[{"data":1,"prerenderedAt":864},["ShallowReactive",2],{"catalog":3,"page:\u002Fpool-and-aquarium\u002Ffish-tank-stocking-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":161,"body":228,"calculator":831,"description":832,"extension":833,"faq":834,"hub":157,"icon":163,"keyword":853,"meta":854,"navigation":855,"path":159,"related":856,"seo":860,"seoTitle":861,"short":162,"stem":160,"updated":862,"__hash__":863},"calculators\u002Fpool-and-aquarium\u002Ffish-tank-stocking-calculator.md",{"type":229,"value":230,"toc":822},"minimark",[231,236,245,261,264,268,271,275,278,439,443,446,759,763,766,789,792,796],[232,233,235],"h2",{"id":234},"how-the-calculator-works","How the calculator works",[237,238,239,240,244],"p",{},"Add up the ",[241,242,243],"strong",{},"adult"," length of every fish (length × count), then compare the total with two rules of thumb:",[246,247,248,255],"ul",{},[249,250,251,254],"li",{},[241,252,253],{},"Inch-per-gallon rule:"," 1 inch of adult fish per US gallon. The calculator uses the gallons you enter, or works them out from the dimensions (length × width × height ÷ 231).",[249,256,257,260],{},[241,258,259],{},"Surface-area rule:"," 1 inch of adult fish per 12 square inches of water surface for tropical tanks, and per 30 square inches for coldwater tanks. The surface is length × width, so this rule needs the dimensions.",[237,262,263],{},"Each rule is shown as a percentage of what it allows. Both are rough, and both ignore what actually decides whether a tank works: how much waste each species produces, body shape, behavior, schooling needs, territory and filtration. Use them to catch an obviously crowded plan, then research each species.",[232,265,267],{"id":266},"why-the-two-rules-disagree","Why the two rules disagree",[237,269,270],{},"The gallon rule rewards height; the surface rule rewards floor area. A 20 high and a 20 long hold about the same water, but the long tank has 360 square inches of surface against 288, so the surface rule lets it carry 30 inches of fish against 24. Tall tanks look roomy in gallons and score worse on surface. Long tanks are the better buy for most community fish.",[232,272,274],{"id":273},"how-many-inches-of-fish-each-tank-allows","How many inches of fish each tank allows",[237,276,277],{},"Computed from the usual outside dimensions of standard US tanks, so treat the numbers as upper limits.",[279,280,281,303],"table",{},[282,283,284],"thead",{},[285,286,287,291,294,297,300],"tr",{},[288,289,290],"th",{},"Tank (length × width)",[288,292,293],{},"Surface",[288,295,296],{},"Inch-per-gallon rule",[288,298,299],{},"Surface rule, tropical",[288,301,302],{},"Surface rule, coldwater",[304,305,306,324,340,357,371,388,405,422],"tbody",{},[285,307,308,312,315,318,321],{},[309,310,311],"td",{},"10 gallon (20 × 10 in)",[309,313,314],{},"200 sq in",[309,316,317],{},"10 in",[309,319,320],{},"17 in",[309,322,323],{},"7 in",[285,325,326,329,332,335,338],{},[309,327,328],{},"20 high (24 × 12 in)",[309,330,331],{},"288 sq in",[309,333,334],{},"20 in",[309,336,337],{},"24 in",[309,339,317],{},[285,341,342,345,348,351,354],{},[309,343,344],{},"20 long (30 × 12 in)",[309,346,347],{},"360 sq in",[309,349,350],{},"19 in",[309,352,353],{},"30 in",[309,355,356],{},"12 in",[285,358,359,362,364,367,369],{},[309,360,361],{},"29 gallon (30 × 12 in)",[309,363,347],{},[309,365,366],{},"28 in",[309,368,353],{},[309,370,356],{},[285,372,373,376,379,382,385],{},[309,374,375],{},"40 breeder (36 × 18 in)",[309,377,378],{},"648 sq in",[309,380,381],{},"45 in",[309,383,384],{},"54 in",[309,386,387],{},"22 in",[285,389,390,393,396,399,402],{},[309,391,392],{},"55 gallon (48 × 13 in)",[309,394,395],{},"624 sq in",[309,397,398],{},"57 in",[309,400,401],{},"52 in",[309,403,404],{},"21 in",[285,406,407,410,413,416,419],{},[309,408,409],{},"75 gallon (48 × 18 in)",[309,411,412],{},"864 sq in",[309,414,415],{},"79 in",[309,417,418],{},"72 in",[309,420,421],{},"29 in",[285,423,424,427,430,433,436],{},[309,425,426],{},"125 gallon (72 × 18 in)",[309,428,429],{},"1,296 sq