Fast, free, and private calculators — built on the same math professionals use. No sign-ups, no downloads.
All your pets in one place — pick dog, cat, horse, rabbit, or hamster and convert pet years to human years, or the other way around.
Convert your dog's age to human years with the AKC size-based chart, plus a full dog-years table.
Convert your cat's age to human years with the standard vet formula and a cat-years chart.
Convert your horse's age to human years with a stage-based equine formula and a full horse-years chart.
Convert your rabbit or bunny's age to human years, with a full rabbit-years chart and life-stage guide.
Estimate your hamster's age in human years from development milestones — they grow up fast.
Mating date to due date and whelping window — plus a reverse lookup to find the mating window from the birth date.
Your cat's kitten due date and queening window — with a reverse lookup for breeders to find the mating window.
A mare's foaling due date from the breeding date — or reverse it to find the breeding window and likely sire.
Cattle calving due date from the breeding date — with a reverse lookup for producers to find the breeding window and likely sire.
Kidding due date for standard or miniature goats — with a reverse lookup to find the breeding window and likely sire.
Ewe lambing due date from the breeding date — with a reverse lookup for shepherds to find the breeding window.
Doe kindling due date plus palpation and nest-box dates — with a reverse lookup to find the breeding window.
How much feed your flock needs — total pounds, how many bags to buy, and an estimated cost, by bird stage and number of weeks.
Exact age in years, months, and days — plus the day you were born, your zodiac sign, generation, and a countdown to your next birthday.
Find your generation from your birth date — plus the full generation years chart, from the Greatest Generation to Gen Beta.
Find your half birthday — the date exactly six months from your birthday — with a countdown.
Find out when you conceived — from your due date or your baby's birthday — with a reverse due date calculator and a full due date calculator.
Find your personal angel number from your birth date — the repeating sequence you keep seeing — and what it's said to mean.
Pick any two star signs for a love-match score and a quick reading based on the four elements of astrology.
Percent of a number, what percent one number is of another, and percentage increase or decrease.
Tip amount and bill split — enter the bill, pick a tip, and divide it between any number of people.
Turn your wood stack's size into cubic feet, full cords and face cords — and see what it's worth at your price per cord.
Numbers to Roman numerals and back, plus a tattoo date maker for the classic date-in-Roman-numerals look.
Draw your room on a grid — even L-shapes and odd rooms — and get the square footage automatically, or just enter length and width.
How many tiles or boxes you need for a floor or wall, with 10–15% overage built in for cuts.
How many boxes of laminate, vinyl plank or hardwood you need, waste included.
Square yards of carpet for a room, with extra for seams and doorways.
How many gallons of paint a room needs — from the size, ceiling height and coats, with doors and windows subtracted.
How many sheets of drywall for a room's walls and ceiling, plus rough joint compound and tape.
Build a wall from its length and height — studs, plates, drywall, screws, compound and paint, all at once.
How much mulch your beds need — cubic yards, cubic feet and number of bags, from the bed size and depth.
Cubic yards, tons and bags of gravel for a driveway, path or drainage bed — pick your stone type.
Cubic yards and bags of topsoil for beds and lawns, from the area and depth.
How many rolls or pallets of sod for a lawn, with waste for cuts.
How many pounds of grass seed for a new lawn or overseeding, by area and seeding rate.
Cubic yards and bags of concrete for a slab, footing or round column — with 40, 60 and 80 lb bag counts.
How many tons of asphalt for a driveway or lot, from the area and thickness.
Roofing squares and bundles of shingles from your roof's footprint and pitch.
How many deck boards you need, with board width, length and gap accounted for.
Posts, rails and pickets for a fence run, from the length and post spacing.
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