[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"tool-content:en:tile-calculator":3,"glossary:en":57,"published-tools-en":107},{"id":4,"documentId":5,"slug":6,"intro":7,"howTo":8,"longContent":9,"createdAt":10,"updatedAt":11,"publishedAt":12,"locale":13,"name":14,"faq":15,"examples":40,"category":41,"seo":51,"localizations":56,"metaTitle":53,"metaDescription":54},330,"gkmm00yn47xu544uzth11ovu","tile-calculator","\u003Cp>A tile calculator divides the surface area by the area of a single tile, then adds a \u003Cstrong>cut waste allowance\u003C\u002Fstrong> for the tiles trimmed against the walls. On a 10 by 10 foot floor laid in 12 inch tile that means \u003Cstrong>110 tiles\u003C\u002Fstrong> instead of 100. The headline figure reads \u003Cstrong>11 boxes\u003C\u002Fstrong>, since a tile shop sells by the box. The tiles needed and the total square footage sit underneath, next to the \u003Cstrong>spare tiles\u003C\u002Fstrong> left in the last box once the floor is down.\u003C\u002Fp>","\u003Col>\u003Cli>Pick imperial or metric units, then enter the length and width of the surface in feet or metres together with the size of one tile in inches or centimetres.\u003C\u002Fli>\u003Cli>Raise the number of surfaces above 1 for identical planes, so three shower walls of 3 by 7 feet go in once as 3 by 7 with a quantity of 3.\u003C\u002Fli>\u003Cli>Choose the tile pattern, because a straight lay adds 10% for cuts while a diagonal or herringbone layout adds 15%.\u003C\u002Fli>\u003Cli>Enter how many tiles come in a box to turn the tile count into boxes to buy, with the spare tiles left over shown underneath. Leave that field at 0 when the shop sells tiles singly and the headline switches back to a tile count.\u003C\u002Fli>\u003C\u002Fol>","\u003Ch2 id=\"how-many-tiles-for-a-10-by-10-room\">How many tiles do I need for a 10 by 10 room?\u003C\u002Fh2>\u003Cp>A room of 10 by 10 feet gives \u003Cstrong>100 square feet of floor\u003C\u002Fstrong> while a 12 by 12 inch tile covers one square foot, which puts the bare coverage at 100 tiles before a single cut. The standard 10% allowance takes the order to \u003Cstrong>110 tiles\u003C\u002Fstrong>, eleven boxes of ten with no spares left once the last row goes down. On the diagonal the same floor climbs to 115 tiles, so \u003Cstrong>12 boxes\u003C\u002Fstrong> and 5 tiles kept back for repairs.\u003C\u002Fp>\u003Ch2 id=\"how-to-calculate-square-footage-for-tile\">How to calculate square footage for tile\u003C\u002Fh2>\u003Cp>Square footage for a floor is the \u003Cstrong>length in feet times the width\u003C\u002Fstrong> in feet, while the area of one tile is its two sides in inches multiplied together then \u003Cstrong>divided by 144\u003C\u002Fstrong>, the number of square inches in a square foot. Dividing the room by the tile gives the raw count that a tile square footage calculator shows before the allowance goes on top.\u003C\u002Fp>\u003Cp>In metric the sum runs in square metres, with the tile area in centimetres divided by 10,000, so a 5 by 4 metre room in 60 by 60 cm tile comes to 20 square metres and 56 tiles of coverage.\u003C\u002Fp>\u003Cp>An L-shaped room comes out as two rectangles measured apart then added together. Thresholds in a doorway stay in the count instead of coming off it, the strip under a door still taking a cut piece. Grout joints do not come off the figure either, since a 12 inch tile actually measures a shade under 12 inches and the joint makes up the difference.\u003C\u002Fp>\u003Ch2 id=\"tiles-per-100-sq-ft-by-tile-size\">Tiles per 100 sq ft by tile size\u003C\u002Fh2>\u003Cp>The five formats below cover most residential work, from the 12 inch square used on bathroom floors to the 60 by 60 cm porcelain sold for open-plan rooms. Each row is what a tile sq ft calculator returns for a flat 100 square feet, first as bare coverage then with the \u003Cstrong>10% straight-lay allowance\u003C\u002Fstrong> on top.