Get the concrete for a sign post base.
⚙️Calculation Parameters
📊Calculated Output
How Sign Post Base Concrete Calculator Works?
To size sign bases, the Sign Post Base Concrete Calculator totals the concrete in every specified base under a sign. The process takes 4 steps.
Enter the sign type
Pick a single post, a 2-post sign or a multi-pier monument.
Enter base sizes
Type each base diameter and depth from the sign drawings.
Subtract posts
Enter post sizes, if posts are embedded in the concrete.
Read totals
The calculator lists concrete in cubic feet (ft³) and cubic yards (yd³), and bags in 60 lb and 80 lb sizes.
Sign Post Base Concrete Calculator Formula
The Sign Post Base Concrete Calculator totals specified bases.
Base fill
V = Σ nᵢ × π × (Dᵢ ÷ 24)² × (Hᵢ ÷ 12) − V_postsAll bases minus posts.
Wind face
A = sign width × sign heightSquare feet (ft²) the wind pushes on.
Base weight
W = V × 145 lb/ft³Dead weight against overturning.
Worked example: monument sign on 2 piers at 16 in × 48 in
- V = 2 × 5.585 = 11.17 ft³ (0.414 yd³)
- Bags = 19 of 80 lb or 25 of 60 lb
- Base weight = 1,620 lb (735 kg)
Sign Post Base Concrete Calculator Conversion Table
The sign base conversion table lists 5 sign types with total base concrete and bag counts.
| Sign | Bases | ft³ | yd³ | 60 lb bags | 80 lb bags |
|---|---|---|---|---|---|
| Single post real-estate sign | 1 × 8 in × 24 in | 0.70 | 0.026 | 2 | 2 |
| Parking sign, 2 in post | 1 × 10 in × 30 in | 1.36 | 0.051 | 4 | 3 |
| Monument sign, 2 piers | 2 × 16 in × 48 in | 11.17 | 0.414 | 25 | 19 |
| Business pylon, 2 piers | 2 × 24 in × 60 in | 31.42 | 1.164 | 70 | 53 |
| Directional sign, 4 posts | 4 × 12 in × 36 in | 9.42 | 0.349 | 21 | 16 |
Sign bases depend on sign area, height and wind speed. Use the sign engineer or permit drawings.
What is Sign Post Base Concrete Calculator?
A Sign Post Base Concrete Calculator is a calculator that estimates the base fill for commercial, monument, parking and directional signs from specified base sizes.
Signs act like sails. Wind on the sign face tries to tip the post, and the base resists with mass and soil contact. Sign permits list base sizes, and the calculator converts them into concrete and bags.
Monument and pylon signs often sit on 2 piers. The calculator totals both and gives one order.
What are the uses of Sign Post Base Concrete Calculator?
There are 4 main uses of the Sign Post Base Concrete Calculator.
Business signs
Sign companies total pier concrete for pylons.
Monument signs
Contractors pour 2-pier monument bases.
Parking and traffic signs
Crews set many small sign bases.
Real estate signs
Agents and installers set short post bases.
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