- Volume Calculator
- Area Calculator
- Perimeter Calculator
- Surface Area Calculator
- Circle Calculator
- Rectangle Calculator
- Triangle Calculator
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Radius from Circumference CalculatorFind a circle's radius from its circumference using r = C / (2π). Also returns diameter and area instantly. Free, accurate geometry calculator.
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Area from Radius CalculatorCalculate the area of a circle from its radius using A = πr². Also returns diameter and circumference instantly. Free, accurate circle area tool.
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Degrees to Radians CalculatorConvert degrees to radians instantly. Enter any angle in degrees and get the exact radian value plus its multiple of π using radians = degrees × π / 180.
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Diameter from Radius CalculatorFind a circle's diameter from its radius instantly using d = 2r. Also returns circumference and area. Fast, free, and accurate geometry tool.
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Circumference from Radius CalculatorCalculate the circumference of a circle from its radius using C = 2πr. Instantly get circumference, diameter, and area from any radius value.
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Total Square Footage Calculator (Multiple Rooms)Add up the square footage of multiple rooms at once. Enter each room's length and width to get total square feet, square yards, and square meters.
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Gallons of Water in Pool CalculatorCalculate how many gallons of water fill your swimming pool. Enter length, width, and average depth in feet for an instant US gallon estimate.
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Square Feet to Cubic Feet CalculatorConvert square feet to cubic feet instantly. Enter floor area and depth/height to get volume in ft³ (and cubic yards) for concrete, mulch, soil and more.
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Curved Surface Area of a Cylinder CalculatorCalculate the curved (lateral) surface area of a cylinder instantly using CSA = 2πrh. Enter the radius and height to get the result in square units.
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Floor Area CalculatorCalculate floor area and square footage instantly. Enter length and width to get area in square feet, square meters, and square yards.
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Triangular Pyramid (Tetrahedron) Surface Area CalculatorCalculate the surface area of a triangular pyramid (tetrahedron) from base edge and slant height. Free, instant SA = (√3/4)·a² + (3/2)·a·l calculator.
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Swimming Pool Surface Area CalculatorCalculate the water surface area of a rectangular swimming pool from its length and width. Get results in square feet and square meters instantly.
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Area Between Two Curves CalculatorCompute the area between two curves f(x) and g(x) over an interval [a,b] using definite integration of |f−g|. Handles crossings automatically.
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Roof Pitch Area Multiplier CalculatorCalculate actual roof surface area from footprint and pitch. Find the slope multiplier factor for any rise/run pitch like 6/12 or 12/12 instantly.
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Room Perimeter Calculator for Baseboard & TrimCalculate the perimeter of a rectangular room and the linear feet of baseboard or trim you need, minus doorways and plus a waste allowance.
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Gravel Coverage Area CalculatorCalculate how much gravel you need for a project. Enter area, depth, and density to get volume in cubic feet, cubic yards, and tons.
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Perimeter of an L-Shape CalculatorCalculate the perimeter of an L-shaped figure from its overall outer width and height using P = 2 × (a + b). Fast, free, and accurate.
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Epoxy Resin Coverage CalculatorCalculate how much epoxy resin you need for any project. Enter length, width, and coating thickness to get volume in fluid ounces and gallons, with overage.
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Fertilizer Coverage CalculatorCalculate how much fertilizer you need for any lawn or garden area using the application rate and product coverage. Fast, free, and accurate.
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Ceiling Area CalculatorCalculate ceiling area in square feet from length and width. Get square footage plus square meters and square yards for paint or tile estimates.
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Acres to Cents ConverterConvert acres to cents instantly with this Indian land unit converter. 1 acre = 100 cents. Fast, accurate area conversion for property and real estate.
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Cents to Square Feet ConverterConvert cents to square feet instantly. 1 cent = 435.6 ft². Free Indian land unit converter with square meters and acres output.
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Square Yards to Square Feet ConverterConvert square yards to square feet instantly. Enter an area in yd² and get ft² using the exact factor 1 square yard = 9 square feet.
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Square Miles to Square Kilometers ConverterConvert square miles to square kilometers instantly. Enter any area in mi² to get km² using the exact factor 1 mi² = 2.589988 km².
