One person working for one hour. Two people for eight elapsed hours equal sixteen crew-hours, which is why elapsed hours must not be priced directly.

Does the calculator decide legal overtime?

No. Enter the regular-hour allocation and multiplier established by payroll, contract and company policy; the tool only prices the split you declare.

Where does supervision go?

Include directly assigned supervision in the loaded rate or in overhead, but never in both places.

Why separate touch time?

Per-part masking and inspection scale with batch size even when the setup and blasting crew stages do not, so they change the cost per part.

Abrasive Blasting, Shot Peening & Surface Prep calculator

Abrasive Blast Crew-Hour and Labor Cost Calculator

Cost blast labor in crew-hours rather than elapsed hours, then price regular and overtime separately. Enter the batch count, crew-hours on the job, per-part touch minutes, the loaded rate, the regular allocation and the overtime multiplier.

What this calculator does

Labor cost from crew-hours on the job, per-part touch time, a loaded rate and an overtime allocation.

Formula used

Touch crew-hours = parts × masking and inspection minutes ÷ 60
Total crew-hours = crew-hours on the job + touch crew-hours
Regular hours = min(total, allocation); overtime = max(total − allocation, 0)
Labor cost = regular × rate + overtime × rate × multiplier

Inputs explained

Parts in Batch: Parts covered by the labor estimate.
Crew-Hours on the Job: Setup and blasting crew-hours, people times elapsed hours.
Masking and Inspection per Part: Hands-on masking, unmasking and inspection minutes per part.
Loaded Regular Labor Rate: Direct regular-time cost per crew-hour.
Regular Crew-Hour Allocation: Crew-hours available at the regular loaded rate.
Overtime Cost Multiplier: Multiplier applied to the regular rate for overtime hours.

How to use the result

Best suited to quote labor build-up, actual labor variance, overtime avoidance.
Does not interpret labor law or union rules. Does not optimize crew size or shift pattern. Indirect supervision belongs in overhead unless directly charged.

Common questions

What is a crew-hour? One person working for one hour. Two people for eight elapsed hours equal sixteen crew-hours, which is why elapsed hours must not be priced directly.
Does the calculator decide legal overtime? No. Enter the regular-hour allocation and multiplier established by payroll, contract and company policy; the tool only prices the split you declare.
Where does supervision go? Include directly assigned supervision in the loaded rate or in overhead, but never in both places.
Why separate touch time? Per-part masking and inspection scale with batch size even when the setup and blasting crew stages do not, so they change the cost per part.

Last reviewed 2026-10-01.