Square Footage Calculator

Calculate rectangular area in square feet from length, width and the count of identical spaces, with guidance for irregular rooms and waste. Calculate it clearly with Figur.

Measure one rectangle or several identical spaces

Area in square feet = length in feet × width in feet × number of same-size areas. The count repeats the same rectangle; it is not a way to enter differently sized rooms. Split an L-shaped floor into non-overlapping rectangles, calculate each separately and add the areas. For feet and inches, convert inches to feet by dividing by 12 before entering a dimension.

Method and assumptions

Area = length × width × count of identical rectangles. Both dimensions must be in feet; the result is square feet.

  • Each counted space has the same rectangular dimensions; the count is a whole number of at least one.
  • No waste, openings, overlap, material coverage or package rounding is added or deducted.
  • This reports area, not cubic volume, material cost, structural suitability or an automatic unit conversion.

Planning takeoff, not a binding bid, structural design or engineering advice. Confirm field measurements, product coverage, installation requirements and supplier quantities before buying.

Sources and references

The result uses your inputs and the tool's documented assumptions; it does not fetch current prices, rates or products.

Worked example

Measure two identical rectangular rooms, each 12 × 15 ft.

12 × 15 × 2 = 360 sq ft of measured area, before any waste allowance or package rounding.

Frequently asked questions

Can I combine rooms of different sizes?

Calculate each size separately and sum their areas. The quantity field repeats the entered dimensions for identical spaces only.

How do I enter 12 feet 6 inches?

Enter 12.5 feet: 12 + 6 ÷ 12. Do not enter 12.6 as if the decimal were inches.

Does this tell me how much flooring to buy?

It gives measured area only. Add the material's waste allowance and round to the supplier's package coverage separately.

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