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Mulch CalculatorFree mulch calculator: find cubic yards, cubic feet and cubic meters of mulch needed for any bed shape and depth, plus bag count and total cost.
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Sandbox Sand CalculatorCalculate how much play sand you need to fill a sandbox. Enter length, width and depth to get volume, weight in pounds/tons and bag count.
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Rise Over Run to Degrees CalculatorConvert rise over run into a slope angle in degrees. Enter vertical rise and horizontal run to get the angle, percent grade, and ratio instantly.
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Pyramid Block CalculatorCalculate the total number of blocks needed to build a stepped square pyramid of n layers using the formula n(2n-1)(2n+1)/3.
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Thermal Conductivity Unit Conversion CalculatorConvert thermal conductivity between W/m·K, kW/m·K, J/cm·s, kcal/m·h, cal/cm·s, and BTU units instantly. Free, accurate physics unit converter.
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Building Coverage Ratio (Kenpeiritsu) CalculatorCalculate the building coverage ratio (kenpeiritsu), a Japan zoning measure: building footprint divided by site area, as a percent. Rounded up to 2 decimals.
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Thermal Resistance CalculatorCalculate the thermal resistance of a material layer from its thickness, thermal conductivity, and area using R = L / (k × A). Get R and conductance.
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Wind Load CalculatorCalculate the wind load force on a structure or surface from wind speed, area, drag coefficient and air density using F = ½·ρ·v²·Cd·A.
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Breaker Size CalculatorCalculate the minimum circuit breaker amperage from load power and voltage, with the 1.25 continuous-load safety factor (US NEC 80% rule).
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Copper Wire Weight CalculatorCalculate the weight of solid copper wire from its diameter and length. Uses copper density 8960 kg/m³ to return mass in kg and grams.
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Bend Allowance CalculatorCalculate sheet metal bend allowance from bend angle, inside radius, thickness and K-factor. Instant results in mm using the standard arc-length formula.
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Angle of Repose CalculatorCalculate the angle of repose of a granular material pile from its height and base radius using theta = arctan(h/r). Instant degrees and radians.
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Sound Absorption Coefficient CalculatorCalculate the average sound absorption coefficient of a room from each surface's area and α. Computes total absorption (sabins) and weighted average.
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Reverberation Time CalculatorCalculate room reverberation time (RT60) with the Sabine formula from volume, surface area, and average absorption coefficient. Fast, free acoustics tool.
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Earthwork Soil Volume Conversion CalculatorConvert earthwork soil volume between bank (in-situ), loose (excavated) and compacted states using swell factor L and compaction factor C, in cubic meters.
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Square Feet of a Rectangle CalculatorCalculate the area in square feet of a rectangle from its length and width, with instant conversions to square yards and square meters.
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Square Footage of a Circle CalculatorFind the square footage (area in ft²) of a circle from its diameter or radius. Also shows circumference, square yards, and square meters.
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Square Feet of a Triangle CalculatorCalculate the area of a triangle in square feet from its base and height. Instantly converts to square yards and square meters too.
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Yard, Feet, Inch to Meter ConverterConvert length between metric (meters, centimeters) and imperial yard-pound units (yards, feet, inches) both ways. Exact universal conversion factors.
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Cubic Yards in a Cylinder CalculatorCalculate the volume of a cylinder in cubic yards from its diameter and height. Enter dimensions in feet, inches, yards, or meters.
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Cubic Feet of a Cylinder CalculatorCalculate the volume of a cylinder in cubic feet from its diameter and height. Free online cylinder cubic feet calculator with the formula and examples.
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Bathroom Mirror Size CalculatorFind the ideal bathroom mirror width and height for your vanity. Enter counter width, side gaps and wall height to get proportional mirror dimensions in inches.
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Window Blind Size CalculatorCalculate the correct window blind size for inside or outside mount. Enter window dimensions and get the exact blind width and height in inches.
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Tree Value CalculatorEstimate the value of a tree or log using the Doyle log rule. Enter diameter, length, and price per board foot to get board feet and dollar value.
