Use the yield printed on the Quikrete bag.
⚙️Calculation Parameters
📊Calculated Output
How Quikrete Sonotube Calculator Works?
To estimate Quikrete bags, the Quikrete Sonotube Calculator divides the tube volume by the yield of the selected Quikrete product label. The process takes 4 steps.
Select a Quikrete product
Pick the mix and bag size, such as Concrete Mix, 5000 Concrete Mix or Fast-Setting Concrete Mix.
Load the label yield
The calculator loads the yield printed on that bag, such as 0.60 ft³ (17 L) for an 80 lb bag.
Enter tube size and count
Type the diameter, depth and number of tubes.
Read bags and water
The tool shows the bag count and the mixing water for the selected product.
Quikrete Sonotube Calculator Formula
The Quikrete Sonotube Calculator uses the cylinder formula and a product yield.
Volume
V = π × (D ÷ 24)² × (H ÷ 12) × nCubic feet (ft³) for n tubes.
Quikrete bags
Bags = ⌈V × (1 + w) ÷ Y_product⌉Y_product from the label.
Fast-Setting placement
Dry mix poured into the hole + waterFollow the label method for fast-setting posts.
Worked example: 4 tubes at 10 in × 42 in with Quikrete Concrete Mix 80 lb
- V = 4 × 1.909 = 7.64 ft³
- With 10% waste: 8.40 ft³
- Bags = ⌈8.40 ÷ 0.60⌉ = 14 bags of 80 lb
Quikrete Sonotube Calculator Conversion Table
The Quikrete conversion table lists 5 Quikrete products with label yields and the bags needed for one 48 in (122 cm) deep tube.
| Product | Label yield | 10 in tube | 12 in tube | 16 in tube |
|---|---|---|---|---|
| Quikrete Concrete Mix 80 lb | 0.600 ft³ (17.0 L) | 4 | 6 | 10 |
| Quikrete Concrete Mix 60 lb | 0.450 ft³ (12.7 L) | 5 | 7 | 13 |
| Quikrete Concrete Mix 40 lb | 0.300 ft³ (8.5 L) | 8 | 11 | 19 |
| Quikrete 5000 Concrete Mix 80 lb | 0.600 ft³ (17.0 L) | 4 | 6 | 10 |
| Quikrete Fast-Setting Concrete Mix 50 lb | 0.375 ft³ (10.6 L) | 6 | 9 | 15 |
Yields reflect common Quikrete labels. Check the bag in hand, since formulas and labels change by region. Sonotube Concrete Calculator is not affiliated with Quikrete.
What is Quikrete Sonotube Calculator?
A Quikrete Sonotube Calculator is a bag estimator that uses the yields of Quikrete concrete products to count the bags needed for round tube forms.
Quikrete is a large US maker of bagged concrete, sold at most home centers. The brand offers several mixes for piers and posts. Concrete Mix suits general footings, 5000 Concrete Mix reaches a higher rated strength of 5,000 psi (34.5 MPa), and Fast-Setting Concrete Mix sets posts in 20 to 40 minutes. The calculator loads the yield for the product you pick.
A 12 in × 48 in tube needs 6 bags of Quikrete 80 lb Concrete Mix or 9 bags of the 50 lb Fast-Setting mix.
What are the uses of Quikrete Sonotube Calculator?
There are 4 main uses of the Quikrete Sonotube Calculator.
Home center orders
Buyers count Quikrete bags for a deck or post job.
Product comparison
Builders compare Concrete Mix with 5000 and Fast-Setting counts.
Fence post setting
Installers count Fast-Setting bags per post hole.
Strength upgrades
Contractors price a switch to 5000 psi mix for heavier loads.
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