[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"tool-content:en:gravel-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},324,"clenplr4lcgjivcc6wmgavv3","gravel-calculator","\u003Cp>A cubic yard of gravel weighs between 1.3 and 1.5 short tons, so this \u003Cstrong>gravel calculator\u003C\u002Fstrong> answers in tons first with cubic yards, cubic feet and cubic meters underneath for checking a quote. Take a 20 by 10 ft driveway at 4 in: crushed stone #57 comes to \u003Cstrong>3.33 tons\u003C\u002Fstrong> where pea gravel reaches 3.46, nearly 250 lb apart on the same 200 sq ft. The headline tonnage adds a \u003Cstrong>10% waste allowance\u003C\u002Fstrong> for settling and spillage before rounding up to the next half ton most bulk yards deliver.\u003C\u002Fp>","\u003Col>\u003Cli>Select what the gravel is for. The depth check reads that choice and compares the entry against 4 to 6 in for a driveway, 2 to 3 in for a walkway or patio and 6 to 12 in for a French drain.\u003C\u002Fli>\u003Cli>Set the gravel type, since crushed stone #57 counts 1.35 short tons per cubic yard against 1.5 for decomposed granite. A 10 cubic yard job swings by a ton and a half between those two.\u003C\u002Fli>\u003Cli>Switch to imperial or metric, then enter length, width and depth. Imperial takes feet with the depth in inches while metric takes meters with the depth in centimeters.\u003C\u002Fli>\u003Cli>Read the tons to order in the green panel at the top, waste allowance already included, then check the cubic yards line under it against the figure the yard quoted.\u003C\u002Fli>\u003C\u002Fol>","\u003Ch2 id=\"gravel-driveway\">How much gravel do I need for a gravel driveway?\u003C\u002Fh2>\u003Cp>A driveway 20 ft long by 10 ft wide covered \u003Cstrong>4 in deep\u003C\u002Fstrong> in crushed stone #57 holds 66.7 cubic feet of stone, which works out at \u003Cstrong>2.47 cubic yards\u003C\u002Fstrong> and 3.33 short tons. The 10% margin pushes that to \u003Cstrong>4 tons to order\u003C\u002Fstrong> in the gravel driveway calculator, because turning up half a ton short means a second delivery fee for what fits in two wheelbarrows. That #57 grade is the washed 3\u002F4 in stone most yards keep for driveways and drainage trenches.\u003C\u002Fp>\u003Cp>Depth moves that figure faster than any other entry on the form. The recommended bed runs \u003Cstrong>4 to 6 in\u003C\u002Fstrong> under a car against 2 to 3 in on a walkway, so the same 20 by 10 ft strip laid at the top of the driveway range needs \u003Cstrong>5.5 tons\u003C\u002Fstrong> rather than 4, an extra 1.2 cubic yards for two inches nobody sees once the surface is raked. The depth field turns amber as soon as an entry falls outside that range, whichever side it lands on.\u003C\u002Fp>\u003Ch2 id=\"one-ton-coverage\">How much will 1 ton of gravel cover?\u003C\u002Fh2>\u003Cp>One short ton of crushed stone #57 fills \u003Cstrong>0.74 cubic yards\u003C\u002Fstrong> of loose material, close to 20 cubic feet, which spreads over \u003Cstrong>120 sq ft at 2 in\u003C\u002Fstrong>, 80 sq ft at 3 in and 60 sq ft at 4 in. Lighter stone covers more ground per ton, so river rock reaches \u003Cstrong>125 sq ft\u003C\u002Fstrong> at 2 in while decomposed granite stops at 108, held back by its fines, the crusher dust that packs into the voids between the chips instead of leaving them empty.\u003C\u002Fp>\u003Ctable>\u003Cthead>\u003Ctr>\u003Cth>Gravel type\u003C\u002Fth>\u003Cth>Bulk density\u003C\u002Fth>\u003Cth>1 ton at 2 in\u003C\u002Fth>\u003Cth>1 ton at 3 in\u003C\u002Fth>\u003Cth>1 ton at 4 in\u003C\u002Fth>\u003C\u002Ftr>\u003C\u002Fthead>\u003Ctbody>\u003Ctr>\u003Ctd>Pea gravel\u003C\u002Ftd>\u003Ctd>1.4 tons\u002Fyd³\u003C\u002Ftd>\u003Ctd>116 sq ft\u003C\u002Ftd>\u003Ctd>77 sq ft\u003C\u002Ftd>\u003Ctd>58 sq ft\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Crushed stone #57\u003C\u002Ftd>\u003Ctd>1.35 tons\u002Fyd³\u003C\u002Ftd>\u003Ctd>120 sq ft\u003C\u002Ftd>\u003Ctd>80 sq ft\u003C\u002Ftd>\u003Ctd>60 sq ft\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>River rock\u003C\u002Ftd>\u003Ctd>1.3 tons\u002Fyd³\u003C\u002Ftd>\u003Ctd>125 sq ft\u003C\u002Ftd>\u003Ctd>83 sq ft\u003C\u002Ftd>\u003Ctd>62 sq ft\u003C\u002Ftd>\u003C\u002Ftr>\u003Ctr>\u003Ctd>Decomposed granite\u003C\u002Ftd>\u003Ctd>1.5 tons\u002Fyd³\u003C\u002Ftd>\u003Ctd>108 sq ft\u003C\u002Ftd>\u003Ctd>72 sq ft\u003C\u002Ftd>\u003Ctd>54 sq ft\u003C\u002Ftd>\u003C\u002Ftr>\u003C\u002Ftbody>\u003C\u002Ftable>\u003Cp>Those coverage figures assume dry stone delivered loose in bulk. Quarry moisture and compaction move bulk density by up to \u003Cstrong>10% either way\u003C\u002Fstrong>, a swing that shifts a 10 ton order by a full ton and explains why the ticket printed at the scale house rarely matches an estimate to the tenth. A density table sizes a delivery while the weighed ticket at the gate settles the bill.