Getting the measurements right is the difference between a room that works and furniture you regret. These free calculators use the same sizing rules our guides are built on: standard placement clearances, industry viewing-angle standards, and ENERGY STAR guidelines. No sign-up, no tracking, just the math.
Room Calculators
Rug Size Calculator — Enter your room and sofa, table, or bed size to find the right rug dimensions for living rooms, dining rooms, and bedrooms. Pairs with our rug size guide.
Ceiling Fan Size Calculator — Room dimensions and ceiling height in, correct blade span and mount type out, following ENERGY STAR guidelines and the 7-foot blade-clearance safety rule.
Furniture & Electronics Calculators
TV Size Calculator — Enter your viewing distance to get the ideal TV screen size range, based on the SMPTE 30-degree and THX 36-degree viewing-angle standards. Works with our couch-to-TV distance guide.
How our calculators work
Every calculator on this page encodes a published, checkable rule — not a guess. Rug placement follows the 6-to-8-inch extension and 24-inch chair-pullout standards. TV sizing uses the SMPTE and THX viewing-angle formulas. Ceiling fan sizing follows ENERGY STAR room-area brackets. Where a rule has a range, we show you the range and explain the trade-off, so you can decide for your own room.
More tools are on the way, each paired with a full measurement guide. If there is a sizing decision you keep second-guessing, tell us — reader requests shape what we build next.