The concrete tube calculator takes bag size, outer diameter, height, inner diameter, quantity, waste, weight and price of concrete tube per piece and returns price of concrete per unit volume, price of concrete per bag and bags needed. It is built for quick answers, for checking somebody else’s arithmetic, and for the moments when a formula book is not within reach.
What Is the Concrete Tube Calculator?
The concrete tube calculator turns bag size, outer diameter, height, inner diameter, quantity, waste, weight and price of concrete tube per piece into price of concrete per unit volume, price of concrete per bag and bags needed, so you can order the right amount of material the first time.
Material estimates are where projects go over budget. Getting the quantities right before the delivery arrives is worth more than any discount on the order.
How to Measure for the Concrete Tube
Measure everything in the same unit and take the largest dimension you can reasonably use rather than the average. Formwork, ground conditions and cutting waste all push the real figure above the theoretical one.
Where a plan calls for a specific thickness, check it against local building regulations before you order. The calculator reflects the relationship, not the code.
Allowing for Waste and Errors
Order a little more than the calculation suggests. The gap between the theoretical quantity and what actually arrives on site is normally waste, spillage, over-excavation and uneven grading, and all of it comes out of the same budget.
Write the figures down and compare them with what you actually used on site. That is how you build an estimate you can trust for the next job.
A Worked Example
Working through an example, with bag size set to 10, outer diameter set to 5, height set to 2, the calculator returns volume of -156,686.9336, and density of -0.000013, and bags needed of 2. Substitute your own figures and the same steps produce the same kind of answer.
Frequently Asked Questions
What do I need to work out price of concrete per unit volume?
Enter bag size, outer diameter, height, inner diameter, quantity, waste, weight and price of concrete tube per piece. The calculator then works through the relationship and reports price of concrete per unit volume, price of concrete per bag and bags needed.
What does the concrete tube actually calculate?
It takes bag size, outer diameter, height, inner diameter, quantity, waste, weight and price of concrete tube per piece and converts them into price of concrete per unit volume, price of concrete per bag and bags needed using the standard relationship for this problem. Each step is applied in turn, so every output is traceable back to the numbers you typed in.
How should I enter bag size?
Use the value you actually have, in the unit shown next to the field. Enter every value in the same unit system. The calculator assumes the figures you supply are consistent, so it cannot correct a mistake that happens before the calculation starts.
Can I use this for a quick estimate as well as a precise answer?
Yes. The calculator is built for quick checks, so round your inputs to a sensible number of significant figures and the result will be just as useful. If you need more precision, keep the same method and add digits to the inputs rather than adjusting the method itself.
Does anything you type get stored?
No. The whole calculation runs inside your browser, and nothing you enter is uploaded, logged or sent anywhere.