- Volume Calculator
- Area Calculator
- Perimeter Calculator
- Surface Area Calculator
- Circle Calculator
- Rectangle Calculator
- Triangle Calculator
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Missing Angle from Law of Sines CalculatorFind a triangle's unknown angle using the Law of Sines: A = arcsin(a·sin B / b). Enter two sides and one opposite angle to solve instantly.
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Missing Side from Law of Sines CalculatorFind an unknown triangle side using the Law of Sines: enter a known side, its opposite angle, and the angle opposite the missing side.
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Cooking Measurement ConverterConvert cooking measurements between cups, tablespoons, teaspoons, fluid ounces and milliliters instantly with US customary volume equivalents.
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Rectangular Room Square Footage CalculatorCalculate the square footage of a rectangular room instantly. Enter length and width in feet to get area in sq ft, sq yards, and sq meters.
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Arctangent (Arctan) CalculatorFind the angle θ from the opposite and adjacent sides using θ = arctan(opposite/adjacent). Get the result in both degrees and radians instantly.
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Missing Side of a Rectangle from Perimeter CalculatorFind the unknown side of a rectangle from its perimeter and one known side. Uses missing_side = P/2 − known_side. Instant, free, and accurate.
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Degrees-Minutes-Seconds to Decimal Degrees CalculatorConvert latitude/longitude in degrees, minutes and seconds (DMS) to decimal degrees instantly using decimal = D + M/60 + S/3600.
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Rectangular Carpet Cost CalculatorEstimate the cost of carpeting a rectangular room. Enter length, width and price per square metre to get total floor area and carpet cost instantly.
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Missing Side of a Rectangle from Area CalculatorFind the missing side of a rectangle from its area and one known side. Enter area and a side to get the other side plus the perimeter instantly.
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Maximum Area Rectangle for a Fixed PerimeterFind the maximum area of a rectangle for a given fixed perimeter. The optimum is always a square with side P/4 and area (P/4)². Free online tool.
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Belt Length Around Two Pulleys CalculatorCalculate the approximate length of an open belt around two pulleys from their diameters and center distance using the standard belt-length formula.
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Rectangular Wall Area CalculatorCalculate the area of a rectangular wall from its length and height, then subtract doors and windows to get the net paintable or tileable area in m².
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Circle Degrees to Arc Length CalculatorConvert a circle's central angle in degrees and radius into arc length. Free calculator with the L = (θ/360) × 2πr formula, radians, and circumference.
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Tile Area CalculatorCalculate how many tiles you need for a floor or wall. Enter room and tile dimensions plus a wastage allowance to get the exact tile count.
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Carpet Area CalculatorCalculate how many square yards of carpet you need from room length and width in feet, with an optional waste allowance for cuts and seams.
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Regular Polygon Area CalculatorCalculate the area of any regular polygon from its number of sides and side length. Also returns apothem, perimeter, and interior angle instantly.
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Marla to Square Feet CalculatorConvert Marla to square feet instantly. 1 Marla = 272.25 ft². Also shows square yards and square meters for land area in Pakistan and India.
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Aquarium Volume CalculatorCalculate aquarium volume in gallons and liters from length, width, and height. Works with inches or centimeters for any rectangular fish tank.
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Bigha to Square Feet CalculatorConvert Bigha to square feet (ft²) for Indian land area. Pick your region's Bigha standard or set a custom factor. Also shows acres and square meters.
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Cubic Feet to Cubic Yards CalculatorConvert cubic feet (ft³) to cubic yards (yd³) instantly. Just divide by 27. Free, accurate volume converter for concrete, mulch, gravel and soil.
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Cubic Meters to Cubic Feet CalculatorConvert cubic meters (m³) to cubic feet (ft³) instantly. Enter a volume in m³ and get the exact ft³ result using the factor 35.3147.
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Pints to Cups ConverterConvert pints to cups instantly. Uses US measure (1 pint = 2 cups). Enter pints and get the exact number of cups for cooking and recipes.
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Milliliters to Liters ConverterConvert milliliters (mL) to liters (L) instantly. Enter any volume in mL and get the exact result in liters using L = mL / 1000.
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Liters to Milliliters ConverterConvert liters (L) to milliliters (mL) instantly. Enter a volume in liters and get the exact equivalent in mL using mL = L × 1000.
