🧊 Concrete Calculator
Pouring concrete is one of the most demanding DIY jobs, and getting the quantity wrong can be expensive. Order too little, and you'll be rushing to the builders' merchant while your mix dries. Order too much, and you've wasted money on material you can't return. Our Concrete Calculator ensures you order exactly the right amount.
Whether you're pouring a garden path, a patio base, a shed foundation, or a new driveway, our calculator gives you the exact volume in cubic metres and tells you how many 20kg, 25kg, or 40kg bags of pre-mix concrete to buy. We also include a 10% wastage allowance for spills, uneven ground, and compaction.
What our concrete calculator does:
- 📐 Volume Calculation — Enter length, width, and depth to get total volume in cubic metres.
- 📦 Bag Conversion — Choose 20kg, 25kg, or 40kg bags for accurate bag counts.
- 📊 Wastage Allowance — 10% added for spills and uneven ground.
- 📋 Easy Ordering — Get a clear figure to take to the builders' merchant.
💡 Pro Tip: Always order a little extra — 5-10% more than calculated — to account for spills, uneven ground, and compaction. It's cheaper to have a bit left over than to run out mid-pour.