[{"data":1,"prerenderedAt":638},["ShallowReactive",2],{"catalog":3,"page:\u002Fpets\u002Fcat-age-calculator":224},[4,37,58,91,112,143,170,197],{"path":5,"stem":6,"title":7,"short":8,"icon":9,"order":10,"calculators":11},"\u002Fwoodworking","woodworking\u002Findex","Woodworking Calculators","Board feet, deck boards, tape measure fractions and inch decimals.","i-lucide-hammer",1,[12,19,25,31],{"path":13,"stem":14,"title":15,"short":16,"icon":17,"hub":18},"\u002Fwoodworking\u002Fboard-foot-calculator","woodworking\u002Fboard-foot-calculator","Board Foot Calculator","Board feet, cost and waste for a list of boards, hardwood or softwood.","i-lucide-ruler-dimension-line","woodworking",{"path":20,"stem":21,"title":22,"short":23,"icon":24,"hub":18},"\u002Fwoodworking\u002Fdeck-board-calculator","woodworking\u002Fdeck-board-calculator","Deck Board Calculator","Deck boards, linear feet, joists and screws for any deck size.","i-lucide-rows-3",{"path":26,"stem":27,"title":28,"short":29,"icon":30,"hub":18},"\u002Fwoodworking\u002Ffraction-to-decimal-chart","woodworking\u002Ffraction-to-decimal-chart","Fraction to Decimal Chart (Inches)","Every 64th of an inch as a decimal and in mm, with a two-way converter.","i-lucide-decimals-arrow-right",{"path":32,"stem":33,"title":34,"short":35,"icon":36,"hub":18},"\u002Fwoodworking\u002Fhow-to-read-a-tape-measure","woodworking\u002Fhow-to-read-a-tape-measure","How to Read a Tape Measure","Tap any mark on an interactive tape to see its fraction, decimal and mm.","i-lucide-pencil-ruler",{"path":38,"stem":39,"title":40,"short":41,"icon":42,"order":43,"calculators":44},"\u002Fresin-and-candles","resin-and-candles\u002Findex","Resin & Candle Making Calculators","Epoxy volumes and mix ratios, candle wax and fragrance oil.","i-lucide-flask-conical",2,[45,52],{"path":46,"stem":47,"title":48,"short":49,"icon":50,"hub":51},"\u002Fresin-and-candles\u002Fcandle-wax-calculator","resin-and-candles\u002Fcandle-wax-calculator","Candle Wax Calculator","Wax and fragrance oil by weight for any jar size and batch.","i-lucide-flame","resin-and-candles",{"path":53,"stem":54,"title":55,"short":56,"icon":57,"hub":51},"\u002Fresin-and-candles\u002Fepoxy-resin-calculator","resin-and-candles\u002Fepoxy-resin-calculator","Epoxy Resin Calculator","Resin for molds, river tables and tabletop coats, split into A and B.","i-lucide-droplets",{"path":59,"stem":60,"title":61,"short":62,"icon":63,"order":64,"calculators":65},"\u002Fquilting","quilting\u002Findex","Quilting Calculators","Backing, binding, half-square triangles and quilt sizes.","i-lucide-grid-3x3",3,[66,73,79,85],{"path":67,"stem":68,"title":69,"short":70,"icon":71,"hub":72},"\u002Fquilting\u002Fhalf-square-triangle-calculator","quilting\u002Fhalf-square-triangle-calculator","Half Square Triangle Calculator","Cutting sizes and square counts for 2-, 4- and 8-at-a-time HSTs.","i-lucide-triangle-right","quilting",{"path":74,"stem":75,"title":76,"short":77,"icon":78,"hub":72},"\u002Fquilting\u002Fquilt-backing-calculator","quilting\u002Fquilt-backing-calculator","Quilt Backing Calculator","Yardage, panels and seam direction for any quilt back.","i-lucide-layers",{"path":80,"stem":81,"title":82,"short":83,"icon":84,"hub":72},"\u002Fquilting\u002Fquilt-binding-calculator","quilting\u002Fquilt-binding-calculator","Quilt Binding Calculator","Strips to cut and fabric to buy for double-fold binding.","i-lucide-frame",{"path":86,"stem":87,"title":88,"short":89,"icon":90,"hub":72},"\u002Fquilting\u002Fquilt-size-calculator","quilting\u002Fquilt-size-calculator","Quilt Size