10 answers
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Direct answers to every common question in this cluster. Each page has the computed value, the formula, and a live converter.
Quick reference
Most interior wall paint covers ~10 m² per litre per coat. Two coats are standard for proper opacity and durability — so a 20 m² room needs about 4 L total. Round up to the next can size; leftover paint is better than running short mid-job.
Formula
litres needed = (m² × coats) ÷ coverage_per_litre
Every answer in this topic
- How much paint do I need for a 10 m² room?
- How much paint do I need for a 100 m² room?
- How much paint do I need for a 120 m² room?
- How much paint do I need for a 15 m² room?
- How much paint do I need for a 20 m² room?
- How much paint do I need for a 25 m² room?
- How much paint do I need for a 30 m² room?
- How much paint do I need for a 40 m² room?
- How much paint do I need for a 50 m² room?
- How much paint do I need for a 75 m² room?