\u003C\u002Fp>\u003Ctable>\u003Cthead>\u003Ctr>\u003Cth>Tile size\u003C\u002Fth>\u003Cth>Area of one tile\u003C\u002Fth>\u003Cth>Tiles to cover 100 sq ft\u003C\u002Fth>\u003Cth>Tiles to buy at +10%\u003C\u002Fth>\u003C\u002Ftr>\u003C\u002Fthead>\u003Ctbody>\u003Ctr>\u003Ctd>12 x 12 in\u003C\u002Ftd>\u003Ctd>1.00 sq ft\u003C\u002Ftd>\u003Ctd>100\u003C\u002Ftd>\u003Ctd>110\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>12 x 24 in\u003C\u002Ftd>\u003Ctd>2.00 sq ft\u003C\u002Ftd>\u003Ctd>50\u003C\u002Ftd>\u003Ctd>55\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>18 x 18 in\u003C\u002Ftd>\u003Ctd>2.25 sq ft\u003C\u002Ftd>\u003Ctd>45\u003C\u002Ftd>\u003Ctd>49\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>24 x 24 in\u003C\u002Ftd>\u003Ctd>4.00 sq ft\u003C\u002Ftd>\u003Ctd>25\u003C\u002Ftd>\u003Ctd>28\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>60 x 60 cm\u003C\u002Ftd>\u003Ctd>3.88 sq ft\u003C\u002Ftd>\u003Ctd>26\u003C\u002Ftd>\u003Ctd>29\u003C\u002Ftd>\u003C\u002Ftr>\u003C\u002Ftbody>\u003C\u002Ftable>\u003Cp>A large format looks cheaper in the count while costing more per mistake, one cracked 24 inch tile writing off \u003Cstrong>four square feet\u003C\u002Fstrong> of material against one for the small square.\u003C\u002Fp>\u003Ch2 id=\"how-much-extra-tile-should-i-buy-for-cuts\">How much extra tile should I buy for cuts?\u003C\u002Fh2>\u003Cp>\u003Cstrong>A straight lay needs 10% extra and a diagonal or herringbone 15%.\u003C\u002Fstrong> The straight version only loses material around the perimeter of the room, where whole tiles meet the wall and come back trimmed, which is the margin fitters and manufacturers both land on. Diagonal and herringbone layouts finish each row on a \u003Cstrong>mitre cut\u003C\u002Fstrong>, a 45 degree offcut that rarely fits anywhere else on the floor.\u003C\u002Fp>\u003Cp>The result keeps those extra tiles on a line of their own: on the 10 by 10 floor, \u003Cstrong>10 tiles out of the 110\u003C\u002Fstrong> exist only to be cut up. An out-of-square room or a floor with several pipe cutouts earns another five points on top, which takes a 48 square foot bathroom from 53 tiles to \u003Cstrong>56\u003C\u002Fstrong>.\u003C\u002Fp>\u003Ch2 id=\"how-to-calculate-tile-for-a-shower\">How to calculate tile for a shower\u003C\u002Fh2>\u003Cp>Three walls of a 3 foot enclosure tiled 7 feet up go in once as 3 by 7 with the number of surfaces set to 3, which totals \u003Cstrong>63 square feet\u003C\u002Fstrong>. In 12 by 24 inch tile that comes to 32 tiles of coverage, \u003Cstrong>35 tiles\u003C\u002Fstrong> once the 10% margin is on and \u003Cstrong>5 boxes of eight\u003C\u002Fstrong>, leaving 5 spares.\u003C\u002Fp>\u003Cp>Walls of unequal width go in one at a time so that each one rounds up on its own, which is what separates a shower tile calculator from a single floor sum. A niche adds surface instead of removing it, its back and sides getting tiled too.\u003C\u002Fp>\u003Ch2 id=\"how-many-spare-tiles-should-i-keep\">How many spare tiles should I keep?\u003C\u002Fh2>\u003Cp>\u003Cstrong>One full box.\u003C\u002Fstrong> The tiles left in the last opened box are the repair stock for the next ten years of the floor. Ceramic and porcelain take their colour in a \u003Cstrong>dye lot\u003C\u002Fstrong>, the production batch a tile was fired in. Shade drifts enough between lots that a tile bought two years later reads as a patch under raking light.\u003C\u002Fp>\u003Cp>A count that lands on \u003Cstrong>0 spares\u003C\u002Fstrong>, as the 110 tile floor does, is worth one more box at the counter, since ranges get discontinued inside a couple of years and a lost dye lot turns one cracked tile into a relaid floor.