Calculator","Finished size from blocks and borders, or the right size for your bed.","i-lucide-bed-double",{"path":92,"stem":93,"title":94,"short":95,"icon":96,"order":97,"calculators":98},"\u002Fsewing-and-needlework","sewing-and-needlework\u002Findex","Sewing & Needlework Calculators","Fabric yardage, cutting plans and cross stitch fabric sizes.","i-lucide-scissors",4,[99,106],{"path":100,"stem":101,"title":102,"short":103,"icon":104,"hub":105},"\u002Fsewing-and-needlework\u002Fcross-stitch-fabric-calculator","sewing-and-needlework\u002Fcross-stitch-fabric-calculator","Cross Stitch Fabric Calculator","Finished design size and fabric to cut for any Aida or linen count.","i-lucide-grid-2x2-x","sewing-and-needlework",{"path":107,"stem":108,"title":109,"short":110,"icon":111,"hub":105},"\u002Fsewing-and-needlework\u002Ffabric-yardage-calculator","sewing-and-needlework\u002Ffabric-yardage-calculator","Fabric Yardage Calculator","Yards and meters to buy for any set of pieces, with a cutting plan.","i-lucide-ruler",{"path":113,"stem":114,"title":115,"short":116,"icon":117,"order":118,"calculators":119},"\u002Fknitting-and-crochet","knitting-and-crochet\u002Findex","Knitting & Crochet Calculators","Yarn yardage, gauge and cast-on counts, and blanket sizes.","i-lucide-spool",5,[120,126,132,137],{"path":121,"stem":122,"title":123,"short":124,"icon":90,"hub":125},"\u002Fknitting-and-crochet\u002Fcrochet-blanket-size-calculator","knitting-and-crochet\u002Fcrochet-blanket-size-calculator","Crochet Blanket Size Calculator","Blanket size chart plus the starting chain and rows at your gauge.","knitting-and-crochet",{"path":127,"stem":128,"title":129,"short":130,"icon":131,"hub":125},"\u002Fknitting-and-crochet\u002Fcrochet-hook-size-chart","knitting-and-crochet\u002Fcrochet-hook-size-chart","Crochet Hook Size Chart","US letters, millimeters and UK sizes for every hook, plus the yarn each suits.","i-lucide-fishing-hook",{"path":133,"stem":134,"title":135,"short":136,"icon":111,"hub":125},"\u002Fknitting-and-crochet\u002Fknitting-gauge-calculator","knitting-and-crochet\u002Fknitting-gauge-calculator","Knitting Gauge Calculator","Cast-on stitches and rows from your gauge, or rescale a pattern.",{"path":138,"stem":139,"title":140,"short":141,"icon":142,"hub":125},"\u002Fknitting-and-crochet\u002Fyarn-calculator","knitting-and-crochet\u002Fyarn-calculator","Yarn Calculator","Yards, meters and skeins for any project, worked out from your swatch.","i-lucide-scale",{"path":144,"stem":145,"title":146,"short":147,"icon":148,"order":149,"calculators":150},"\u002Fpool-and-aquarium","pool-and-aquarium\u002Findex","Pool & Aquarium Calculators","Pool gallons, aquarium volume and fish stocking.","i-lucide-waves",6,[151,158,164],{"path":152,"stem":153,"title":154,"short":155,"icon":156,"hub":157},"\u002Fpool-and-aquarium\u002Faquarium-volume-calculator","pool-and-aquarium\u002Faquarium-volume-calculator","Aquarium Volume Calculator","Gallons, liters and weight for rectangle, bow front, cylinder and hex tanks.","i-lucide-container","pool-and-aquarium",{"path":159,"stem":160,"title":161,"short":162,"icon":163,"hub":157},"\u002Fpool-and-aquarium\u002Ffish-tank-stocking-calculator","pool-and-aquarium\u002Ffish-tank-stocking-calculator","Fish Tank Stocking Calculator","Check your fish list against the inch-per-gallon and surface-area rules.","i-lucide-fish",{"path":165,"stem":166,"title":167,"short":168,"icon":169,"hub":157},"\u002Fpool-and-aquarium\u002Fpool-volume-calculator","pool-and-aquarium\u002Fpool-volume-calculator","Pool Volume Calculator","Gallons