog Food CalculatorHow much to feed your dog
- Dog Heat Cycle CalculatorWhen your dog's next heat is due
- Dog Medication Dosage by Weight CalculatorDog medication dose by weight
- Dog Pregnancy Due Date CalculatorYour dog's whelping due date
- Dog Travel Crate Size CalculatorAirline travel crate size
- Dog Water Intake CalculatorHow much water your dog needs
- Fish Tank Stocking CalculatorHow many fish your tank can hold
- Goat Gestation CalculatorA goat's kidding due date
- Horse Feed CalculatorDaily feed for your horse
- Horse Gestation CalculatorA mare's foaling due date
- Horse Weight Tape CalculatorEstimate your horse's weight
- Kitten Weight CalculatorHow old your kitten is by weight
- Litter Box Count CalculatorHow many litter boxes you need
- Pet Care Cost CalculatorWhat a pet costs each year
- Pet Insurance Cost EstimatorEstimate pet insurance premiums
- Pond Fish Stocking CalculatorHow many koi your pond can hold
- Puppy Food Transition CalculatorSwitch dog foods day by day
- Puppy Weight PredictorHow big your puppy will get
- Rabbit Age CalculatorRabbit years to human years
- Reptile Tank Heating CalculatorBasking bulb wattage for a reptile
- Saltwater Aquarium Salinity CalculatorSalt mix for a saltwater tank
- Tortoise Age CalculatorEstimate your tortoise's age
Home & Household 12 calculators
Home & Household overview
- Firewood Cord CalculatorCords of firewood you need
- Home Renovation Budget CalculatorRenovation cost and resale ROI
- House Cleaning Cost CalculatorWhat house cleaning costs
- Laundry Cost CalculatorCost per laundry load
- Lawn Care Cost CalculatorYearly lawn care cost
- LED Savings CalculatorSavings from switching to LEDs
- Moving Cost EstimatorEstimate your moving costs
- Pool Chemical CalculatorChlorine and pH doses for your pool
- Power Outage Cost CalculatorWhat a power outage costs you
- Solar Panel Savings CalculatorSolar savings and payback
- Solar ROI CalculatorSolar payback and lifetime savings
- Wind Chill & Heat Index CalculatorWind chill and heat index
Hobbies & Interests 20 calculators
Hobbies & Interests overview
- BPM CalculatorBPM to note lengths and delay times
- Crop Yield & Profit CalculatorCrop yield, revenue and profit
- Daily Habit Cost CalculatorThe lifetime cost of a daily habit
- Depth of Field CalculatorDepth of field for your lens
- Gift Budget CalculatorPlan your gift spending
- Golf HandicapYour golf handicap
- Irrigation Water Need CalculatorCrop water needs and irrigation cost
- Knitting CalculatorYarn, gauge and stitches for a project
- Livestock Feed Cost CalculatorWhat livestock feed costs
- Lottery Tax CalculatorYour lottery jackpot after taxes
- Moon Phase CalculatorTonight's moon phase
- Music BPMBeats per minute and tempo
- Music Practice Time & Goal CalculatorPractice hours to reach your goal
- Noise Exposure CalculatorDaily noise dose and hearing risk
- Photography Exposure CalculatorCamera exposure and equivalent settings
- Planet Visibility CalculatorWhich planets you can see tonight
- Plant Watering CalculatorHow often and how much to water
- Print Resolution CalculatorHow big you can print a photo
- Sleep Time CalculatorBest bedtime by sleep cycles
- Telescope Magnification CalculatorTelescope magnification and field
Entertainment & Games 12 calculators
Entertainment & Games overview
- Audiobook Speed CalculatorListening time at faster speeds
- Blackjack Basic Strategy & House Edge CalculatorBlackjack strategy and house edge
- Kelly Criterion Bet Sizing CalculatorOptimal bet size with Kelly
- Movie Marathon CalculatorRuntime for a movie marathon
- Podcast Binge CalculatorTime to catch up on a podcast
- Poker Pot Odds CalculatorPoker pot odds and equity
- Reading Time CalculatorHow long a book will take to read
- Roulette Odds CalculatorRoulette odds and house edge
- Sports Arbitrage (Arb) CalculatorFind and split a sure-bet arbitrage
- Streaming vs Cable Cost CalculatorStreaming vs. cable cost
- TV Series Marathon CalculatorWatch time for a TV series
- Wedding Budget CalculatorPlan your wedding budget
Clothing & Sizes 8 calculators
Clothing & Sizes overview
- Bra Size CalculatorFind your bra size
- Clothing Cost Per Wear CalculatorTrue cost per wear of clothing
- Clothing Size ConverterUS, EU and UK clothing sizes
- Clothing Size Converter (International)Clothing sizes across 7 countries
- Fabric Yardage CalculatorFabric needed for a sewing project
- Outfit Budget & Style ROI CalculatorYour yearly clothing spend
- Ring SizeFind your ring size
- Shoe SizeUS, EU, UK and cm shoe sizes
