Retaining Wall Block Calculator

How to calculate

Blocks are rounded up per course and courses are rounded up by height. Caps are counted separately and excluded from regular block height. Returns, corners and curves are not included.

Worked example

Length (ft): 20 · Exposed block height (ft; excludes caps): 2 · Block face length (in): 16 · Block course height (in): 6 · Additional buried courses: 1 · Cap length (in): 16 · Extra material (%): 10.

These inputs produce 83 wall blocks. Change the measurements above to match your project.

Before you order

Use manufacturer dimensions and an approved wall layout. This is not a stability, reinforcement, drainage or permit check. Base stone, backfill and geogrid are separate materials.

For an irregular footprint, split the project into rectangles. Calculate each section and combine unrounded quantities before rounding the final order. Ask the supplier to confirm product yield and available package sizes.

Common questions