and liters for round, oval, rectangle and kidney pools.","i-lucide-waves-ladder",{"path":171,"stem":172,"title":173,"short":174,"icon":175,"order":176,"calculators":177},"\u002Fgarden","garden\u002Findex","Garden Calculators","Companion plants, raised bed soil and square foot garden plans.","i-lucide-leaf",7,[178,185,191],{"path":179,"stem":180,"title":181,"short":182,"icon":183,"hub":184},"\u002Fgarden\u002Fcompanion-planting-chart","garden\u002Fcompanion-planting-chart","Companion Planting Chart","Good and bad neighbors for 30 vegetables, herbs and flowers.","i-lucide-sprout","garden",{"path":186,"stem":187,"title":188,"short":189,"icon":190,"hub":184},"\u002Fgarden\u002Fraised-bed-soil-calculator","garden\u002Fraised-bed-soil-calculator","Raised Bed Soil Calculator","Soil for any raised bed in cubic feet, cubic yards and bags.","i-lucide-shovel",{"path":192,"stem":193,"title":194,"short":195,"icon":196,"hub":184},"\u002Fgarden\u002Fsquare-foot-garden-planner","garden\u002Fsquare-foot-garden-planner","Square Foot Garden Planner","Plan a square foot garden square by square and count the plants.","i-lucide-layout-grid",{"path":198,"stem":199,"title":200,"short":201,"icon":202,"order":203,"calculators":204},"\u002Fpets","pets\u002Findex","Pet & Backyard Animal Calculators","Cat and dog ages in human years, and chicken coop space.","i-lucide-paw-print",8,[205,212,218],{"path":206,"stem":207,"title":208,"short":209,"icon":210,"hub":211},"\u002Fpets\u002Fcat-age-calculator","pets\u002Fcat-age-calculator","Cat Age Calculator","Cat years to human years, plus your cat's life stage.","i-lucide-cat","pets",{"path":213,"stem":214,"title":215,"short":216,"icon":217,"hub":211},"\u002Fpets\u002Fchicken-coop-size-calculator","pets\u002Fchicken-coop-size-calculator","Chicken Coop Size Calculator","Coop floor, run, roosts, nest boxes and vents for your flock.","i-lucide-egg",{"path":219,"stem":220,"title":221,"short":222,"icon":223,"hub":211},"\u002Fpets\u002Fdog-age-calculator","pets\u002Fdog-age-calculator","Dog Age Calculator","Dog years to human years by size, plus the epigenetic formula.","i-lucide-dog",{"kind":225,"calculator":226},"calculator",{"id":227,"title":208,"body":228,"calculator":608,"description":609,"extension":610,"faq":611,"hub":211,"icon":210,"keyword":627,"meta":628,"navigation":629,"path":206,"related":630,"seo":634,"seoTitle":635,"short":209,"stem":207,"updated":636,"__hash__":637},"calculators\u002Fpets\u002Fcat-age-calculator.md",{"type":229,"value":230,"toc":600},"minimark",[231,236,240,263,266,273,276,280,283,508,512,515,541,544,548,567,570,574],[232,233,235],"h2",{"id":234},"how-the-calculator-works","How the calculator works",[237,238,239],"p",{},"Cats grow up fast. By their first birthday most are nearly adult size, so a straight \"multiply by seven\" rule makes no sense for them. The calculator uses the human-age scale shown in the 2021 AAHA\u002FAAFP Feline Life Stage Guidelines, written by the American Animal Hospital Association and the American Association of Feline Practitioners:",[241,242,243,251,257],"ul",{},[244,245,246,250],"li",{},[247,248,249],"strong",{},"First year:"," about 15 human years.",[244,252,253,256],{},[247,254,255],{},"Second year:"," about 9 more, so a 2-year-old cat is about 24.",[244,258,259,262],{},[247,260,261],{},"Every year after that:"," about 4 more.",[237,264,265],{},"For kittens it uses the points that widely shared cat age charts print, about 10 human years at 6 months and 21 at 18 months, and draws a straight line between them, so a 3-month-old kitten comes out at