Concrete Calculator
Estimate concrete volume in cubic metres and litres, with ready-mix and packaged bag quantities.
Typical use: Concrete slabs, shed bases, pads, paths, footings and other rectangular pours
Using this calculator
Open the interactive calculator to enter your project measurements and adjust the available settings. Review the calculated quantity and buying units before ordering materials. Check product coverage, pack sizes and installation guidance with the manufacturer or supplier.
Further reading in this project area
How to Repoint Brickwork: A Practical DIY Guide
Understand when local brickwork repointing can be a realistic DIY repair, how to remove failed mortar without damaging the bricks, and when cracking, historic masonry or access makes professional assessment the safer choice.
- Inspect the wall before removing mortar. Look for powdery, loose, missing or badly eroded joints, but also check whether cracks run through bricks, widen over time, step around openings or suggest movement rather than simple mortar weathering.
- Consider the age and type of the masonry before choosing mortar. Older or softer brickwork can be damaged by an overly hard, impermeable cement-rich repair, so mortar compatibility matters more than using one universal mix.
- Limit DIY work to areas that can be reached and worked safely. High elevations, unstable access, large façades, listed or particularly historic masonry and walls with suspected structural movement deserve specialist advice.
- Remove failed mortar carefully back to sound material. Work along the joint without damaging the brick arrises; the aim is a clean, stable recess deep enough to hold new mortar rather than a superficial cosmetic scrape.
What Size Skip Do I Need? UK Skip Size Guide
Choose a sensible UK skip size by considering waste volume, weight, project type, access, permits, PPE and materials that may need separate disposal.
- Identify the main waste type before choosing a skip. Light bulky waste such as timber, packaging and furniture is mainly limited by volume, while soil, rubble, concrete and other dense materials are often limited by weight first.
- Estimate the volume using familiar comparisons rather than exact geometry alone. As a rough planning guide, a 2-yard mini skip may suit a very small clear-out, 4 yards a modest room or garden job, 6 yards a typical builders-skip project, 8 yards a larger renovation, and 10–12+ yards bulky lighter waste. Actual dimensions and capacities vary by supplier.
- Use bin-bag equivalents only as a rough visual aid. Providers use different bag assumptions, so compare the cubic-yard size and the supplier’s stated dimensions as well as any bag-count estimate.
- For heavy inert waste, check the operator’s restrictions before upsizing. Soil, rubble, slabs and concrete can make a large skip too heavy to lift even when it is nowhere near full by volume.