Enter your batch volume, target air content, and admixture type to instantly calculate the correct air-entraining agent (AEA) dosage in fluid ounces and milliliters per batch.
Free to use
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No sign-up required
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Based on ASTM C260 & ACI 318 guidance
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Imperial & metric supported
✓ Dosage in fl oz/cwt & mL/100 kg✓ Total batch dosage output✓ Works on any device✓ Last verified May 2026
Total concrete volume you are batching. Check your pour estimate or ready-mix ticket.Please enter a valid batch volume greater than 0.
Typical residential/commercial mix: 470–564 lb/yd³ (279–335 kg/m³).Please enter a valid cement content greater than 0.
Per ACI 318: mild exposure 3–5%, moderate 4–6%, severe freeze-thaw 5–7.5%.Please enter a target air content greater than 0.
Select your product family to prefill the typical dosage rate. Always verify against the manufacturer's TDS.
Find this on your product's Technical Data Sheet (TDS). One fl oz/cwt ≈ 60.9 mL/100 kg.
Results appear instantly. No sign-up required.
Your AEA Dosage Estimate
Total Batch AEA Dosage
—
Fluid Ounces (fl oz)
—
Milliliters (mL)
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Liters (L)
—Total Cement (cwt)
—Rate (fl oz/cwt)
—Target Air (%)
—Batch Volume
Step 1: Convert batch volume to yd³
Step 2: Total cement (cwt) = (cement lb/yd³ × batch yd³) ÷ 100
(or: cement kg/m³ × batch m³ ÷ 45.36 for metric)
Step 3: AEA dosage rate (fl oz/cwt) = from product TDS, adjusted for target air%
Step 4: Total AEA (fl oz) = Total cement (cwt) × Rate (fl oz/cwt)
Step 5: Total AEA (mL) = fl oz × 29.5735
Note: Dosage rates are per 1% target air. Products differ — always confirm rate against manufacturer's TDS and trial batch results before full production pour.
How to Use This Concrete Air Entrainment Calculator
Determine your batch volume and cement content.
Pull both numbers from your mix design or ready-mix ticket. Batch volume is the total concrete being placed — in cubic yards for US work or cubic meters for metric. Cement content is the amount per unit volume specified in the mix design, typically 470–564 lb/yd³ for residential and commercial flatwork.
Set your target air content.
Use the quick-select buttons for common exposure categories — 3.5% for mild climates with no freeze-thaw risk, 5–6% for moderate northern US winters, and 6–7.5% for severe freeze-thaw zones per ACI 318 Table 19.3.3.1. If your project specifications list a required air content range, use the midpoint of the range.
Select your AEA product type.
Choose the admixture family that matches your product — Vinsol resin (darker color, slower acting), synthetic surfactant (most common modern products), or tall-oil fatty acid (higher dose requirement). If you have the manufacturer's Technical Data Sheet (TDS), select Custom and enter the exact dosage rate listed for your target air content.
Use the result to measure and add AEA at the plant or mixer.
The calculator gives total fluid ounces and milliliters for the full batch. Measure with a graduated cylinder — never estimate by sight. Add AEA to the mixing water, not directly onto cement. Verify air content with a Type B pressure meter (ASTM C231) before and during discharge.
⚠ Pro Tip: This calculator provides a starting dosage. The actual AEA rate you use in the field must be confirmed by a trial batch and air meter test — not calculated values alone. Temperature, aggregate angularity, fly ash content, and mix water chemistry all shift the achieved air content from the predicted value. Design for the midpoint of your target range, not the minimum.
Air Entrainment Dosage Formula
Air-entraining admixture dosage is always expressed relative to the cement content of the batch — not the total batch volume. This is because AEA works by interacting with cement paste, and the volume of paste in the mix determines how many bubbles are formed and stabilized. The industry-standard unit in the US is fluid ounces per hundredweight of cement (fl oz/cwt), where 1 cwt = 100 lb.
Common Mix Reference Table — AEA Dosage (fl oz) by Batch Size
Synthetic AEA at 0.5 fl oz/cwt, cement content 564 lb/yd³ (335 kg/m³), 6% target air. Adjust proportionally for different rates or cement contents.
