Quick answer: Good emulsion paint covers about 10 m² per litre per coat on smooth, sealed walls. Most walls need two coats, so allow 1 litre for every 5 m² of wall. A single bedroom needs about 11–12 litres in total, a 2-bedroom apartment 45–55 litres and a 3-bedroom house 60–90 litres, which is three to five 20-litre buckets.
Buying too little paint means extra trips to the hardware store and colour that doesn’t match between batches. Buying too much wastes money. Here is how professional painters in Kenya estimate paint quantities.
Step 1: Measure the area to be painted
- Walls: add up the length of every wall in the room and multiply by the height. A 4 m × 4 m room has 16 m of wall; with a 2.8 m ceiling that is 44.8 m².
- Subtract openings: take off about 1.8 m² for each door and the actual size of each large window.
- Ceiling: multiply the room’s length by its width (4 × 4 = 16 m²).
- Add up every room that will be painted the same colour.
Step 2: Use the formula
Litres needed = area (m²) × number of coats ÷ spread rate (m² per litre)
Use these spread rates as a guide. Always check the figure printed on the tin, because premium paints often cover more.
| Paint type | Typical spread rate per coat |
|---|---|
| Vinyl matt / silk emulsion (interior) | 10 – 12 m² per litre |
| Economy / contract emulsion | 8 – 10 m² per litre |
| Exterior weatherproof emulsion | 8 – 10 m² per litre |
| Undercoat / sealer on new plaster | 8 – 10 m² per litre |
| Gloss or enamel (doors, metal) | 12 – 16 m² per litre |
| Textured coating | 1 – 2 m² per kg (varies by texture) |
Paint needed per room
These figures assume a 2.8 m ceiling and two coats of emulsion at 10 m² per litre.
| Room | Walls + ceiling (approx.) | Paint for 2 coats |
|---|---|---|
| Small bedroom (3 × 3 m) | 40 m² | 8 litres |
| Standard bedroom (4 × 4 m) | 57 m² | 11 – 12 litres |
| Master bedroom (5 × 4 m) | 67 m² | 13 – 14 litres |
| Living and dining room (6 × 5 m) | 85 – 95 m² | 17 – 19 litres |
| Kitchen (3 × 3.5 m, with cabinets) | 30 – 35 m² | 6 – 7 litres |
| Bathroom (2 × 2.5 m, part tiled) | 15 – 20 m² | 3 – 4 litres |
Paint needed per house
| Property (interior) | Area to paint | Litres (2 coats) | 20-litre buckets |
|---|---|---|---|
| Bedsitter / studio | 90 – 120 m² | 18 – 24 L | 1 – 2 |
| 1-bedroom apartment | 140 – 180 m² | 28 – 36 L | 2 |
| 2-bedroom apartment | 220 – 270 m² | 45 – 55 L | 2 – 3 |
| 3-bedroom house | 300 – 450 m² | 60 – 90 L | 3 – 5 |
| 4-bedroom maisonette | 450 – 600 m² | 90 – 120 L | 5 – 6 |
Ceilings are often painted white while walls get a colour, so split your total between the two colours. For a full cost estimate, see our guide to the cost of painting a 3-bedroom house in Kenya.
How much exterior paint do I need?
Measure the perimeter of the house and multiply by the height to the eaves. For a gable wall, add half the width × the height of the triangle. A single-storey 3-bedroom bungalow usually has 180–260 m² of exterior wall, which needs 40–60 litres of exterior emulsion for two coats. Rough plaster, stone dash and very porous walls can use 30% more. A perimeter wall needs paint on both sides, plus the top.
For which product to use, read our guide to the best paint for exterior walls in Kenya.
When you need more paint than the formula says
- New plaster: it soaks up paint. Apply a sealer or diluted first coat, then two full coats.
- Big colour changes: going from dark red to white, or from white to a deep colour, often needs a third coat.
- Rough or textured walls: they have more surface area than flat walls.
- Spraying: airless spraying is fast but wastes 10–20% more paint than rolling, especially outdoors in wind.
- Watered-down paint: thinning paint beyond the label’s instructions “stretches” it but needs more coats and fades faster. It is one of the most common shortcuts on cheap jobs.
Tips for buying paint in Kenya
- Buy all the paint for one colour in a single order, so the tint matches.
- 20-litre buckets are much cheaper per litre than 4-litre tins.
- Keep the receipt and colour code for future touch-ups.
- Store leftover paint sealed, off the floor and away from sun.
Not sure about your measurements? Book a free site visit. Our painters will measure every room and give you an exact paint list with an itemised quote. You can see current rates on our painting rates per m² page.