\u003C\u002Fp>","2026-08-04T07:29:52.906Z","2026-08-21T10:00:02.541Z","2026-08-21T10:00:00.000Z","en","Tile Calculator",[16,20,24,28,32,36],{"id":17,"question":18,"answer":19},2330,"How many 12x12 tiles do I need for 100 square feet?","\u003Cp>A 12 by 12 inch tile covers one square foot, so 100 square feet takes \u003Cstrong>100 tiles\u003C\u002Fstrong> of pure coverage and \u003Cstrong>110 tiles\u003C\u002Fstrong> once the 10% straight-lay allowance goes on. Box size decides the rest of the order, ten to a box giving \u003Cstrong>11 boxes\u003C\u002Fstrong> with nothing spare while boxes of twelve come out at 10 boxes and 10 tiles held back for repairs. A diagonal or herringbone layout takes 15%, so 115 tiles and 12 boxes of ten.\u003C\u002Fp>",{"id":21,"question":22,"answer":23},2332,"How much extra tile should I buy for waste?","\u003Cp>Ten percent on a straight grid layout and fifteen percent on a diagonal or herringbone pattern. A 6 by 8 foot bathroom floor of 48 square feet laid straight in 12 inch tile needs 48 tiles of coverage, \u003Cstrong>53 tiles\u003C\u002Fstrong> to buy and \u003Cstrong>6 boxes of ten\u003C\u002Fstrong>, which leaves 7 spares. Move to the 15% setting when the room runs visibly out of square or the floor carries several pipe cutouts, which takes the same bathroom to \u003Cstrong>56 tiles\u003C\u002Fstrong>.\u003C\u002Fp>",{"id":25,"question":26,"answer":27},2334,"How do I calculate tile for a shower?","\u003Cp>Measure each wall plane and run them as surfaces of one job. Three identical walls 3 feet wide by 7 feet high go in as 3 by 7 with the number of surfaces set to 3, which totals \u003Cstrong>63 square feet\u003C\u002Fstrong> and \u003Cstrong>35 tiles\u003C\u002Fstrong> of 12 by 24 inch. Tiling those walls to an 8 foot ceiling instead lifts the surface to 72 square feet and the order to \u003Cstrong>40 tiles\u003C\u002Fstrong>, five boxes of eight. Nothing comes off for the door opening. The pan is worked out on its own because mosaic sells by the sheet.\u003C\u002Fp>",{"id":29,"question":30,"answer":31},2336,"How many tiles are in a box?","\u003Cp>Tile shops sell a box by its coverage, usually somewhere between 10 and 16 square feet, so the tile count drops as the format grows. A 12 by 12 inch tile comes 10 to 12 to a box, a 12 by 24 inch tile 8 to a box and a 24 by 24 inch tile 3 or 4. The label prints the exact figure under the coverage. Enter \u003Cstrong>0 in the tiles per box field\u003C\u002Fstrong> when the shop sells tiles singly and the headline switches back to a plain tile count.\u003C\u002Fp>",{"id":33,"question":34,"answer":35},2337,"Do I subtract the bath, the vanity or the toilet from the floor area?","\u003Cp>Take off only what sits on the subfloor and never gets tiled under, meaning a fitted bath or a run of built-in units. A 5 by 2.5 foot bath covers 12.5 square feet of a 6 by 8 foot bathroom, dropping the tiled floor from 48 to 35.5 square feet and the order from 53 tiles to \u003Cstrong>40 tiles\u003C\u002Fstrong>, four boxes of ten instead of six. The toilet stays in the figure because tiles run up to the pan on three sides and each of those pieces comes out of a whole tile.\u003C\u002Fp>",{"id":37,"question":38,"answer":39},2338,"What should I do with the leftover tiles from the last box?","\u003Cp>Store them flat, dry and away from frost, since a tile bought later comes from a different \u003Cstrong>dye lot\u003C\u002Fstrong> and reads as a slightly different shade next to the original run. The spare count under the box figure shows how much repair stock the order already carries, so a floor landing on \u003Cstrong>0 spares\u003C\u002Fstrong> deserves one more box. Keeping \u003Cstrong>a full box of ten\u003C\u002Fstrong> back is the usual trade habit, enough for the cracked tile under a dropped pan.