How do you calculate labor burden time for a 3D printing batch?

Divide the task count by operator throughput in tasks per minute to get base hours, then add the handling allowance. With 24 tasks at 0.22 tasks per minute and a 20% allowance, base burden is about 109 hours and quoted burden is roughly 131 hours.

Why divide by tasks per minute instead of multiplying?

Throughput is a rate, so dividing the number of tasks by tasks-per-minute returns minutes, which the tool converts to hours. A higher throughput rate yields fewer labor hours, which is the correct direction.

What does the documentation and handling allowance cover?

It captures the time that does not show up in the core task rate: traveler paperwork, part logging, staging, walking between stations and inspection sign-off. A 20% allowance turns 109 base hours into 131 quoted hours in the example.

What is a reasonable handling allowance for AM post-processing?

Most bureaus use 15-30% depending on traceability requirements. Aerospace or medical work with full documentation can push past 30%; loose prototyping work may sit near 10-15%.

How do I lower labor burden hours?

Raise operator throughput with better fixturing and batch de-powdering, reduce task count by nesting smarter or designing out supports, and trim the allowance by streamlining paperwork. Throughput is the biggest lever because it divides into every task.

Should machine print time be in this number?

No. This tool is touch labor only. Print time is unattended machine time and belongs in a separate machine-hour line, otherwise you double-count or conflate two very different cost rates.

Additive Manufacturing Service Bureau Quoting calculator

AM Labor Burden Time Calculator

Labor burden time is the manual operator hours an additive batch consumes for handling tasks such as de-powdering, support removal, part picking, inspection and paperwork. It is the cost line most service bureaus underquote because machine time feels like the whole job when, in practice, hands-on touch labor often dwarfs it on small and mid parts. Estimators use this to load labor correctly into a quote, and production leads use it to staff a shift against a task backlog. Getting it wrong means margin evaporates in post-processing.

What this calculator does

Estimate service bureau operator labor hours from job count, handling throughput, and labor allowance.
an operations lead needs operator labor hours for a quote or production schedule
It computes quoted labor hours by converting a task count into base hours at a per-minute handling rate, then inflating it by a documentation and handling allowance.

Formula used

Base AM labor burden = jobs or build tasks ÷ operator handling throughput
Quoted labor burden = base burden × (1 + documentation/handling allowance)

Inputs explained

Build jobs or post-processing tasks in the batch:
Operator handling throughput:
Documentation and handling allowance:

How to use the result

Use it when pricing the manual content of a build, when staffing post-processing for a known batch, or when comparing the labor cost of two part designs.
It assumes a single steady handling throughput; if tasks vary wildly in difficulty, such as light de-powdering versus heavy support removal, split the batch and run each task type at its own rate.

Current U.S. benchmarks

The producer price index for plastic resins and materials stands at 319.371 (BLS, May 2026), up 19.5% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. prime lending rate is 6.75% (Federal Reserve via FRED, 2026-07-02). Payback and financing math should start from today's rate, not a remembered one.

Common questions

How do you calculate labor burden time for a 3D printing batch? Divide the task count by operator throughput in tasks per minute to get base hours, then add the handling allowance. With 24 tasks at 0.22 tasks per minute and a 20% allowance, base burden is about 109 hours and quoted burden is roughly 131 hours.
Why divide by tasks per minute instead of multiplying? Throughput is a rate, so dividing the number of tasks by tasks-per-minute returns minutes, which the tool converts to hours. A higher throughput rate yields fewer labor hours, which is the correct direction.
What does the documentation and handling allowance cover? It captures the time that does not show up in the core task rate: traveler paperwork, part logging, staging, walking between stations and inspection sign-off. A 20% allowance turns 109 base hours into 131 quoted hours in the example.
What is a reasonable handling allowance for AM post-processing? Most bureaus use 15-30% depending on traceability requirements. Aerospace or medical work with full documentation can push past 30%; loose prototyping work may sit near 10-15%.
How do I lower labor burden hours? Raise operator throughput with better fixturing and batch de-powdering, reduce task count by nesting smarter or designing out supports, and trim the allowance by streamlining paperwork. Throughput is the biggest lever because it divides into every task.

Last reviewed 2026-05-12.