Batch Size
Total Cement (cwt)
AEA (fl oz)
AEA (mL)
Typical Use
0.5 yd³
2.82
1.41
41.7
Small repair / mixer
1.0 yd³
5.64
2.82
83.4
Post holes, small slabs
1.5 yd³
8.46
4.23
125.1
Short-load delivery
3.0 yd³
16.92
8.46
250.2
Half-truck load
5.0 yd³
28.20
14.10
417.1
Driveway pour
7.0 yd³
39.48
19.74
583.8
Standard truck load
10.0 yd³
56.40
28.20
834.4
Full truck, large slab
Verify all dosages with a trial batch and air meter test before full production. Temperature, supplementary cementitious materials, and aggregate characteristics affect achieved air content.
What Air Content Does My Concrete Need?
Target air content is governed by the exposure category of the structure — specifically, whether it will experience freeze-thaw cycles and whether it will contact deicing chemicals. Per ACI 318 Table 19.3.3.1, the exposure class determines the required air content range. Using more air than needed reduces strength; using too little allows freeze-thaw damage.
ACI 318 recommended air content by exposure class and nominal maximum aggregate size.
Exposure Class
Description
Air Content — ¾" agg.
Air Content — ½" agg.
Min. Concrete Strength
F0 — Not exposed
Interior slabs, footings, protected elements
Not required
Not required
2,500 PSI
F1 — Mild
Occasional freezing, no deicers. Patios in mild climates.
3.0–5.0%
3.5–5.5%
3,000 PSI
F2 — Moderate
Moderate freeze-thaw, no deicers. Driveways in northern US.
4.5–6.0%
5.0–6.5%
4,000 PSI
F3 — Severe
Repeated freeze-thaw with deicer exposure. Garage floors, bridge decks.
6.0–7.5%
6.0–7.5%
4,500 PSI
Each 1% increase in entrained air reduces compressive strength by approximately 4–5%. For F3 exposure at 6–7.5% air, specify at least 4,500 PSI design strength — the strength reduction from air is already factored into ACI's minimums. Never use a high air content to compensate for insufficient cement content.
Common Mistakes When Using Air-Entraining Admixtures
⚠️
Adding AEA on top of cement instead of into the mix water.
AEA must be pre-diluted into the mixing water before it contacts cement — or introduced via the plant's admixture dispenser. Dumping concentrated AEA directly onto dry cement or into a partially loaded mixer causes localized overdosing, inconsistent distribution, and unpredictable air content.
🌡️
Ignoring temperature's effect on AEA efficiency.
Hot concrete (above 80°F / 27°C) loses air faster and requires a higher AEA dose to achieve target air content. Cold concrete (below 50°F / 10°C) retains air more easily and may overshoot the target with the same dose. Always adjust for ambient and concrete temperature — do not use the same dosage summer and winter without air testing.
📐
Using an assumed dosage rate without reading the product TDS.
"Generic" AEA dosage rates are starting points only. Vinsol resin products and modern synthetic surfactant AEAs differ by a factor of 2 or more in dosage per unit air content. Using the wrong rate from this or any calculator without cross-checking the manufacturer's Technical Data Sheet is a formula for a failed air test.
🧪
Skipping the trial batch air test.
Calculated dosages predict where to start — they do not guarantee the achieved air content. Aggregate angularity, organic content in fine aggregate, fly ash fineness, and mixing time all influence the result. Run at least one trial batch with an air pressure meter (ASTM C231) before committing to a full production pour.
🚫
Combining AEA with water reducers or superplasticizers without checking compatibility.
Certain superplasticizers and lignosulfonate-based water reducers interfere with air bubble stability. Naphthalene sulfonate-based plasticizers in particular can destroy entrained air content within minutes. Always verify admixture compatibility with your AEA supplier before using multiple products in the same mix — request a compatibility test from the supplier if in doubt.
Frequently Asked Questions
Air-entrained concrete contains billions of microscopic air bubbles — typically 0.1–1 mm in diameter — intentionally introduced by a chemical admixture called an air-entraining agent (AEA). These bubbles act as pressure relief valves during freeze-thaw cycles: as water in the paste freezes and expands by about 9%, the air voids give it somewhere to go without cracking the surrounding paste matrix. Air entrainment is required by ACI 318 for concrete exposed to freezing and thawing or deicing chemicals. It also improves workability and reduces bleeding and segregation.