about 5. Months count as a fraction of a year: a cat of 3 years 6 months is 24 + 1.5 × 4 = 30.",[237,267,268,269,272],{},"To go the other way, switch to ",[247,270,271],{},"Human age → cat years",". A 50-year-old person matches a cat of about 8 years 6 months.",[237,274,275],{},"These are conventions, not measurements. Cats age at different rates depending on genes, breed, weight, environment and health, so treat the number as a way to picture your cat's stage of life, not as a precise biological age.",[232,277,279],{"id":278},"cat-age-chart-cat-years-to-human-years","Cat age chart: cat years to human years",[237,281,282],{},"Human ages are rounded to the nearest year.",[284,285,286,302],"table",{},[287,288,289],"thead",{},[290,291,292,296,299],"tr",{},[293,294,295],"th",{},"Cat's age",[293,297,298],{},"Human age",[293,300,301],{},"Life stage",[303,304,305,317,327,337,347,357,367,378,388,398,408,419,429,439,449,458,468,478,488,498],"tbody",{},[290,306,307,311,314],{},[308,309,310],"td",{},"1",[308,312,313],{},"15",[308,315,316],{},"Young adult",[290,318,319,322,325],{},[308,320,321],{},"2",[308,323,324],{},"24",[308,326,316],{},[290,328,329,332,335],{},[308,330,331],{},"3",[308,333,334],{},"28",[308,336,316],{},[290,338,339,342,345],{},[308,340,341],{},"4",[308,343,344],{},"32",[308,346,316],{},[290,348,349,352,355],{},[308,350,351],{},"5",[308,353,354],{},"36",[308,356,316],{},[290,358,359,362,365],{},[308,360,361],{},"6",[308,363,364],{},"40",[308,366,316],{},[290,368,369,372,375],{},[308,370,371],{},"7",[308,373,374],{},"44",[308,376,377],{},"Mature adult",[290,379,380,383,386],{},[308,381,382],{},"8",[308,384,385],{},"48",[308,387,377],{},[290,389,390,393,396],{},[308,391,392],{},"9",[308,394,395],{},"52",[308,397,377],{},[290,399,400,403,406],{},[308,401,402],{},"10",[308,404,405],{},"56",[308,407,377],{},[290,409,410,413,416],{},[308,411,412],{},"11",[308,414,415],{},"60",[308,417,418],{},"Senior",[290,420,421,424,427],{},[308,422,423],{},"12",[308,425,426],{},"64",[308,428,418],{},[290,430,431,434,437],{},[308,432,433],{},"13",[308,435,436],{},"68",[308,438,418],{},[290,440,441,444,447],{},[308,442,443],{},"14",[308,445,446],{},"72",[308,448,418],{},[290,450,451,453,456],{},[308,452,313],{},[308,454,455],{},"76",[308,457,418],{},[290,459,460,463,466],{},[308,461,462],{},"16",[308,464,465],{},"80",[308,467,418],{},[290,469,470,473,476],{},[308,471,472],{},"17",[308,474,475],{},"84",[308,477,418],{},[290,479,480,483,486],{},[308,481,482],{},"18",[308,484,485],{},"88",[308,487,418],{},[290,489,490,493,496],{},[308,491,492],{},"19",[308,494,495],{},"92",[308,497,418],{},[290,499,500,503,506],{},[308,501,502],{},"20",[308,504,505],{},"96",[308,507,418],{},[232,509,511],{"id":510},"cat-life-stages","Cat life stages",[237,513,514],{},"The 2021 AAHA\u002FAAFP guidelines group cats into four life stages by age:",[241,516,517,523,529,535],{},[244,518,519,522],{},[247,520,521],{},"Kitten:"," birth to 1 year.",[244,524,525,528],{},[247,526,527],{},"Young adult:"," 1 to 6 years.",[244,530,531,534],{},[247,532,533],{},"Mature adult:"," 7 to 10 years.",[244,536,537,540],{},[247,538,539],{},"Senior:"," over 10 years.",[237,542,543],{},"The same guidelines add an end-of-life stage, which can come at any age. The stages exist to help your veterinarian decide what to check at each visit. A cat does not change overnight on its seventh or eleventh birthday. The calculator keeps a cat in the young adult stage until its 7th birthday and calls it a senior once it is past 10.",[232,545,547],{"id":546},"example-a-cat-of-4-years-8-months","Example: a cat of 4 years 8 months",[549,550,551,554,557,560],"ol",{},[244,552,553],{},"4 years 8 months is 4.67 years.",[244,555,556],{},"The first two years count as 24 human years.",[244,558,559],{},"The remaining 2.67 years × 4 = 10.7 human years.",[244,561,562,563,566],{},"24 + 10.7 = 34.7, so the cat is about ",[247,564,565],{},"35 in human years",".",[237,568,569],{},"That makes it a young adult. It moves into the mature adult stage at 7, when it will be about 44 in human years.",[232,571,573],{"id":572},"tips-for-using-cat-years","Tips for using cat years",[241,575,576,582,588,594],{},[244,577,578,581],{},[247,579,580],{},"Use it as a conversation starter, not a diagnosis."," Two 12-year-old cats can be in very different shape. Your veterinarian's exam tells you far more than any age chart.",[244,583,584,587],{},[247,585,586],{},"Watch for changes rather than birthdays."," A change in appetite, thirst, weight, grooming or litter box habits is worth a vet visit at any age, and especially in a mature or senior cat.",[244,589,590,593],{},[247,591,592],{},"Rescue cat with no birthday?"," Pick the middle of the age range your vet estimates and enter that. You can always adjust it later.",[244,595,596,599],{},[247,597,598],{},"Indoor and outdoor cats use the same chart."," Lifestyle affects health and lifespan, but the convention for converting ages does not change.",{"title":601,"searchDepth":43,"depth":43,"links":602},"",[603,604,605,606,607],{"id":234,"depth":43,"text":235},{"id":278,"depth":43,"text":279},{"id":510,"depth":43,"text":511},{"id":546,"depth":43,"text":547},{"id":572,"depth":43,"text":573},"CatAgeCalculator","Convert your cat's age to human years and see its life stage. Enter years and months, or go the other way and turn a human age into cat years.","md",[612,615,618,621,624],{"q":613,"a":614},"How old is my cat in human years?","A 1-year-old cat is roughly 15 in human years and a 2-year-old about 24. After that, add about 4 human years for every cat year, so a 5-year-old cat is about 36, a 10-year-old about 56 and a 15-year-old about 76.",{"q":616,"a":617},"Is one cat year equal to seven human years?","No. Cats grow up much faster than that at the start. A 1-year-old cat is close to adult size and can have kittens, which the times-seven rule would call a 7-year-old child. After the second birthday cats age more slowly, about 4 human years per year.",{"q":619,"a":620},"At what age is a cat considered a senior?","The 2021 AAHA\u002FAAFP Feline Life Stage Guidelines call cats over 10 years old seniors. Cats from 7 to 10 are mature adults. The stages help your veterinarian plan checkups and screening; they are not a sign that anything is wrong.",{"q":622,"a":623},"When does a kitten become an adult cat?","The AAHA\u002FAAFP guidelines treat cats as young adults from their first birthday. Most cats are close to full size by then, although some large breeds, such as Maine Coons, keep filling out for longer.",{"q":625,"a":626},"How can I tell how old my cat is if I don't know its birthday?","Ask your veterinarian. Teeth are the best clue in young cats, because kittens have all their adult teeth by about six months. In adults, tartar, tooth wear, eyes, coat and muscle tone give a rough range rather than an exact age.","cat age calculator",{},true,[631,632,633],"dog-age-calculator","chicken-coop-size-calculator","fish-tank-stocking-calculator",{"title":208,"description":609},"Cat Age Calculator – Cat Years to Human Years & Life Stage","2026-10-17","FcJH0fsUY-yOznJoQVe8gBDw9occ71pE1cpTkvQIbg4",1792193316443]