\u003C\u002Fp>\u003Ch2 id=\"calculate-yards\">How to calculate yards of gravel by hand\u003C\u002Fh2>\u003Cp>Four operations reproduce what any \u003Cstrong>how much gravel do I need calculator\u003C\u002Fstrong> runs inside.\u003C\u002Fp>\u003Col>\u003Cli>Multiply length by width in feet for the area.\u003C\u002Fli>\u003Cli>Multiply that area by the depth converted to feet, since 4 in is 0.333 ft.\u003C\u002Fli>\u003Cli>Divide the cubic feet by 27 for \u003Cstrong>cubic yards\u003C\u002Fstrong>.\u003C\u002Fli>\u003Cli>Multiply those yards by the density of the chosen stone for short tons.\u003C\u002Fli>\u003C\u002Fol>\u003Cp>Take a 12 by 8 ft shed base at 3 in: 96 sq ft multiplied by 0.25 ft gives 24 cubic feet, divided by 27 gives \u003Cstrong>0.89 cubic yards\u003C\u002Fstrong>, multiplied by 1.35 gives 1.2 tons, which the allowance and the half ton rounding turn into \u003Cstrong>1.5 tons to order\u003C\u002Fstrong>. The yards line of the \u003Cstrong>gravel calculator\u003C\u002Fstrong> matters at the counter, since plenty of yards quote a price per cubic yard rather than a price per ton.\u003C\u002Fp>\u003Ch2 id=\"gravel-density\">Which gravel type weighs the most per cubic yard?\u003C\u002Fh2>\u003Cp>Decomposed granite tops the four types at \u003Cstrong>1.5 short tons per cubic yard\u003C\u002Fstrong>, ahead of pea gravel at 1.4, crushed stone #57 at 1.35 and river rock at 1.3. Rounded pebbles pack loosely and trap air between each piece, which leaves river rock the lightest of the group even though the individual stones feel heavy in the hand.\u003C\u002Fp>\u003Cp>Switching the type to pea gravel gives the \u003Cstrong>pea gravel calculator\u003C\u002Fstrong> reading of the same job without touching a single dimension. The tonnage climbs by about 4% while the cubic yards hold still, so a 10 cubic yard patio moves from \u003Cstrong>13.5 tons\u003C\u002Fstrong> of #57 to 14 tons of pea gravel, half a ton that lands on the invoice.\u003C\u002Fp>\u003Ch2 id=\"gravel-per-m2\">How much does gravel weigh per square meter?\u003C\u002Fh2>\u003Cp>One square meter of crushed stone #57 spread \u003Cstrong>5 cm deep\u003C\u002Fstrong> takes 0.05 m³ of material, close to \u003Cstrong>80 kg\u003C\u002Fstrong> at a bulk density of 1,602 kg per m³, while a 10 cm bed doubles that to 160 kg per square meter. Pea gravel runs heavier at 1,661 kg per m³ against 1,543 kg for river rock. Metric entry keeps meters for the two sides with centimeters for the depth, which matches how landscaping suppliers outside the United States quote a job.\u003C\u002Fp>\u003Cp>The recommended depths convert along with the units, which puts a driveway at 10 to 15 cm, a walkway or patio at 5 to 8 cm and a drainage trench at 15 to 30 cm. Take a 6 by 4 m patio finished in 8 cm of river rock: the bed holds \u003Cstrong>1.92 m³\u003C\u002Fstrong>, the same volume as 2.51 cubic yards, which the density of river rock turns into \u003Cstrong>3.26 short tons\u003C\u002Fstrong> before the allowance goes on top.\u003C\u002Fp>","2026-08-04T07:29:47.003Z","2026-08-18T10:00:01.758Z","2026-08-18T10:00:00.000Z","en","Gravel Calculator",[16,20,24,28,32,36],{"id":17,"question":18,"answer":19},2300,"How much gravel do I need for a 10x10?","\u003Cp>A 10 by 10 ft area measures 100 sq ft, so the only variable left for crushed stone #57 is the depth of the bed:\u003C\u002Fp>\u003Cul>\u003Cli>\u003Cstrong>2 in\u003C\u002Fstrong>: 0.62 cubic yards, 0.83 tons of stone, \u003Cstrong>1 ton to order\u003C\u002Fstrong>\u003C\u002Fli>\u003Cli>\u003Cstrong>3 in\u003C\u002Fstrong>: 0.93 cubic yards, 1.25 tons of stone, \u003Cstrong>1.5 tons to order\u003C\u002Fstrong>\u003C\u002Fli>\u003Cli>\u003Cstrong>4 in\u003C\u002Fstrong>: 1.23 cubic yards, 1.67 tons of stone, \u003Cstrong>2 tons to order\u003C\u002Fstrong>\u003C\u002Fli>\u003C\u002Ful>\u003Cp>The order figures already carry the 10% allowance and the rounding to the next half ton. Swapping the type to pea gravel lifts each line by about 4%, since pea gravel weighs 1.4 tons per cubic yard against 1.35 for #57.