How do you calculate good fabrication capacity per slab?

Multiply pieces per cycle by available cycles to get gross capacity, then multiply by uptime and first-pass yield. With 4 x 480 = 1,920 gross, times 90% uptime and 97% yield, good capacity is 1,676 pieces.

What is the difference between gross and good capacity?

Gross is the raw ceiling if nothing ever went wrong (1,920 in the example). Good capacity subtracts the 192 pieces lost to downtime and roughly 52 lost to yield, leaving 1,676 sellable pieces.

What is a realistic first-pass yield for stone fabrication?

Good CNC and bridge-saw shops hold 95-98% first-pass yield on countertop pieces. The 97% in the example is healthy; below 93% you are losing meaningful capacity to chips, cracks, and out-of-tolerance cuts.

How does uptime affect capacity?

Directly and proportionally. At 90% uptime you lose 10% of gross, which is the 192 pieces in the example. Pushing uptime to 95% would recover about 96 of those pieces without buying any equipment.

Should I schedule against gross or good capacity?

Always good capacity. Scheduling to the 1,920 gross figure guarantees missed dates because it assumes zero downtime and zero rework, which no shop achieves.

How do I increase good capacity per slab?

Attack the two loss terms: improve uptime with preventive blade and CNC maintenance, and lift first-pass yield with better fixturing and slab inspection. Both flow straight through to the good-capacity number.

Stone, Countertops & Engineered Surfaces calculator

Shop capacity per slab Calculator

Shop Capacity per Slab estimates how many finished, sellable countertop pieces your fabrication line can actually produce once you account for saw and CNC uptime and first-pass yield. Shop managers and schedulers use it to convert theoretical throughput into a realistic commitment they can put in front of sales, because gross capacity always overstates what leaves the door good. The calculation starts with pieces per cycle times available cycles, then discounts for the time machines are down and the pieces that fail QC on the first pass. It matters because promising gross capacity is how shops end up double-booking installs and blowing lead times.

What this calculator does

Estimate shop capacity per slab for stone, countertops and engineered surfaces using production-ready inputs so teams can confirm whether capacity can cover demand before committing the schedule.
Use it when shop capacity per slab in stone, countertops and engineered surfaces is being asked to take on more work and you need to know if there is room.
It computes good (sellable) fabrication capacity from gross capacity after uptime and first-pass yield losses.

Formula used

Gross shop capacity per slab capacity = shop capacity per slab output per cycle × available shop capacity per slab cycles
Good shop capacity per slab capacity = gross capacity × expected shop capacity per slab uptime × expected shop capacity per slab first-pass yield

Inputs explained

Finished pieces cut per fabrication cycle:
Available fabrication cycles in period:
Expected saw and CNC uptime:
Expected first-pass fabrication yield:

How to use the result

Use it for weekly scheduling, quoting realistic lead times, or sizing whether you can take on a new builder contract.
It uses steady-state averages, so it won't reflect a single major breakdown, a bridge-saw blade failure, or a batch of bad slabs that wipes out a day.

Common questions

How do you calculate good fabrication capacity per slab? Multiply pieces per cycle by available cycles to get gross capacity, then multiply by uptime and first-pass yield. With 4 x 480 = 1,920 gross, times 90% uptime and 97% yield, good capacity is 1,676 pieces.
What is the difference between gross and good capacity? Gross is the raw ceiling if nothing ever went wrong (1,920 in the example). Good capacity subtracts the 192 pieces lost to downtime and roughly 52 lost to yield, leaving 1,676 sellable pieces.
What is a realistic first-pass yield for stone fabrication? Good CNC and bridge-saw shops hold 95-98% first-pass yield on countertop pieces. The 97% in the example is healthy; below 93% you are losing meaningful capacity to chips, cracks, and out-of-tolerance cuts.
How does uptime affect capacity? Directly and proportionally. At 90% uptime you lose 10% of gross, which is the 192 pieces in the example. Pushing uptime to 95% would recover about 96 of those pieces without buying any equipment.
Should I schedule against gross or good capacity? Always good capacity. Scheduling to the 1,920 gross figure guarantees missed dates because it assumes zero downtime and zero rework, which no shop achieves.

Last reviewed 2026-05-12.