Check if your bags made what they should.
⚙️Calculation Parameters
📊Calculated Output
How Concrete Yield Check Calculator Works?
To check yield, the Concrete Yield Check Calculator compares the volume a set of bags filled with the yield printed on the label. The process takes 4 steps.
Record bags used
Type the number of bags mixed for a measured pour.
Measure the fill
Enter the tube size and the fill height reached, or the volume of a known container.
Compute actual yield
The calculator divides the measured volume by the bags used.
Compare
The tool shows the difference from the stated yield and the effect on your job bag count.
Concrete Yield Check Calculator Formula
The Concrete Yield Check Calculator measures yield in the field.
Actual yield
Y_actual = V_measured ÷ bagsCubic feet (ft³) per bag.
Variance
Δ% = (Y_actual − Y_stated) ÷ Y_stated × 100%Negative means short yield.
Corrected bags
Bags = ⌈V ÷ Y_actual⌉Use for the rest of the job.
Worked example: 4 bags of 80 lb filled a 12 in tube to 35.5 in
- V = 0.7854 × (35.5 ÷ 12) = 2.323 ft³
- Y_actual = 2.323 ÷ 4 = 0.581 ft³ per bag
- Δ% = (0.581 − 0.600) ÷ 0.600 = -3.2%
Concrete Yield Check Calculator Conversion Table
The yield check conversion table lists sample field yields against stated yields and the effect on a job of 8 piers at 10 in × 48 in (17.45 ft³).
| Product | Stated ft³ | Measured ft³ | Variance | Bags: actual vs stated |
|---|---|---|---|---|
| 80 lb bag A | 0.600 | 0.580 | -3.3% | 31 vs 30 |
| 80 lb bag B | 0.600 | 0.610 | +1.7% | 29 vs 30 |
| 60 lb bag | 0.450 | 0.430 | -4.4% | 41 vs 39 |
| 50 lb fast-setting | 0.375 | 0.360 | -4.0% | 49 vs 47 |
| 25 kg bag | 0.388 | 0.370 | -4.8% | 48 vs 45 |
Measured yields are sample values. Water content, rodding and form bulge change field yield.
What is Concrete Yield Check Calculator?
A Concrete Yield Check Calculator is an audit tool that compares the volume a bag of premix fills on site with the yield stated by the manufacturer.
Field yield can differ from the label. Extra rodding removes air, a dry mix packs tighter and spilled concrete never reaches the form. A 3% short yield adds 1 bag for every 33 bags planned. The calculator measures the real figure from one tube and corrects the rest of the order.
The check needs only a known tube, a tape and a bag count.
What are the uses of Concrete Yield Check Calculator?
There are 4 main uses of the Concrete Yield Check Calculator.
Order correction
Crews adjust remaining bags after the first pier.
Product comparison
Contractors compare brands by measured yield.
Supplier audits
Buyers check bag yield claims.
Estimating data
Estimators store field yields for future jobs.
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