Use the yield printed on the Sakrete bag.
⚙️Calculation Parameters
📊Calculated Output
How Sakrete Sonotube Calculator Works?
To estimate Sakrete bags, the Sakrete Sonotube Calculator divides the tube volume by the yield on the chosen Sakrete bag. The process takes 4 steps.
Choose a Sakrete mix
Select High Strength Concrete Mix, 5000 Plus Concrete Mix or Fast Setting Concrete Mix, and a bag weight.
Apply the label yield
The tool loads the yield for that bag, such as 0.45 ft³ (12.7 L) for a 60 lb bag.
Enter the tubes
Type the diameter, depth and count of the forms.
Read the order
The calculator lists the bag count, the total weight in pounds (lb) and kilograms (kg), and the bags with waste added.
Sakrete Sonotube Calculator Formula
The Sakrete Sonotube Calculator pairs tube volume with a Sakrete yield.
Tube volume
V = π × (D ÷ 24)² × (H ÷ 12)Cubic feet (ft³) per tube.
Sakrete bags
Bags = ⌈n × V × (1 + w) ÷ Y_Sakrete⌉n tubes and w waste.
Load weight
W (kg) = Bags × bag lb × 0.4536Converts pounds to kilograms.
Worked example: 6 tubes at 8 in × 36 in with Sakrete High Strength 60 lb
- V = 6 × 1.047 = 6.28 ft³
- With 10% waste: 6.91 ft³
- Bags = ⌈6.91 ÷ 0.45⌉ = 16 bags (960 lb, 435 kg)
Sakrete Sonotube Calculator Conversion Table
The Sakrete conversion table lists 5 Sakrete products and the bags needed for one 36 in (91 cm) deep tube in 3 sizes.
| Product | Label yield | 8 in tube | 10 in tube | 12 in tube |
|---|---|---|---|---|
| Sakrete High Strength Concrete Mix 80 lb | 0.600 ft³ (17.0 L) | 2 | 3 | 4 |
| Sakrete High Strength Concrete Mix 60 lb | 0.450 ft³ (12.7 L) | 3 | 4 | 6 |
| Sakrete High Strength Concrete Mix 40 lb | 0.300 ft³ (8.5 L) | 4 | 6 | 8 |
| Sakrete 5000 Plus Concrete Mix 80 lb | 0.600 ft³ (17.0 L) | 2 | 3 | 4 |
| Sakrete Fast Setting Concrete Mix 50 lb | 0.375 ft³ (10.6 L) | 3 | 5 | 7 |
Yields reflect common Sakrete labels. Confirm the yield on your bag. Sonotube Concrete Calculator is not affiliated with Sakrete.
What is Sakrete Sonotube Calculator?
A Sakrete Sonotube Calculator is a bag estimator that counts Sakrete concrete bags for round tube forms using the label yield of each Sakrete product.
Sakrete is a US brand of bagged concrete and mortar. The brand sells High Strength Concrete Mix in 40 lb, 60 lb and 80 lb bags, 5000 Plus for higher-strength work and Fast Setting Concrete Mix for posts. The calculator matches the bag count to the exact product.
A shallow 10 in × 36 in post tube needs 3 bags of Sakrete 80 lb High Strength mix, or 4 bags of the 60 lb size.
What are the uses of Sakrete Sonotube Calculator?
There are 4 main uses of the Sakrete Sonotube Calculator.
Sakrete store orders
Buyers count Sakrete bags stocked at their local store.
Shallow post footings
Owners count bags for mailbox, gate and fence posts.
High-strength piers
Builders count 5000 Plus bags for heavier deck or carport loads.
Weight planning
Users check the total load in lb and kg before pickup.
🔗Related Sonotube Calculators
View all 106 subtools →Sonotube Bag Count Calculator
Count the bags you need from the bag yield.
Custom Concrete Bag Yield Calculator
Type your own yield per bag.
Quikrete Sonotube Calculator
Use the yield printed on the Quikrete bag.
40 lb Concrete Bag Calculator
Count the 40 lb bags you need.