RBT
Parts / Bill of Materials Cost Estimator
List parts, spare quantities, unit costs, shipping, already-owned inventory, and purchase notes.
What you'll need
Have these numbers handy.
text Season, team, or event name
number Students or participants
textarea Budget, materials, assignment, or packet notes - Use initials or role labels when names are not needed. Leave private student details out.
textarea Official links or rules to check - Paste links or reminders. Do not copy protected rule text into the tool.
Before you share
- Leave out private student, family, payment, tax, credential, medical, and emergency-contact details. Initials or labels work fine.
- Double-check rules, forms, fees, schedules, safety, and eligibility on the official program, school, and event pages.
- Your work saves in this browser when supported — download a backup for anything you'd hate to lose.
PNG, JPG, or WebP. Resized in this browser.
Total with contingency $0.00
SciPacketPrintable packet
Parts / BOM cost estimate
Build phase not set / Prepared by not set
| Part | Category | Buy | Owned offset | Line total | Priority |
|---|---|---|---|---|---|
| Part row 1 | Uncategorized | 0 | $0.00 | $0.00 | Needed |
| Category | Amount |
|---|---|
| Uncategorized | $0.00 |
Nothing to flag in these BOM rows.
What you get
What you can print or export.
- BOM cost table
- Already-have list
- Purchase priorities
- Shipping/tax notes
Print the packet, export a CSV, or download a backup file straight from the tool.
Example packet
Kickoff BOM purchase estimate example
A build lead estimates drivetrain, control, hardware, and bumper-fabric purchases while applying owned inventory and a 10% contingency.
- Total before contingency: $902.16
- Contingency: $90.22
- Total with contingency: $992.38
- Required cost: $752.40
- Owned inventory offset: $148.00
- Units to buy: 17
Assumptions
What this tool assumes.
- Part legality, safety, inspection, vendor, and school purchasing requirements must be checked outside SciPacket.
- Already-owned quantities reduce purchase quantities but do not confirm usable condition or rule compliance.
- Tax and shipping are planning estimates, not vendor quotes.
- Do not enter vendor account credentials, payment details, student data, or official rule text.
The math
How the numbers are figured.
- Purchase quantity = quantity needed - quantity already owned, clamped at zero.
- Line subtotal = purchase quantity times unit cost.
- Line total = line subtotal + shipping + estimated tax.
- Estimated tax = line subtotal times tax rate percent.
- Contingency amount = total before contingency times contingency percent.
- Total with contingency = total before contingency + contingency amount.
- Required cost sums rows whose priority includes `required`.
FAQ
Questions
FAQ
What does this BOM estimator do?
It estimates purchase quantities, owned-inventory offsets, shipping, tax, contingency, required cost, and category totals in your browser. You can print, export CSV, or download a backup file.
FAQ
Does this check whether a part is legal or safe?
No. Use official rules, inspection resources, safety guidance, mentor review, and vendor documentation outside SciPacket.
FAQ
What data should stay out of this estimator?
Do not enter vendor account credentials, payment details, banking information, tax IDs, student private data, or copied official rule text.
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