Area calculator (m²)
Area and perimeter of a room, a garden or a wall, plus paint needed.
How it works
Area = length × width. Perimeter = 2 × (length + width). Paint = area × coats / coverage.
Results are for guidance only and do not replace professional advice.
Worked example
With the default values:
- Length (m)4.2
- Width (m)3.5
- Paint coverage (m²/L)10
- Coats2
you get:
- Area14.7 m²
- Perimeter15.4 m
- Paint needed2.9 L
Frequently asked questions
How does the “Area calculator” tool work?
Area = length × width. Perimeter = 2 × (length + width). Paint = area × coats / coverage.
What do I need to enter?
Just fill in: length, width, paint coverage, coats. The result updates as you type.
Can you give an example?
Length (m): 4.2; Width (m): 3.5; Paint coverage (m²/L): 10; Coats: 2 → Area: 14.7 m²; Perimeter: 15.4 m.
Is this calculator free, and is my data private?
Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.