Cement, sand & gravel calculator
Indicative breakdown per m³ at reference dosage (300 kg cement/m³). Not a substitute for design dosage.
Purchase quantity
4.12 yd³
Net measurement: 3.924 yd³ · Waste 5 %
- Cement38 bag
- Sand2.472 yd³
- Gravel2.884 yd³
- Water (indicative)142.653 gal
Ready-mix or bags? At this volume: ready-mix truck.
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Shopping list
What to buy for this calculation. Look up each material at your store.
- Cement · 38 bagSearch at The Home DepotSearch at Amazon
- Sand · 2.472 yd³Search at The Home DepotSearch at Amazon
- Gravel · 2.884 yd³Search at The Home DepotSearch at Amazon
How it's calculated (visible formula)
cement = V × kg/m³; aggregates = V × m³/m³; all × (1+waste)
- Net geometric measurement, no waste.
- Adjustable waste % for cuts and breakage.
- Purchase rounded up to sellable units (boxes, bags, buckets, boards).
Reference mix per m³ (adjust on site)
| Material | Per m³ |
|---|---|
| Cement | 300 kg (12 × 25 kg bags) |
| Sand | 0.6 m³ |
| Gravel | 0.7 m³ |
| Water | ≈180 l |
| Quikrete / Sakrete bag yield | 80 lb ≈ 0.6 ft³ (≈17 l); 60 lb ≈ 0.45 ft³ (≈13 l); 40 lb ≈ 0.3 ft³ (≈8.5 l) |
Worked example: 3 m³
- Cement: 900 kg → 36 × 25 kg bags
- Sand: 1.8 m³; gravel: 2.1 m³
→ See breakdown with waste applied.
Common mistakes
- Taking the reference dosage as structural.
- Ordering aggregates with no bulking.
From calculation to quote
Add labor, overhead and your margin, and generate the professional PDF.
FAQs
- Valid for structural concrete?
- Not as final dosage: get it from the engineer or the plant.
- How much cement per cubic yard of concrete?
- About 230 kg (≈510 lb, roughly 10 × 50 lb bags) at reference dosage. Design dosage comes from the engineer.
- How much sand and gravel per yard?
- About 0.6 m³ sand and 0.7 m³ gravel per m³ of concrete (≈0.6/0.7 yd³ per yd³), plus waste.
- How many cement bags for 4 cubic yards?
- 4 yd³ ≈ 3.05 m³ → about 915 kg net: 37 × 25 kg bags, plus waste.
- How much water per yard?
- About 180 l per m³ (≈36 gal/yd³) as reference. Never a substitute for design dosage.
- Can I get cubic yards and pounds?
- Yes — switch to Imperial: 1 m³ shows as ≈1.31 yd³ and 300 kg of cement as ≈660 lb.
Maintained by Srikanta M · Formula v1.0.0 · Verified 2026-09-10 · Updated 2026-09-10 · Limits: quantity estimation, not structural design or site supervision.