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Published January 15, 2026 • Updated August 27, 2026

Showing 25 to 36 of 48 results

Technical illustration of a cylinder with a conical bottom showing dimensions

Guides

Cylinder with Conical Bottom: Total Combined Tank Volume

Calculate volume for composite cylindrical tanks with conical bottoms. Combines pi r2 h1 + 1/3 pi r2 h2 for breweries, silos and chemical hoppers.

Technical illustration of a circular Sonotube concrete form with dimensions

Guides

Sonotube Concrete Calculator: Yards and Bags for Tubes

Calculate concrete volume for circular sonotube forms. Enter tube diameter and depth to get cubic yards, 60 lb and 80 lb bag counts with 10% waste.

Visual showing a drilling rig creating a borehole and a larger pile of loose fluffed dirt coming out

Guides

Borehole Dirt Volume: Calculate Excavation in m3 and Yards

Calculate dirt volume from borehole drilling. Uses V = pi r squared depth with a 20% to 30% soil swell factor to find total truckloads required.

Cross-section diagram showing how to calculate gravel for a culvert pipe in a trench

Guides

Gravel for Culvert Pipe: Bedding and Backfill Calculator

Calculate gravel volume and tons needed around a culvert pipe. Subtracts pipe volume from trench volume with a 1.4 tons per cubic yard density factor.

Diagram of a cylindrical pile foundation showing radius, diameter, and height dimensions

Guides

Cylindrical Pile Foundation Volume: Concrete Bore Sizing

Calculate concrete volume for drilled shafts and auger cast pile foundations. Uses V = pi r squared depth plus an 8% to 15% overage contingency.

Calculations for cylindrical pillars showing radius and height dimensions

Guides

Concrete for Round Pillars: Calculate Cubic Yards and Bags

Calculate concrete needed for round pillars and structural piers. Uses V = pi r squared h to output cubic yards, cubic metres and premix bag counts.

Diagram showing the volume of a hemisphere formula V = (2/3)πr³

Geometry

Volume of a Hemisphere Calculator: V = 2 over 3 pi r3

Calculate hemisphere volume using V = 2/3 pi r cubed. Learn dome, bowl and tank head capacity with worked radius and diameter examples in litres.

Kid-friendly cylinder diagram with diameter, radius, and height labels

Math Education

Teach Cylinder Volume to Kids: 5 Hands-On Experiments

Simple ways to explain cylinder volume to kids using rice, water and playdough. Demonstrates V = base area times height with engaging 3D activities.

Guides

Volume Unit Conversion Guide: cm3, Litres, Gallons, ft3

Convert volume units across metric and imperial systems. Includes exact multipliers for cm3 to litres, cubic inches to gallons, and m3 reference tables.

Math Foundations

The Role of Pi in Cylinder Formulas: Geometry Explained

Discover why Pi appears in cylinder volume and surface area equations. Traces circular geometry from Archimedes to modern 64-bit float engineering.

Visual comparison of cone and cylinder volumes showing the one-third relationship with matching radius and height

Math Proofs

Why Cone Volume Is 1/3 of a Cylinder: Visual Math Proof

Visual and geometric proof showing why a cone holds exactly 1/3 the volume of a cylinder with matching radius and height. Uses Cavalieri principles.

Concrete column volume estimation showing formula and wastage

Guides

Concrete Column Volume: Estimate Bags, Yards and Cost

Calculate concrete volume for round columns and pillars. Uses V = pi r squared h, with yard conversions, 80 lb bag counts and a 10% waste factor.