- Volume Calculator
- Area Calculator
- Perimeter Calculator
- Surface Area Calculator
- Circle Calculator
- Rectangle Calculator
- Triangle Calculator
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Volume of a Cylinder CalculatorCalculate the volume of a cylinder instantly using V = π·r²·h. Enter the radius and height to get volume, base area, and total surface area.
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Hypotenuse Calculator from Two LegsFind the hypotenuse of a right triangle from its two legs using the Pythagorean theorem c = √(a² + b²). Also shows area and perimeter.
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30-60-90 Triangle Sides from Short LegFind all sides of a 30-60-90 triangle from the short leg. Computes long leg (short·√3), hypotenuse (2·short), perimeter, and area instantly.
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Centripetal Acceleration CalculatorCalculate centripetal acceleration and angular velocity from tangential velocity and radius using a = v²/r and ω = v/r. Free physics tool.
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45-45-90 Triangle Hypotenuse CalculatorFind the hypotenuse of a 45-45-90 right triangle from a leg length using h = leg × √2. Also gives perimeter and area instantly.
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Arcsine CalculatorFind an angle from the opposite side and hypotenuse using arcsine. Enter both sides to get the angle in degrees and radians instantly.
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Arccosine Angle CalculatorFind the angle of a right triangle from its adjacent side and hypotenuse using θ = arccos(adjacent / hypotenuse). Results in degrees and radians.
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Rectangular Plate Weight CalculatorCalculate the weight of a rectangular metal plate or sheet from its length, width, thickness, and material density. Get kg, grams, and pounds instantly.
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Wallpaper Rolls for a Rectangular Wall CalculatorCalculate how many wallpaper rolls you need for a rectangular wall. Enter wall and roll dimensions to get the number of rolls, rounded up.
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Yards of Concrete for a Slab CalculatorCalculate how many cubic yards of concrete you need for a slab from length, width, and thickness, plus an optional waste allowance.
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Right Triangle Perimeter from Two Legs CalculatorFind the perimeter of a right triangle from its two legs. Enter leg a and leg b to get the hypotenuse and total perimeter instantly.
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Rhombus Perimeter CalculatorCalculate the perimeter of a rhombus instantly with P = 4a. Enter the side length and get the total perimeter in any unit. Free and accurate.
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Pentagon Perimeter CalculatorCalculate the perimeter of a regular pentagon instantly using P = 5s. Enter one side length and get the total perimeter in any unit.
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Net vs Gross Floor Area Calculator (Carpet to Built-up Area)Convert carpet area to built-up and super built-up area using loading and common-area factors. Free real-estate floor-area calculator.
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Keg Volume CalculatorFind how many beers are in a keg. Enter keg size and serving ounces to get servings, gallons, fluid ounces, and liters instantly.
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Milliliters to Fluid Ounces ConverterConvert milliliters (mL) to US fluid ounces (fl oz) instantly. Enter a volume and get an accurate mL to oz conversion using the 29.5735 factor.
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Fluid Ounces to Milliliters ConverterConvert fluid ounces (fl oz) to milliliters (mL) instantly. Uses 1 US fl oz = 29.5735 mL. Fast, accurate oz to mL conversion for recipes and labels.
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Barrel Volume CalculatorCalculate the volume of a barrel, cask, or drum using the Kepler approximation. Enter height and the middle & end diameters to get liters and gallons.
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Heron's Formula CalculatorFind the area of any triangle from its three side lengths using Heron's formula. Free calculator showing area, semi-perimeter and perimeter instantly.
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Mulch Bags for a Rectangular Bed CalculatorCalculate how many bags of mulch you need to cover a rectangular garden bed. Enter length, width, depth, and bag size to get the exact bag count.
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Triangle Third Angle CalculatorFind the third angle of any triangle instantly. Enter two known angles and get the missing angle using C = 180° − A − B. Free and accurate.
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Distance Between Two Points CalculatorFind the distance between two points (x1,y1) and (x2,y2) on a coordinate plane — the length of a triangle side — using the distance formula.
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Bolt Circle Diameter CalculatorCalculate the center-to-center chord spacing between bolt holes from the bolt circle diameter (BCD) and hole count, or back-solve the BCD.
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Square Centimeters of a Rectangle CalculatorCalculate the area of a rectangle in square centimeters (cm²) instantly. Enter length and width in cm to get the area using A = l × w.
