Abrasive Blasting, Shot Peening & Surface Prep calculator
Blast Coverage Completion Rate Calculator
This calculator helps a foreman or production manager compare cleaned square footage against the job's planned blast area. Use it during a shift update to see whether the crew is on pace for surface prep release, coating handoff, or customer progress reporting.
What this calculator does
- Calculate the percent of planned surface area already blasted or ready for coating inspection.
- a blasting crew needs a quick percent-complete number from measured square footage instead of a rough visual guess
- Shows how much of the planned surface prep scope is complete as a percentage.
Formula used
- Coverage completion = blasted area completed รท total planned blast area
- Gap to target = target completion - coverage completion
Inputs explained
- Blasted area completed: Use inspected area that meets cleanliness and profile requirements.
- Total planned blast area: Include all surfaces in the same scope and measurement basis.
- Target completion: Milestone target for the shift, day, or coating handoff.
How to use the result
- Use it for shift handoffs, coating release meetings, and daily production reports.
- It does not judge cleanliness, chloride level, dust rating, or profile; only count square footage that has passed your inspection gate.
Common questions
- Is this the same as square feet per hour? No. This page reports percent of planned area completed. Use blast room throughput when you need a production rate in square feet per hour.
- Should rejected area count as completed? No. Only include area that is accepted for the next operation or coating window.
- What if the scope changes? Update the total planned blast area. A scope addition can lower the completion percent even when the crew made progress.
- How does the target help? The gap to target tells you whether to add labor, extend the shift, or adjust the coating schedule.
Last reviewed 2026-05-12.