Makeratory Resources / Production planning
Capacity planning guide
How to calculate 3D printer capacity
Printer capacity is not 24 hours per day multiplied by the number of machines. Useful capacity is the amount of reliable production time you can actually promise.
Start with productive hours
Choose the time window you want to plan: a day, week, or month. Then estimate how many hours each printer can realistically produce during that window. Remove planned maintenance, setup, changeovers, known idle periods, and any hours you intentionally keep open for urgent work.
A simple capacity formula
Usable capacity hours = available printer hours - planned downtime - operating buffer.
If three printers are each available for 120 hours during a week, theoretical capacity is 360 printer-hours. If maintenance and setup consume 24 hours and you keep a 15% buffer on the remaining time, usable capacity is about 286 printer-hours.
Convert hours into product quantity
Once you know usable hours, divide by the real production time for the item you need to make. A five-hour product does not always mean you can fit exactly 57 units into 286 hours. Bed-clearing, startup timing, multi-color changes, post-processing, and printer compatibility can lower the real quantity.
Do not plan to 100% utilization
A schedule with no slack is fragile. One failed overnight print, nozzle issue, delayed material delivery, or urgent customer order can push every later job behind. A small shop often benefits from reserving capacity for reprints and normal disruption rather than selling every theoretical hour in advance.
Capacity is printer-specific
Two printers can have the same calendar availability and still provide different useful capacity. Build volume, nozzle size, material compatibility, speed, reliability, and AMS or multi-material requirements can determine which machine a job can actually use. Track capacity by suitable printer, not only as one fleet-wide total.
Use capacity to decide what to accept
Before promising a due date, compare the hours required by existing work plus the new order against the usable capacity of the printers that can run it. That turns scheduling from guesswork into a repeatable acceptance check.
Capacity gets easier when the shop data stays connected
Makeratory is designed to keep printers, products, production runs, filament, and shop planning in one workspace so capacity decisions do not live in a separate spreadsheet.