METHOD
Formula and method
Rectangle: a×b. Triangle: a×h/2. Circle: πr².
Floor area calculator for rectangular, triangular and round rooms
Measure a rectangular, triangular or circular floor area.
01
Your inputs
Starting values are an example. Replace them with your own.
Your inputs stay in your browser.
02
Your result
Enter your details and run the calculation.
About this result
Informational calculations. Check assumptions, dates and jurisdiction before making a decision.
Full disclaimerHow do you calculate the area of a room?
For a rectangular room the calculator multiplies length by width, for a triangle it multiplies base by height and halves it, and for a circle it uses π times the radius squared. You enter lengths in metres or feet and get the result in both square metres and square feet. A 4 × 3.5 m room is 14 m². For an irregular room, split the plan into rectangles and triangles and add the results.
TRACEABLE
Sources and validity
Basic arithmetic or geometry using the formula shown. Uses only your inputs.
How we maintain data