Measurement calculators.
Work from measured boundaries, geometry and compatible units before moving on to material quantities.
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Square Footage & Area Calculator
Calculate square footage or square metres for one room or several mixed shapes, with exclusions and a combined total.
Open calculatorMeasurementVolume Calculator
Find the volume of a rectangular space in cubic yards or cubic metres.
Open calculatorMeasurementPerimeter Calculator
Add the measured boundary segments of a space, including repeated edges.
Open calculatorMeasurementCircumference Calculator
Find the distance around a circular edge and the total for repeated rings.
Open calculatorMeasurementRise and Run Angle Calculator
Calculate the geometric angle and diagonal from a rise and horizontal run.
Open calculatorMeasurementConstruction Unit Converter
Convert a known length, area, volume, mass, liquid volume or coverage value.
Open calculatorMeasurementMaterial Weight Calculator
Calculate material mass from supplied volume and density, with separate container tare.
Open calculatorMeasurementCircle Area Calculator
Find the plan area inside a measured circular boundary.
Open calculatorMeasurementTriangle Area Calculator
Measure a triangular surface using a base and its perpendicular height.
Open calculatorMeasurementTrapezoid Area Calculator
Measure a surface with two parallel edges of different lengths.
Open calculatorMeasurementEllipse Area Calculator
Find the plan area of an oval from its two full axis lengths.
Open calculatorMeasurementCircular Sector Area Calculator
Find the area of a circular wedge from its radius and centre angle.
Open calculatorMeasurementRing Area Calculator
Find the area between two concentric circular boundaries.
Open calculatorMeasurementPolygon Area Calculator
Measure an irregular plan outline from ordered coordinate points.
Open calculatorMeasurementCylinder Volume Calculator
Find the geometric capacity of a straight round container.
Open calculatorMeasurementCone Volume Calculator
Find the geometric volume of a cone that narrows to a point.
Open calculatorMeasurementFrustum Volume Calculator
Find the volume of a tapered round container with two flat ends.
Open calculatorMeasurementSphere Volume Calculator
Find the volume enclosed by a complete sphere.
Open calculatorMeasurementEllipsoid Volume Calculator
Find the volume enclosed by an oval body from three full axes.
Open calculatorMeasurementPrism Volume Calculator
Convert a known constant cross-sectional area and length into volume.
Open calculatorMeasurementPyramid Volume Calculator
Find the volume of a pyramid from its base area and perpendicular height.
Open calculatorMeasurementMeasured Section Volume Calculator
Estimate a varying volume from areas measured at successive stations.
Open calculatorMeasurementRectangle Diagonal Calculator
Check the corner-to-corner dimension of a measured rectangle.
Open calculatorMeasurementArc Length Calculator
Solve a circular arc from radius and angle, radius and arc length, or angle and arc length.
Open calculatorMeasurementDrawing Scale Calculator
Translate a measured drawing length into an actual length using the stated scale.
Open calculatorMeasurementBox Surface Area Calculator
Measure the exposed area of a rectangular box with an optional open top.
Open calculatorMeasurementCylinder Surface Area Calculator
Measure a round body’s curved surface and selected end faces.
Open calculatorMeasurementTriangle from Three Sides Calculator
Find area and perimeter when you can measure three edges but cannot measure a perpendicular height.
Open calculatorMeasurementCircular Segment Area Calculator
Measure the area cut off by a straight chord of a circular boundary.
Open calculatorMeasurementCapsule Area Calculator
Measure a straight central strip with two semicircular ends.
Open calculatorMeasurementTriangle from Two Sides and Angle Calculator
Find the third edge and area from two measured edges and their included angle.
Open calculatorMeasurementHorizontal Cylinder Fill Calculator
Calculate liquid already in a horizontal cylindrical tank from the measured liquid depth.
Open calculatorMeasurementHollow Tube Material Calculator
Calculate the solid material volume and mass in a hollow tube from inside and outside diameters.
Open calculatorMeasurementOverlapping Rectangle Union Calculator
Measure the combined covered area of axis-aligned rectangular zones without counting overlaps twice.
Open calculatorMeasurementBearing and Distance Traverse Calculator
Convert a measured chain of bearings and distances into a closed-plan area and show the remaining closure gap.
Open calculatorMeasurementRectangle Diagonal Measurement Check Calculator
Compare two measured diagonals with the length implied by a supplied rectangle, without certifying squareness.
Open calculatorMeasurementMeasured Three Dimensional Route Calculator
Add straight route segments from measured three-dimensional points, plus specified end tails and slack.
Open calculatorMeasurementSegmental Arch Opening Geometry Calculator
Combine a rectangular opening with a supplied minor circular arch to obtain face area and curved boundary length.
