Paint Selection

Paint Coverage Calculator Guide: How Much Paint Do You Need?

How much paint do I need for HDB walls?

2 to 5 gallons is typical for HDB flats, depending on flat size and two coats. Estimate paint as total wall area divided by coverage per gallon, then multiply by coats. Budget paint covers 300-350 sqft per gallon, while premium paint covers 400-450 sqft per gallon. Add 10% extra.

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Paint coverage calculator guide for HDB Singapore by Pico X Health

The Basic Formula

Paint needed = (Total wall area ÷ Coverage per gallon) × Number of coats

Step 1: Calculate Wall Area

Wall area = Perimeter × Height - Doors & Windows

  • Standard door: 21 sq ft
  • Standard window: 15 sq ft

Step 2: Check Paint Coverage

  • Budget paint: 300-350 sqft/gallon
  • Mid-range: 350-400 sqft/gallon
  • Premium: 400-450 sqft/gallon

Step 3: Account for Coats

Most jobs need 2 coats. Add 3rd coat if changing from dark to light.

Quick Reference by Flat Type

  • 3-room HDB: 2-3 gallons
  • 4-room HDB: 3-4 gallons
  • 5-room HDB: 4-5 gallons

Pro Tip

Always buy 10% extra for touch-ups and future repairs.