Product tour

The whole tool, top to bottom.

One spreadsheet primitive across every data-bearing screen. Same editing, paste, undo, and Excel interop everywhere. Here’s what that gets you.

01 / Estimating sheets

The structured spreadsheet surface for day-to-day estimating — formulas, paste, undo, copy/paste, and typed cost columns.

Full formula engine with cross-sheet references, ranges, and the standard arithmetic / aggregate / lookup function set
Multi-sheet workbooks with section rows, sub-rows, and 19 typed columns per sheet
Excel paste-in with type coercion and formula stripping; resolved-value export is part of the beta gate
Undo / redo stack with Ctrl+Z / Ctrl+Y plus auto-save with optimistic locking

app.costable.com / Riverside Stage 2 / Slab + frame

G6= qty * unit_cost * (1 + markup)

	Description	Qty	Unit cost	Total
Slab + footings
1	Concrete N32 — 100mm	42.0 m³	$285.00	$13,765.50
2	Reinforcement mesh SL82	186 m²	$22.40	$4,791.46
Frame + cladding
3	Studs 90×35 MGP10 KD	312 lm	$8.95	$3,210.66
4	Carpenter labour	142 hr	$95.00	$16,188.00
Estimate total				$37,955.62

02 / Cost library

Categorised cost items with sub-categories, units, suppliers, supplier refs, and ERP item codes
Stale-cost detection when library prices change after an estimate references them
Per-estimate cost overrides with reason notes — clear audit trail
Bulk import / template export for migrating from existing Excel libraries

app.costable.com / cost library

Ref	Description	Unit cost	Supplier
CL-204	Concrete N32 — 100mm slab on grade	$285.00	Boral
CL-211	Reinforcement mesh SL82 — 6m × 2.4m	$22.40	OneSteel
CL-302	Studs 90×35 MGP10 KD — 2.4m	$8.95	Bunnings Trade
CL-308	Plywood bracing 7mm — 2.4 × 1.2m	$54.00	Tilling
CL-410	Carpenter — chargeable hour	$95.00	(labour)

03 / Variables

Four-scope resolution chain matches the way real estimating works (org defaults → project tweaks → estimate overrides → part instance)
Bare-name and forced-global (`~name`) lookups in any formula
Per-item version history on globals; rename-with-refs cascades atomically
Override grid for fast project / estimate-level tweaks across the whole variable set

app.costable.com / Variables

B4= rate_carpenter * 1.15

04 / Parts

Personal parts for individual estimators or org-wide parts for shared catalogues
Per-instance variable values let one part flex across estimates without forking
Nested parts with cycle detection — build sub-assemblies once, reuse everywhere
Forced-claim flow when a sample part is inserted into a real estimate

app.costable.com / parts library

Ref	Name	Rows
PT-101	Concrete slab on grade — standard	8
PT-104	Timber frame — single storey	22
PT-110	Bathroom rough-in + finish	18
PT-120	Pontoon — 12m × 3m	31
PT-205	Roof truss + insulation	14

05 / Onboarding

Auto-seeded sample project + estimate + cost library + variables matched to your country
Five inline ambient prompts on key surfaces — dismissable, never blocking
One-click Remove sample data once you've made your first real save
Locale defaults (currency, GST, unit system, markup vs margin) editable from Settings

app.costable.com / projects

Welcome! This is sample data to explore. Open the sample project to see how it fits together.AU bundle

Project	Customer	Status	Total
Riverside Stage 2 (sample)	Riverside Apartments Ltd	Quoting	$86,660.00