Open calculatorMeasurementTwo Point Measurement Correction Calculator
Apply a supplied two-point linear scale correction to a measured length and identify interpolation versus extrapolation.
Open calculatorMeasurementVolume Measurement Range Calculator
Show how stated measurement tolerances affect a rectangular volume.
Open calculatorMeasurementRounded Rectangle Area Calculator
Measure a rectangular outline with four equal rounded corners.
Open calculatorMeasurementRegular Polygon Area Calculator
Measure a regular polygon from its side count and circumradius.
Open calculatorMeasurementEllipse Boundary Length Calculator
Estimate an oval boundary length rather than only its area.
Open calculatorMeasurementSpherical Cap Volume Calculator
Measure a spherical end cap from sphere radius and cap height.
Open calculatorMeasurementSpherical Shell Material Calculator
Separate a hollow spherical shell’s material from its internal capacity.
Open calculatorMeasurementTorus Volume Calculator
Measure a circular tube swept around a closed ring.
Open calculatorMeasurementTapered Rectangular Container Calculator
Find capacity when both rectangular dimensions change linearly with height.
Open calculatorMeasurementParabolic Barrel Profile Volume Calculator
Estimate a bulging container only when its supplied profile is parabolic.
Open calculatorMeasurementVertical Tank Freeboard Calculator
Convert a known liquid addition into geometric fill height and overflow.
Open calculatorMeasurementOverlapping Circular Areas Calculator
Avoid double counting where two circular measured areas overlap.
Open calculatorMeasurementRadius from Chord and Rise Calculator
Infer a circular radius when only a straight chord and arc rise can be measured.
Open calculatorMeasurementCone and Frustum Sheet Development Calculator
Find the flat sector needed for an ideal cone or tapered round sleeve.
Open calculatorMeasurementRight Triangle Solver
Solve a right triangle from two independent supplied lengths or a supplied angle and length.
Open calculatorMeasurementCompound Miter Geometry Calculator
Find mathematical miter and bevel angles for a symmetric decorative corner from supplied corner and spring angles.
Open calculatorMeasurementAngle Format Converter
Convert supplied decimal degrees, radians or degrees–minutes–seconds without confusing angles with elapsed time.
Open calculatorMeasurementFeet Inch Dimension Arithmetic Calculator
Add or subtract lengths, multiply two lengths into area, or divide lengths into a ratio with fractional input.
Open calculatorConnect these calculations
Measure and check your purchase assumptions
Check a rounded corner radius against the full outline
Can four rounded corners fit the measured rectangle?
Read guidecomparisonDistinguish polygon apothem from centre-to-corner radius
Which centre dimension did you measure on a regular polygon?
Read guideguideWhy averaging oval diameters is not an exact perimeter
Can an ellipse boundary be treated as a circle with average diameter?
Read guidetroubleshootingA spherical cap height is not its share of total volume
Does a cap with one-quarter of sphere height hold one-quarter of its volume?
Read guideguideUse the centreline radius when measuring a toroidal ring
Is the entered major radius the outside edge or the tube centreline?
Read guidecomparisonWhy the average end areas can misstate a tapered box volume
Do length and width both change along the height?
Read guidecomparisonChoose a measured profile over an assumed barrel shape
Do three barrel diameters prove that its sides follow a parabola?
Read guideguideDistinguish geometric tank headroom from permitted working capacity
What does spare volume after a proposed addition actually mean?
Read guidecomparisonCount the union of overlapping circular measured areas
Are two circular bed or surface areas sharing a region?
Read guideguideMeasure circular arc rise from its chord, not from the centre
Where should the rise measurement begin when inferring radius?
Read guidecomparisonCompare a curved sleeve’s developed area with its rectangular bounding sheet
Why is circumference times height not a cone’s developed sheet shape?
Read guidecomparisonCount shared rectangular coverage once
Does summing measured zones count a shared portion more than once?
Read guidetroubleshootingKeep the closing edge visible in a measured traverse
What does an area result mean when the final measured point misses the start?
Read guidetroubleshootingRead diagonal differences without declaring a frame square
Do two equal diagonal readings prove the supplied shape is a rectangle?
Read guideguideKeep vertical route sections in a length takeoff
Why can a plan-view route omit needed linear material?
Read guideguideDo not assume every curved opening has a semicircular head
What changes when the supplied arch rise is less than half its width?
Read guidecomparisonKeep interpolation and extrapolation separate in a length correction
What assumption is added when a reading falls beyond both references?
Read guideguideConvert horizontal tank depth to volume
Why is liquid depth not proportional to volume in a horizontal cylinder?
Read guideguideChoose a triangle measurement method
Which triangle inputs can be measured reliably for your boundary?
Read guideguideSeparate tube wall material from the internal void
Which diameter belongs in a tube material or liquid-capacity estimate?
Read guide