# Concrete Yield Calculator

Convert batch weights and density into actual yield and per-m³ contents.

- Page: https://jianzhujisuan.com/en/concrete-yield
- Category: Concrete (https://jianzhujisuan.com/en/c/concrete)
- Chinese version: https://jianzhujisuan.com/zh/concrete-yield.md
- Data checked: 2026-10-25

## Quick result

With the default inputs (Cement 3600 kg, Sand 7000 kg, Gravel 11500 kg, Water 1800 kg, Measured density 2400 kg/m³): **Actual yield 9.96 m³**

## Inputs

| Parameter | Type | Default | Unit | Note |
|---|---|---|---|---|
| Cement | number | 3600 | kg |  |
| Sand | number | 7000 | kg |  |
| Gravel | number | 11500 | kg |  |
| Water | number | 1800 | kg |  |
| Measured density | number | 2400 | kg/m³ | 2350-2450 for plain concrete, about 2500 for reinforced |

## Formula

- **Batch weight**: M = cement + sand + gravel + water
- **Yield**: V = M ÷ density
- **Per m³**: mi = weight ÷ V
- **Sand ratio**: βs = sand ÷ (sand + gravel) × 100%

## Worked example

3600 + 7000 + 11500 + 1800 = 23900 kg at 2400 kg/m³ yields 9.96 m³, giving 361 kg cement, 703 kg sand, 1155 kg gravel and 181 kg water per m³ at a 37.8% sand ratio.

## Questions

### What is shortfall and how is it detected?

Shortfall means the delivered volume is less than what is invoiced. This calculator is the test: yield should equal batch weight divided by density. A batch that yields 9 m³ but is billed as 10 is 10% short. Cross-check with drum volume, weighbridge conversion and density measurement.

### Why measure density instead of assuming it?

The same mix with limestone versus granite aggregate can differ by over 100 kg/m³, and lightweight concrete sits near 1800. Assuming 2400 overstates yield by 25% for lightweight aggregate and understates it for heavy aggregate. One bucket measurement beats any textbook figure.

### What if the water-cement ratio comes out high?

Check aggregate moisture first. Sand at 5% moisture holds 350 kg of water in a 7000 kg batch; if that is not deducted from the added water, the true ratio runs more than 0.10 above the ticket and the strength drops a grade. This is the commonest cause of low strength on site, far more common than bad cement.

## Related tools

- [Concrete Volume Calculator](https://jianzhujisuan.com/en/concrete-volume): Enter length, width and thickness to get the concrete volume you need and how many truck loads that is.
- [Formwork Area Calculator](https://jianzhujisuan.com/en/formwork-area): Pick a member type, enter section and length, and get the formwork contact area plus sheet and batten estimates.
- [Concrete Mix Design Calculator](https://jianzhujisuan.com/en/concrete-mix-ratio): Work out cement, sand, gravel and water per cubic metre from the target grade and water-cement ratio.
- [Cement Quantity Calculator](https://jianzhujisuan.com/en/cement-quantity): Get total cement, bag count and the cement/fly-ash split for a given volume and grade.
- [Concrete Pour Sequencing Calculator](https://jianzhujisuan.com/en/concrete-pour-plan): Divide a slab into strips and get the volume, truck count and duration for each pour.
- [Concrete Strength Converter](https://jianzhujisuan.com/en/concrete-strength-convert): Convert between grade, MPa, psi and kgf/cm², with cube-to-cylinder correction.

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