Pinpoint. Duct sizing charts & design guides

Design a complete duct system in minutes.

Free sizing charts and field-tested guides — the same rules of thumb a contractor uses on every job, distilled into plain steps.

Read the Duct Guide The App — Coming Soon

15 years of field experience · No sign-up · No sales pitch

How it works

One job, six tabs — the calculator walks the design in the order you'd build it.

1

Job

Customer and company details, crawlspace or attic — set once, printed on every proposal.

2

Rooms

Room-by-room airflow with live recalculation, one-tap house presets, and a diagnostic that flags rooms your existing ducts are starving.

3

Supply

Drag-and-drop trunk designer. Back-pressure sizing, fitting warnings, and per-stick overrides when you want them.

4

Returns

Return layout with noise warnings and airflow balance checks, mixing boxes and grill sizing figured for you.

5

Materials

The takeoff builds itself — taps, boots, grills, trunk, end caps — with editable pricing and a copy-ready supply-house order.

6

Export

A printable customer proposal with Good / Better / Best tiers, a subcontractor sheet with the trunk diagrams, and full job backup & restore.

Coming Soon

Pinpoint Duct Calculator

The app that does all of this automatically. Everything in this guide, in your pocket, on the job site:

  • Room-by-room sizing with live recalculation — plus one-tap house presets: Ranch, Two-Story, Starter, Split-Level
  • Pro mode — rule-of-thumb load adjustments for insulation, exterior walls, duct location, infiltration, and occupancy
  • Visual trunk designer — drag-and-drop supply layout with back-pressure auto-sizing
  • Returns designer with noise warnings
  • Existing Duct Diagnostic — flags the rooms your current ducts are starving
  • Materials takeoff with editable pricing, a copy-ready supply-house order, and CSV export
  • Customer Proposal with Good/Better/Best tiers — printable, with your company branding
  • Subcontractor Sheet with supply and return trunk diagrams
  • Backup & Restore for your jobs, undo/redo, dark mode, and a metric/imperial toggle
  • The full Duct Guide built in as a tab, plus reference charts up to 30″
  • One self-contained file — works fully offline, no install, no account

One email when it launches. No spam, no list-selling, ever.