Calculate the area and cost estimate for kitchen or bathroom countertops.
Countertops (called “worktops” in the UK) are estimated by area. Enter the number of sections (1 for a straight run, 2 for an L-shape), each section’s length and depth front-to-back, and pick the material to see a cost range. Adjust the waste percentage for cut-outs and offcuts.
| Part | Typical |
|---|---|
| Depth (front to back) | 25 in / 600 mm |
| Thickness | 30–40 mm |
| Overhang at front | 25–30 mm |
| Breakfast-bar overhang | 300 mm |
An L-shaped kitchen with a 3 m run and a 2 m run, both 600 mm deep = (3 × 0.6) + (2 × 0.6) = 3.0 m². Add 10% for the sink and hob cut-outs and joins ≈ 3.3 m² of worktop.
Tip: add the two runs but do not double-count the corner where they meet — measure to the inside of the corner for one leg.
Standard kitchen countertop depth is 25–25.5 inches (635–650 mm) from the wall to the front edge. Islands may be deeper.
Order at least 10% extra for waste, seams, and cutouts for sinks and hobs. Complex layouts may need up to 20% extra.
Quartz (engineered stone) is one of the most durable and low-maintenance options. Granite is also very durable but requires periodic sealing.
Measure the length and depth of each run, including any overhang, then add the sections together. The calculator totals the area and estimates cost.
Laminate worktops are usually 28–40 mm thick, while solid stone and quartz are typically 20–30 mm, sometimes built up at the front edge to look chunkier.