\u003C\u002Fp>",{"id":21,"question":22,"answer":23},2301,"How do I calculate how much gravel I need?","\u003Cp>Multiply length by width for the area, multiply that by the depth expressed in the same unit, then convert the volume to weight using the density of the stone. Working in feet, the cubic feet divided by 27, the number of cubic feet in a cubic yard, give the \u003Cstrong>cubic yards\u003C\u002Fstrong>; multiplying those yards by 1.35 gives short tons of crushed stone #57.\u003C\u002Fp>\u003Cp>Add 10% on top for settling and for what rolls off the shovel at the edges, then round up to the next half ton, the smallest increment most bulk yards will drop. A 200 sq ft driveway at 4 in runs down that chain to 2.47 cubic yards, 3.33 tons and \u003Cstrong>4 tons ordered\u003C\u002Fstrong>. Metric jobs follow the same path with cubic meters and a density in kilograms per cubic meter.\u003C\u002Fp>",{"id":25,"question":26,"answer":27},2302,"How many tons of gravel are in a cubic yard?","\u003Cp>Between \u003Cstrong>1.3 and 1.5 short tons\u003C\u002Fstrong>, depending on the material. Crushed stone #57 counts 1.35 tons per cubic yard, pea gravel 1.4, river rock 1.3 and decomposed granite 1.5. Read the other way round, one ton fills 0.74 cubic yards of #57 and 0.67 cubic yards of decomposed granite.\u003C\u002Fp>\u003Cp>Those numbers describe dry stone delivered loose. Rain-soaked material coming straight off a quarry stockpile can run 10% heavier, a gap that shows up on delivery tickets after a wet week rather than in the estimate.\u003C\u002Fp>",{"id":29,"question":30,"answer":31},2303,"Why does the calculator add 10% to the tonnage?","\u003Cp>A finished gravel bed rarely matches the rectangle drawn on paper, which is what the \u003Cstrong>10% waste allowance\u003C\u002Fstrong> covers. Raking and the first few passes of a car press the stone down into the subgrade, the compacted soil layer under the bed, while low spots in that subgrade swallow more material than a plan on paper accounts for.\u003C\u002Fp>\u003Cp>The results panel keeps both figures side by side, the exact tonnage for the area and the same tonnage with the allowance, so a supplier quote lines up against whichever one it was written from. The headline value then rounds up to the next half ton.\u003C\u002Fp>",{"id":33,"question":34,"answer":35},2304,"How deep should gravel be for a walkway or a French drain?","\u003Cp>A walkway or a patio holds up at \u003Cstrong>2 to 3 in\u003C\u002Fstrong> of gravel over a compacted base, deep enough to hide the subgrade without swallowing feet. A French drain sits at the other end of the range, \u003Cstrong>6 to 12 in\u003C\u002Fstrong> of washed stone packed around the pipe so water reaches it through the voids between the pieces.\u003C\u002Fp>\u003Cp>The depth field checks an entry against those ranges and warns in both directions. A bed run too thin lets the base show through under the first load while a bed run too deep buries tonnage that still gets weighed at the gate.\u003C\u002Fp>",{"id":37,"question":38,"answer":39},2305,"Can the calculator handle several areas at once?","\u003Cp>Yes, the Areas field multiplies the result by up to 500 identical zones, which suits two matching parking pads or a run of tree wells cut to the same size. Each side accepts up to 1,000 ft or 1,000 m, with depth up to 200 in or 200 cm.\u003C\u002Fp>\u003Cp>Zones of different sizes need one pass each with the tonnages added up afterwards. Rounding that total to the next half ton once, rather than on every pass, keeps a run of six small beds from drifting a ton or more above what the job needs.\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},554,"Gravel Calculator: How Many Tons and Cubic Yards to Order","A gravel calculator answering in tons to order, 10% waste allowance included, plus cubic yards. Pea gravel, #57 stone or river rock, depth per use.",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},[109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,6,152,153,154,155,156,157,158,159,160,161,162,163],"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","proportion-calculator","paint-calculator","tile-calculator","braille-translator","quadratic-formula-calculator","gcf-calculator","probability-calculator","hex-to-rgb-converter","uuid-generator","standard-deviation-calculator","lcm-calculator","caesar-cipher"]