\u003C\u002Fp>",[],{"id":42,"documentId":43,"uid":44,"name":45,"tagline":46,"hubContent":47,"createdAt":48,"updatedAt":49,"publishedAt":50,"locale":13},27,"eb3vn4x2yjfb8rgjdmtb7r9e","home","Home & DIY","Materials, areas and layouts for home projects","\u003Cp>The calculators in this category answer the question that decides the order, which is how much material to buy. Concrete, gravel, mulch, tile, paint and lumber are each sold in their own unit, by the ton, the cubic yard, the box or the bag, so a raw volume rarely maps onto what a supplier will actually deliver. Every tool here turns a measurement into a purchase, adds the waste allowance the trade expects and flags the depths and dimensions that make a job fail.\u003C\u002Fp>","2026-08-04T07:29:26.689Z","2026-08-06T10:00:01.352Z","2026-08-06T10:00:00.000Z",{"id":52,"metaTitle":53,"metaDescription":54,"keywords":55,"metaRobots":55,"structuredData":55,"metaViewport":55,"canonicalURL":55},560,"Tile Calculator: Room Size to Tiles, Boxes and Cut Waste","This tile calculator turns a room and tile size into tiles, boxes and spare tiles, with a 10% cut allowance for a straight lay or 15% for herringbone.",null,[],[58,70,82,95],{"id":59,"documentId":60,"slug":61,"term":62,"definition":63,"relatedTools":64,"createdAt":67,"updatedAt":68,"publishedAt":69,"locale":13},17,"o1ljpluv6app6z9rrhst4gfn","cubic-yard","Cubic yard","\u003Cp>A \u003Cstrong>cubic yard\u003C\u002Fstrong> is the volume of a cube measuring 3 x 3 x 3 feet, which equals 27 cubic feet or about \u003Cstrong>0.7646 m³\u003C\u002Fstrong>. It is the standard unit for ordering bulk materials in the United States: ready-mix concrete, topsoil, gravel, sand and mulch are all priced and delivered by the cubic yard, often shortened to \"yard\" on a quote.\u003C\u002Fp>\u003Cp>For scale, a typical 12 x 10 ft patio slab poured 4 inches thick contains 40 cubic feet, which is 40 \u002F 27 = 1.48 cubic yards of concrete. A standard ready-mix truck carries 8 to 10 cubic yards, so that whole slab uses less than a fifth of one load.\u003C\u002Fp>\u003Cp>How big is a cubic yard in practice? The cube stands 3 feet on each side, roughly counter height, and holds about 14 full wheelbarrow loads of material. Spread out, one cubic yard covers close to 100 square feet at a depth of 3 inches, the usual layer for mulch or a gravel path.\u003C\u002Fp>",[65,66],"math\u002Fconcrete-calculator","math\u002Fvolume-calculator","2026-07-18T14:23:56.812Z","2026-08-02T10:00:01.228Z","2026-08-02T10:00:00.000Z",{"id":71,"documentId":72,"slug":73,"term":74,"definition":75,"relatedTools":76,"createdAt":79,"updatedAt":80,"publishedAt":81,"locale":13},16,"mdw0ypy9f3z1nioxaxnl9rvr","password-entropy","Entropy (passwords)","\u003Cp>\u003Cstrong>Entropy\u003C\u002Fstrong> measures how unpredictable a password is, expressed in bits. Each additional bit doubles the number of guesses an attacker needs. For a randomly generated password, it follows a simple formula: entropy = length × log2 of the alphabet size, so both the length and the variety of characters raise the score.\u003C\u002Fp>\u003Cp>A random 16-character password drawn from the 94 printable ASCII symbols reaches 16 × log2(94), about \u003Cstrong>105 bits\u003C\u002Fstrong>. At 10 billion guesses per second, exhausting that space would take on the order of 10^14 years, while a 6-character password from the same alphabet peaks at 39 bits and falls in about a minute.\u003C\u002Fp>\u003Cp>Written as a formula, \u003Cstrong>E = L × log2(N)\u003C\u002Fstrong>: the entropy equals the length L multiplied by the base-2 logarithm of N, the number of possible symbols per character. Current guidance treats 75 to 80 bits as the comfortable minimum for accounts that matter, a level a random 12-character password mixing all character types already clears.\u003C\u002Fp>",[77,78],"generator\u002Fpassword-generator","generator\u002Fusername-generator","2026-07-18T14:23:55.755Z","2026-08-01T10:00:01.360Z","2026-08-01T10:00:00.000Z",{"id":83,"documentId":84,"slug":85,"term":86,"definition":87,"relatedTools":88,"createdAt":92,"updatedAt":93,"publishedAt":94,"locale":13},15,"ypkfs6wnfljm03ge2b1ztiwv","percentage-point","Percentage point","\u003Cp>A \u003Cstrong>percentage point\u003C\u002Fstrong> is the unit used to express the arithmetic difference between two percentages. It compares rates by subtraction, while \"percent\" compares them by division: the two measures answer different questions and can differ wildly for the same change.