Who this is for
This is for someone who has never built a workbench and perhaps never built much of anything. It assumes you have a few common tools: a tape measure, a square, a saw (a hand saw works, a circular saw is faster), a drill and driver, clamps and sandpaper. The aim is a plain, sturdy bench that you can use right away and modify later.
All dimensions below are hypothetical, chosen to make the arithmetic simple. Adjust them to your height and space. Wear eye and hearing protection when cutting and drilling, and use a dust mask when sanding.
Step 1: Decide the size
For this example, we will plan a bench 60 inches long, 24 inches deep and 34 inches high. Whether 34 inches is right for you depends on your build, so see the notes on workbench height before you commit. A good test is to stand at a counter or table of similar height and see whether it feels comfortable for the kind of work you plan to do.
Step 2: A hypothetical cut list
The bench uses construction lumber and one sheet of plywood. A 2x4 is actually about 1.5 by 3.5 inches, which matters for your measurements. Understanding how lumber is sold is explained in lumber grades and dimensions.
The top is two layers of 3/4-inch plywood, so it is 1.5 inches thick. The top rails sit flush with the top of the legs, so each leg is 34 − 1.5 = 32.5 inches long.
- Legs: eight pieces of 2x4 at 32.5 inches. Join two together per leg, which makes each leg about 3 inches thick by 3.5 inches wide. Turn the legs so the 3.5-inch faces run along the depth of the bench.
- Long rails (top): two 2x4s at 54 inches. That is the 60-inch length minus the width of a leg at each end (2 × 3 inches).
- Short rails (top): two 2x4s at 17 inches. That is the 24-inch depth minus the 3.5-inch legs at each side (2 × 3.5 = 7; 24 − 7 = 17).
- Lower stretchers: two at 54 inches and two at 17 inches, set about 8 inches above the floor.
- Top: one 4 by 8-foot sheet is 48 by 96 inches, so two pieces of 60 by 24 inches fit with leftover strips (24 + 24 = 48 across, 60 of 96 along). Glue and screw the two pieces together for the 1.5-inch top.
Check this arithmetic against your actual lumber before you cut. Real lumber varies, and so do plans.
Step 3: Buy and prepare lumber
Choose boards that are straight, with few knots and no obvious twist. Sight down the edge of each board. If you cannot avoid a slightly curved board, use it for a part that will be held straight by something else. See the advice on warped and twisted boards for why this matters. Store the lumber flat in your shop for several days so it can adjust, as covered in drying and acclimating lumber.
Step 4: Cut accurately
Mark with a sharp pencil and a square. Cut on the waste side of the line, then trim to the line if needed. Cutting pieces of the same part to the same length together reduces differences. Using one piece as a template for marking the others helps too. A circular saw guided by a straightedge or a speed square cuts clean square ends when used with care, as explained in the guide to a speed square.
Clamp the work firmly before cutting, keep both hands away from the blade path and wait for the blade to stop before setting the tool down. Unplug or remove the battery before changing blades.
Step 5: Assemble the end frames
Lay out two legs and two rails to form each end frame. Pre-drill and countersink screw holes to prevent splitting, using the approach in pilot holes. Glue and screw the joints. Check each end frame for square by measuring both diagonals; they should match. Adjust before the glue dries.
Step 6: Join the ends
Stand the two end frames upright and connect them with the long rails and stretchers. A helper or clamps will keep parts from falling. Once all rails are on, measure the diagonals again, this time on the whole bench, and check that all four legs touch the floor evenly. If not, check for square and for any twisting.
Step 7: Add the top
Glue and screw the first plywood layer to the top rails, then add the second layer, staggering screws so they miss each other. Countersink all screw heads. Trim or sand the edges flush, and break the sharp corners. If you are fastening to the frame firmly, plywood is generally less prone to seasonal movement than solid boards.
Step 8: Finish and level
Sand the top and edges, working up the grits. A coat of oil or a clear finish helps resist spills. Level the bench with adjustable feet or by trimming carefully, then test it by pushing from the side. If it racks, add diagonal braces.
What to do next
After using the bench for a few weeks, you will know what is missing. Common additions are a vise, a shelf and extra clamps, covered in later projects. Resist the urge to rebuild immediately; use it first.