What this retaining wall calculator calculates
A 16 ft × 2 ft wall with 16 × 8 in block faces needs 36 nominal blocks before waste and 12 cap blocks in a single row.
Formula
Wall face area ÷ block face area = blocks; length ÷ block length = caps; layer length × width × depth = gravel volume.
Worked example
With 10% waste, 36 blocks become 40. The 16 ft × 12 in × 6 in base is 8 ft³ before waste, separate from the drainage zone.
Ordering decision
Wall height, surcharge, soil, setback, geogrid, drainage outlet, and local limits govern whether a wall design is acceptable.
The page cites the applicable Uzi Tools reference table beside the calculator. Product labels, current editions, local code, and a licensed professional govern structural, electrical, and life-safety work.
How to use it
- Enter the measured dimensions and keep the displayed units beside each field.
- Review the retaining-wall blocks and drainage gravel result and the substituted formula before ordering.
- Adjust waste for the layout, cut pattern, product package, and site conditions.
- Copy or print the material list, then verify the cited product data and local requirements.
Retaining-wall blocks and drainage gravel
Use this retaining wall calculator for a straight wall with a specified block face, base, and drainage zone. It separates wall blocks, caps, base gravel, and back-drainage gravel.
Limits and professional review
Measurements, product yield, waste, moisture, and site conditions can change the order quantity. Local code and a licensed professional govern structural and electrical work.