in",[309,431,432],{},"118 in",[309,434,435],{},"108 in",[309,437,438],{},"43 in",[232,440,442],{"id":441},"adult-sizes-of-common-aquarium-fish","Adult sizes of common aquarium fish",[237,444,445],{},"These are the commonly cited adult lengths, and the calculator's species list uses them. Individual fish vary, and fish kept well can reach the top of their range.",[279,447,448,464],{},[282,449,450],{},[285,451,452,455,458,461],{},[288,453,454],{},"Fish",[288,456,457],{},"Adult length",[288,459,460],{},"Metric",[288,462,463],{},"Notes",[304,465,466,480,494,507,519,533,544,555,566,578,590,602,614,626,640,652,663,677,691,705,719,733,747],{},[285,467,468,471,474,477],{},[309,469,470],{},"Ember tetra",[309,472,473],{},"0.8 in",[309,475,476],{},"2 cm",[309,478,479],{},"Schooling; keep 6 or more",[285,481,482,485,488,491],{},[309,483,484],{},"Celestial pearl danio",[309,486,487],{},"1 in",[309,489,490],{},"2.5 cm",[309,492,493],{},"Shy; keep 6 or more",[285,495,496,499,502,505],{},[309,497,498],{},"Neon tetra",[309,500,501],{},"1.5 in",[309,503,504],{},"3.8 cm",[309,506,479],{},[285,508,509,512,514,516],{},[309,510,511],{},"White Cloud Mountain minnow",[309,513,501],{},[309,515,504],{},[309,517,518],{},"Cool water; keep 6 or more",[285,520,521,524,527,530],{},[309,522,523],{},"Otocinclus",[309,525,526],{},"2 in",[309,528,529],{},"5.1 cm",[309,531,532],{},"Algae grazer; keep in a group",[285,534,535,538,540,542],{},[309,536,537],{},"Cardinal tetra",[309,539,526],{},[309,541,529],{},[309,543,479],{},[285,545,546,549,551,553],{},[309,547,548],{},"Rummy-nose tetra",[309,550,526],{},[309,552,529],{},[309,554,479],{},[285,556,557,560,562,564],{},[309,558,559],{},"Harlequin rasbora",[309,561,526],{},[309,563,529],{},[309,565,479],{},[285,567,568,571,573,575],{},[309,569,570],{},"Zebra danio",[309,572,526],{},[309,574,529],{},[309,576,577],{},"Very active; keep 6 or more",[285,579,580,583,585,587],{},[309,581,582],{},"Cherry barb",[309,584,526],{},[309,586,529],{},[309,588,589],{},"Peaceful barb; keep in a group",[285,591,592,595,597,599],{},[309,593,594],{},"Guppy",[309,596,526],{},[309,598,529],{},[309,600,601],{},"Females larger than males",[285,603,604,607,609,611],{},[309,605,606],{},"Honey gourami",[309,608,526],{},[309,610,529],{},[309,612,613],{},"Peaceful",[285,615,616,619,621,623],{},[309,617,618],{},"Panda corydoras",[309,620,526],{},[309,622,529],{},[309,624,625],{},"Bottom schooler; keep 6 or more",[285,627,628,631,634,637],{},[309,629,630],{},"Platy",[309,632,633],{},"2.5 in",[309,635,636],{},"6.3 cm",[309,638,639],{},"Livebearer; breeds readily",[285,641,642,645,647,649],{},[309,643,644],{},"Betta (male)",[309,646,633],{},[309,648,636],{},[309,650,651],{},"One male per tank",[285,653,654,657,659,661],{},[309,655,656],{},"Bronze corydoras",[309,658,633],{},[309,660,636],{},[309,662,625],{},[285,664,665,668,671,674],{},[309,666,667],{},"Tiger barb",[309,669,670],{},"3 in",[309,672,673],{},"7.6 cm",[309,675,676],{},"Fin nipper; keep 6 or more",[285,678,679,682,685,688],{},[309,680,681],{},"Dwarf gourami",[309,683,684],{},"3.5 in",[309,686,687],{},"8.9 cm",[309,689,690],{},"Males can be territorial",[285,692,693,696,699,702],{},[309,694,695],{},"Kuhli loach",[309,697,698],{},"4 in",[309,700,701],{},"10.2 cm",[309,703,704],{},"Slender burrower; keep in a group",[285,706,707,710,713,716],{},[309,708,709],{},"Pearl gourami",[309,711,712],{},"4.5 in",[309,714,715],{},"11.4 cm",[309,717,718],{},"Peaceful; needs a larger tank",[285,720,721,724,727,730],{},[309,722,723],{},"Bristlenose pleco",[309,725,726],{},"5 in",[309,728,729],{},"12.7 cm",[309,731,732],{},"Heavy waste for its size",[285,734,735,738,741,744],{},[309,736,737],{},"Angelfish",[309,739,740],{},"6 in",[309,742,743],{},"15.2 cm",[309,745,746],{},"Tall body; eats very small fish",[285,748,749,752,754,756],{},[309,750,751],{},"Fancy goldfish",[309,753,740],{},[309,755,743],{},[309,757,758],{},"Coldwater; bulky, heavy waste; 6–8 in",[232,760,762],{"id":761},"example-a-29-gallon-community-tank","Example: a 29-gallon community tank",[237,764,765],{},"The