\u003C\u002Fp>\u003Cp>Example: an interest rate that moves from 5% to 7% rises by \u003Cstrong>2 percentage points\u003C\u002Fstrong> (7 - 5 = 2), but by 40 percent in relative terms (2 ÷ 5 × 100 = 40). Saying \"the rate went up 2%\" would be wrong on both counts: the correct phrasings are \"up 2 points\" or \"up 40%\".\u003C\u002Fp>\u003Cp>The standard abbreviation is \u003Cstrong>pp\u003C\u002Fstrong>, sometimes just \"points\", as in \"unemployment fell by 0.5 pp\". Confusing percent with percentage points remains the classic trap: a party moving from 20% to 30% in the polls gains 10 percentage points, yet grows by 50 percent, and headlines regularly pick the wrong figure.\u003C\u002Fp>",[89,90,91],"math\u002Fpercentage-calculator","math\u002Faverage-calculator","finance\u002Fcalcul-remise","2026-07-18T14:23:54.573Z","2026-07-31T10:00:01.940Z","2026-07-31T10:00:00.000Z",{"id":96,"documentId":97,"slug":98,"term":99,"definition":100,"relatedTools":101,"createdAt":104,"updatedAt":105,"publishedAt":106,"locale":13},14,"g3okb797ekrz0kkpm36mfjwc","weighted-average","Weighted average","\u003Cp>A \u003Cstrong>weighted average\u003C\u002Fstrong> is an average where each value counts in proportion to an assigned importance, called its weight, instead of counting equally. Each value is multiplied by its weight, the products are added, and the sum is divided by the total of the weights. Class grades, GPAs, and stock indexes are all weighted averages.\u003C\u002Fp>\u003Cp>Example: scores of 92, 85, and 88 with weights of 30, 30, and 40 give (92 x 30 + 85 x 30 + 88 x 40) \u002F 100 = \u003Cstrong>88.3\u003C\u002Fstrong>. The plain average of the same scores is 88.33, but if the heaviest score dropped to 78, the weighted average would fall to 84.3 while the plain average only fell to 85.\u003C\u002Fp>\u003Cp>The weighted average formula in plain words: multiply each value by its weight, add up the products, then divide by the sum of the weights. In a spreadsheet the whole calculation fits in one cell, since Excel's SUMPRODUCT function multiplies and adds in a single pass: SUMPRODUCT of the values and weights, divided by SUM of the weights.\u003C\u002Fp>",[90,102,103],"math\u002Fgrade-calculator","math\u002Fgpa-calculator","2026-07-18T14:23:53.329Z","2026-07-30T10:00:01.216Z","2026-07-30T10:00:00.000Z",{"slugs":108},[109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,6,155,156,157,158,159,160,161,162,163],"age-calculator","average-calculator","cd-calculator","concrete-calculator","cursive-font-generator","date-calculator","fantasy-name-generator","final-grade-calculator","fraction-calculator","glitch-text-generator","gpa-calculator","grade-calculator","hex-converter","hours-calculator","interest-calculator","military-time-converter","roman-numeral-converter","password-generator","binary-converter","celsius-to-fahrenheit-converter","kg-to-lbs-converter","percentage-calculator","word-counter","tip-calculator","morse-code-translator","username-generator","ratio-calculator","sales-tax-calculator","small-text-generator","mm-to-inches-converter","volume-calculator","timer","square-footage-calculator","stair-calculator","roof-pitch-calculator","board-foot-calculator","aspect-ratio-calculator","rounding-calculator","random-letter-generator","mulch-calculator","fence-calculator","upside-down-text-generator","acreage-calculator","gravel-calculator","proportion-calculator","paint-calculator","braille-translator","quadratic-formula-calculator","gcf-calculator","probability-calculator","hex-to-rgb-converter","uuid-generator","standard-deviation-calculator","lcm-calculator","caesar-cipher"]