Example Sets
| Use | Length | Height | Block WxH | Units |
|---|---|---|---|---|
| 36 | 3.5 | 1.33 × 0.67 | ft | |
| 20 | 1.2 | 0.4 × 0.2 | m | |
| 50 | 4 | 1.5 × 0.75 | ft |
Downloads
Download CSV
Run a calculation first to enable meaningful exports.
Formulas Used
- Adjusted length =
L × (1 + curve%/100) - Total run incl. returns =
adjusted_length + returns × return_length - Module width =
block_face_width + joint - Blocks per course =
ceil(total_run / module_width) - Buried courses =
ceil(buried_depth / block_face_height) - Total courses =
ceil(exposed_height / block_face_height) + buried_courses - Standard blocks =
blocks_per_course × total_courses - Corner units ≈
outside_corners × total_courses(project dependent) - Cap blocks =
ceil(total_run / cap_length) - With waste: multiply counts by
(1 + waste%/100)and round up - Gravel volume ≈
backfill_thickness × (exposed_height + buried_depth) × total_run - Trench volume =
trench_width × trench_depth × total_run - Weep outlets =
ceil(total_run / weep_spacing) - Geogrid layers =
floor(exposed_height / geogrid_spacing) - Geogrid embed length =
grid_len_ratio × exposed_height - Geogrid area =
geogrid_layers × total_run × embed_length - Geogrid rolls =
ceil(geogrid_area / (roll_width × roll_length)) - Pallet counts =
ceil(units / units_per_pallet) - Adhesive tubes =
ceil(total_run / coverage_per_tube) - Weight =
volume × density(density per chosen volume unit)
These are planning-level estimates. Always verify with manufacturer details and local design codes.
How to Use
- Select units and enter wall length and exposed height.
- Provide buried depth or click Auto-calc for a quick rule.
- Enter block dimensions; use nominal values including joints if applicable.
- Add corners, returns, cap length, and waste allowance for ordering.
- Optionally include geogrid spacing, embed ratio, and grid roll dimensions.
- Set trench size, backfill thickness, density, weep spacing, and pallets.
- Click Calculate to see counts and site quantities.
- Export results to CSV or create a PDF for submittals.
FAQs
A common guideline is to bury one full course or about 10% of wall height, plus base material. Adjust for frost depth and site conditions.
Yes. Curves and returns add length and cutting. Use the curve percentage and returns fields to model these features for more realistic totals.
Set geogrid spacing and embed ratio to get area and roll counts. Always follow manufacturer charts and local engineering requirements for final designs.
For planning, 1.4–1.6 tons/yd³ (or ~1.6 t/m³) are common for crushed stone. Verify with your supplier and adjust the density field accordingly.
Yes. Enter units per pallet and adhesive coverage per tube to get pallet counts and tube estimates for logistics and ordering.
Reference Data — Coverage by Block Size
Imperial coverage (per 10 ft course)
| Face W (ft) | Face H (ft) | Joint (ft) | Module W (ft) | Blocks / 10 ft |
|---|---|---|---|---|
| 1.33 | 0.67 | 0.02 | 1.35 | 8 |
| 1.50 | 0.50 | 0.03 | 1.53 | 7 |
| 1.00 | 0.33 | 0.02 | 1.02 | 10 |
Metric coverage (per 3 m course)
| Face W (m) | Face H (m) | Joint (m) | Module W (m) | Blocks / 3 m |
|---|---|---|---|---|
| 0.40 | 0.20 | 0.005 | 0.405 | 8 |
| 0.50 | 0.20 | 0.005 | 0.505 | 6 |
| 0.30 | 0.15 | 0.005 | 0.305 | 10 |
Reference Data — Logistics & Accessories
| Item | Typical Value | Notes |
|---|---|---|
| Blocks per pallet | 90–120 | Varies by manufacturer and block size. |
| Caps per pallet | 60–100 | Check cap length to plan accurately. |
| Corner units per pallet | 40–60 | Confirm left/right vs universal corners. |
| Adhesive coverage per tube | 18–30 ft (5.5–9 m) | Continuous beads on clean, dry surfaces. |
| Weep spacing | 6–10 ft (2–3 m) | Adjust to site drainage and spec. |
| Backfill density (crushed stone) | 1.4–1.6 tons/yd³ (~1.6 t/m³) | Use supplier value for tonnage. |