The instrument drawer
Seven small calculators that answer one furnishing question each — free, no sign-up, and every one of them shows its arithmetic and names the source. The same research-verified figures Poché draws on your floor plan.
Room size and the sofa, table or bed in it — returns the standard rug size from 3 × 5 to 9 × 12, the reveal it leaves, and the rule that picked it.
Wall run in, sofa width band out — with the end tables and the walkway subtracted, and the standard sizes that land in it named.
Honest seat counts from the 24-inch-per-diner rule, plus the room size the table needs once every chair pulls back 36 inches.
Screen size in, seating distance out — or the reverse. THX immersion, the ITU acuity floor, real panel widths, and the mounting-height angle.
Opening width and wall height in — usable rod, the double-hang verdict, the drop each garment needs, and what the doors quietly cost you.
Room size and bed size in — the real walk-around clearances with the frame counted, the dresser wall checked, and the largest bed the room wants.
Depth, height, doorway — one honest verdict: clears flat, tilt territory, or not without disassembly.
Every calculator here runs on the same figures as the field guides and the app's own furniture library — researched against Architectural Graphic Standards, Time-Saver Standards, NKBA, the IRC and the ADA, with each number tiered as code, standard or convention. Where a figure is a styling convention rather than a published standard, the tool says so on screen rather than dressing it up. Where nobody publishes a number at all — hanger spacing, how high a TV goes above a fireplace — it says that too.
That is the whole house rule: assert the geometry, label the judgement. A calculator that returns a confident wrong number is worse than no calculator, because you cannot tell which one you got.
These tools answer a question at a time. The app answers all of them at once — upload the floor plan you already have, set the scale in seconds, and place real furniture at true scale with the clearances drawn.
Open the app →