tank is 30 × 12 × 18 inches and tropical. The plan is ten neon tetras, six panda corydoras and one honey gourami.",[767,768,769,776,783],"ol",{},[249,770,771,772,775],{},"Adult inches: 10 × 1.5 + 6 × 2 + 1 × 2 = ",[241,773,774],{},"29 inches"," of fish.",[249,777,778,779,782],{},"Gallons: 30 × 12 × 18 ÷ 231 = 28.05, so the inch-per-gallon rule allows 28 inches: ",[241,780,781],{},"103 percent",".",[249,784,785,786,782],{},"Surface: 30 × 12 = 360 square inches ÷ 12 = 30 inches allowed: ",[241,787,788],{},"97 percent",[237,790,791],{},"That tank is full by both rules. Adding a pair of angelfish would take it to 41 inches, 146 and 137 percent, and angelfish are known to eat neon tetras anyway.",[232,793,795],{"id":794},"tips","Tips",[246,797,798,804,810,816],{},[249,799,800,803],{},[241,801,802],{},"Plan for adult size."," Fish in the store are often a fraction of their adult length.",[249,805,806,809],{},[241,807,808],{},"Respect schooling numbers."," Six small schooling fish is a better plan than two of each of three species.",[249,811,812,815],{},[241,813,814],{},"Stock slowly."," Add a few fish at a time to a cycled tank so the filter bacteria can catch up.",[249,817,818,821],{},[241,819,820],{},"Count your real water."," Substrate and rock take up space; use the aquarium volume calculator for the corrected gallons.",{"title":823,"searchDepth":43,"depth":43,"links":824},"",[825,826,827,828,829,830],{"id":234,"depth":43,"text":235},{"id":266,"depth":43,"text":267},{"id":273,"depth":43,"text":274},{"id":441,"depth":43,"text":442},{"id":761,"depth":43,"text":762},{"id":794,"depth":43,"text":795},"FishTankStockingCalculator","Check how many fish your aquarium can hold. Add each species and count, then compare against the inch-per-gallon and surface-area rules of thumb.","md",[835,838,841,844,847,850],{"q":836,"a":837},"How many fish can I put in a 10-gallon tank?","The inch-per-gallon rule allows about 10 inches of adult fish, and the surface-area rule allows about 17 inches for a 20 × 10 inch tank. Six neon tetras (9 inches) come to 87 and 54 percent. Stick to small, peaceful species, and check adult sizes, since many fish are sold as juveniles.",{"q":839,"a":840},"What is the one inch per gallon rule?","One inch of adult fish per US gallon of water. It only works for small, slim fish. Body mass grows much faster than length, so one 6-inch goldfish produces far more waste than four 1.5-inch tetras with the same total length.",{"q":842,"a":843},"What is the surface-area rule for fish tanks?","About 1 inch of adult fish per 12 square inches of water surface for tropical fish, and 1 inch per 30 square inches for coldwater fish such as goldfish. Oxygen enters the water at the surface, so a long, shallow tank scores better than a tall one with the same gallons.",{"q":845,"a":846},"How many neon tetras can go in a 20-gallon tank?","In a 20 long, twelve neon tetras (18 inches of fish) use 96 percent of the inch-per-gallon rule and 60 percent of the surface-area rule. A school of that size fits, but the gallon rule leaves no room for other fish, so the surface-area figure is the one to plan around.",{"q":848,"a":849},"How many goldfish can I keep in a 29-gallon tank?","By the coldwater surface-area rule, a 30 × 12 inch tank allows about 12 inches of fish, which two fancy goldfish at 6 inches already fill. Many keepers give goldfish more room than that, and common and comet goldfish grow too big for most aquariums.",{"q":851,"a":852},"Does the calculator account for my filter?","No. Neither rule of thumb knows about filtration, plants, water-change schedule or how messy each species is. A strong filter and frequent water changes help with waste, but they do not give fish more swimming room.","fish tank stocking calculator",{},true,[857,858,859],"aquarium-volume-calculator","pool-volume-calculator","chicken-coop-size-calculator",{"title":161,"description":832},"Fish Tank Stocking Calculator – How Many Fish Fit?","2026-10-17","WUmGGnldZdlFQYfTSFSnELxgSbg8frtSuWT7E5YppbI",1792193315600]