Each 1% increase in entrained air reduces compressive strength by approximately 4–5% for a given w/cm ratio. A mix specified at 4,000 PSI with 6% air would be expected to test around 3,200–3,400 PSI in the field — which is why ACI 318 requires minimum design strengths of 4,000–4,500 PSI for F2 and F3 exposure classes. This strength reduction is factored into the code minimums, so a properly designed air-entrained mix still meets structural requirements. Never specify air entrainment without also specifying the minimum design strength required for that exposure class.
Entrained air consists of tiny, uniformly distributed, stable bubbles (0.1–1 mm) created by the AEA surfactant. These are beneficial. Entrapped air consists of larger, irregular voids (1–10 mm+) that occur naturally during mixing and placing — essentially air that didn't escape before the concrete stiffened. Entrapped air is always present at 1–2% in any concrete mix, reduces strength without any freeze-thaw benefit, and is minimized by proper consolidation (vibration). A pressure meter test measures both types together, so subtract roughly 1–2% from your air meter reading if you want to estimate true entrained air only.
Yes, significantly. Class C fly ash (high calcium, from lignite/sub-bituminous coal) has a relatively minor effect on AEA dosage. Class F fly ash (low calcium, from bituminous coal) contains carbon particles that adsorb AEA molecules, destroying bubble stability — this is the main reason high-carbon fly ash causes variable air content and is so problematic. A loss-on-ignition (LOI) above 3% in fly ash typically requires a 20–50% higher AEA dosage to compensate. Ground granulated blast-furnace slag (GGBFS) generally requires a modest dosage increase of 10–25%. Always run a trial batch when SCMs are present.
Overdosing AEA causes excessive air content — often 10% or more — which dramatically reduces compressive strength (a 10% air content can reduce strength by 40–50% from design). Overdosed concrete also becomes difficult to finish: the foamy paste smears under floats and trowels rather than closing cleanly, and surface scaling is almost guaranteed. If air content tests high on a delivered load, do not add water to compensate — reject the load or work with your supplier to adjust the dosage for the next truck.
The standard field test is the pressure method using a Type B air meter (ASTM C231). The concrete sample is placed in the calibrated bowl, the lid is sealed, water is added to eliminate surface air, and a known pressure is applied — the resulting volume change indicates percent air content. The test takes about 10 minutes and should be performed on the first truck and periodically throughout the pour. Lightweight aggregate concrete requires the volumetric method (ASTM C173) instead, because aggregate porosity affects pressure readings. Never estimate air content visually.
Technically yes, but it is strongly discouraged and may violate your mix design specification. Field addition of AEA requires additional drum revolutions (ASTM C94 allows a maximum of 300 revolutions at mixing speed total), accurate measurement of the dosage, and an air meter test afterward to verify the result. Ready-mix producers add AEA at the plant under controlled conditions because field additions are highly variable. If a load arrives with low air content, contact the plant to discuss rejecting the load or having them adjust — do not attempt to correct it with field-added admixture for structural work.
No. Interior slabs not exposed to freezing and thawing are classified as exposure class F0 under ACI 318 — air entrainment is not required and is often undesirable because it reduces strength without providing a durability benefit. Interior floor slabs typically benefit from a lower air content (under 3%) to maximize strength and surface hardness. If your interior slab will be polished or power-troweled to a hard finish, specify non-air-entrained concrete and rely on proper mix design (low w/cm ratio) for durability.
Air-entraining admixtures must conform to ASTM C260, "Standard Specification for Air-Entraining Admixtures for Concrete." This standard covers performance requirements, testing methods (including reference concrete comparison), chemical and physical uniformity requirements, and limits on effects on compressive strength. ACI 318 requires the use of ASTM C260-compliant products for structural concrete exposed to freezing and thawing. Most major AEA products (Darex II AEA, MB-AE 90, Micro-Air, Sika AER, etc.) are certified to ASTM C260.
