Why use accepted area?

Only accepted output fulfills the job requirement. Dividing by gross area hides the cost of rework and first-pass losses. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.

Is overhead the same as profit?

No. Overhead allocates business cost; profit or margin is added in the quote-margin calculator. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.

Where does masking labor go?

Include it in direct labor or masking cost, but not both. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.

Can this compare contractors?

Yes, when scope, acceptance, inclusions, and cost definitions are normalized. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.

What belongs in all non-labor direct cost?

Include costs caused directly by the job other than labor: abrasive consumption, compressor energy, equipment allocation, masking materials, waste handling, disposal, rentals and direct consumables. Do not include profit. Avoid mixing overhead into this field because the streamlined model already applies its disclosed overhead assumption.

Why is first-pass yield fixed?

The page is intended to produce a fast four-input planning result. A fixed, visible yield basis keeps rejected or repeated work from disappearing while avoiding another field. If the job has validated yield that differs materially, move to a detailed estimate or adjust the result explicitly and document the changed basis.

Abrasive Blasting, Shot Peening & Surface Prep calculator

Abrasive Blast Cost per Accepted Square Foot Calculator

Calculate a defensible blast cost per accepted square foot without forcing an estimator through eleven separate cost boxes. Enter direct labor hours, loaded labor rate, one combined non-labor direct-cost figure and gross job area. The model applies a documented overhead rate and first-pass-yield assumption, then reports total job cost, accepted area, labor cost and cost per accepted square foot. Combine media, power, equipment, masking, disposal and other direct charges consistently in the third field. The short form is designed for rapid quoting; the Method sheet records exactly which factors are fixed so reviewers can identify when a detailed estimate is required.

What this calculator does

Divide a transparent full job-cost stack by first-pass accepted area rather than gross area or a generic weighted-cost preset.
Use it for job-cost estimate, actual-versus-quote review, make-or-buy comparison, producing an early budgetary rate before a full routing and detailed estimate exist..
Divide a transparent full job-cost stack by first-pass accepted area rather than gross area or a generic weighted-cost preset.

Formula used

Accepted-area cost = labor plus entered non-labor direct cost and fixed overhead, divided by yield-adjusted area.
Fixed secondary assumptions compiled into this release: Media cost: 0 $; Energy cost: 0 $; Equipment cost: 0 $; Masking and protection cost: 0 $; Waste and disposal cost: 0 $; Overhead applied to direct cost: 15 %; First-pass accepted area: 92 %.

Inputs explained

Direct labor hours: All direct crew-hours charged to the blasting work package.
Loaded labor rate: Wage, burden, and directly applicable labor cost per crew-hour.
All non-labor direct cost: Combined media, energy, equipment, masking, disposal and other direct cost for this job.
Gross blasted area: Total work area before first-pass acceptance adjustment.

How to use the result

Best suited to job-cost estimate, actual-versus-quote review, make-or-buy comparison, producing an early budgetary rate before a full routing and detailed estimate exist..
The four-input result is conditional on the disclosed fixed assumptions; use a detailed engineering model when they are not representative. Not a selling-price or margin calculator. Taxes, escalation, financing, and contingency are excluded unless entered as direct costs. Accounting treatment must match company policy. Escalation, profit, contingency, tax, financing and unusual job risk are outside this cost calculation.

Common questions

Why use accepted area? Only accepted output fulfills the job requirement. Dividing by gross area hides the cost of rework and first-pass losses. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.
Is overhead the same as profit? No. Overhead allocates business cost; profit or margin is added in the quote-margin calculator. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.
Where does masking labor go? Include it in direct labor or masking cost, but not both. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.
Can this compare contractors? Yes, when scope, acceptance, inclusions, and cost definitions are normalized. The fixed secondary assumptions are listed on this page and in the downloadable workbook so the four-input result remains auditable.
What belongs in all non-labor direct cost? Include costs caused directly by the job other than labor: abrasive consumption, compressor energy, equipment allocation, masking materials, waste handling, disposal, rentals and direct consumables. Do not include profit. Avoid mixing overhead into this field because the streamlined model already applies its disclosed overhead assumption.

Last reviewed 2026-08-24.