🇹🇴 Tonga · Paint · Updated 2026
How much paint do you need to build a house in Tonga?
A 150 m² single-storey house in Tonga needs roughly 94 litres of paint — about 0.63 litres per m² of floor area. That is computed from Tonga construction conventions, including the local wastage allowance.
Paint quantities for a house in Tonga, computed from how buildings are actually put up here rather than from a global average. The tables below run from a small 50 m² dwelling to a 400 m² family home, and the method section shows how to reproduce every figure by hand so you can adapt it to your own plan.
Paint by house size in Tonga
| Floor area | Paint required | Per m² of floor |
|---|---|---|
| 50 m² | 54 litres | 1.08 |
| 75 m² | 67 litres | 0.89 |
| 100 m² | 77 litres | 0.77 |
| 150 m² | 94 litres | 0.63 |
| 200 m² | 109 litres | 0.55 |
| 250 m² | 122 litres | 0.49 |
| 300 m² | 133 litres | 0.44 |
| 400 m² | 154 litres | 0.39 |
Single-storey. The per-m² rate falls as the house grows — a small house has more wall and roof per square metre of floor than a large one, which is why these are computed size by size rather than scaled from a single rate.
Where it goes — 150 m² house
Paint Two coats at 10 m² per litre per coat | 94 litres |
Plaster / render area External face plus both faces of internal walls | 471.8 m² |
What drives the quantity in Tonga
| Factor | Local value | Effect |
|---|---|---|
| Paintable area | External face + both internal faces | Internal walls are painted on both sides, which is why the paint area far exceeds the floor area. |
| Coats | 2 (plus primer) | Two finish coats is the practical minimum over new plaster; a primer or sealer coat is additional. |
| Coverage | ~10 m²/litre/coat | On smooth plaster. Rough render and unsealed masonry can halve it. |
| Substrate | 12 mm plaster internally | A properly floated plaster surface uses far less paint than a rough one — the saving is in the plastering, not the paint. |
How to calculate it yourself
- 01
Measure wall areas: external face once, internal walls on both faces, plus ceilings.
- 02
Deduct doors and windows only if they total more than about 10% of the wall — below that the deduction is inside the error of the estimate.
- 03
Divide by the coverage rate on the tin, then multiply by the number of coats.
- 04
Add a sealer or primer coat separately — its coverage is usually lower than the finish coat's.
- 05
Round up to whole tins, in the largest size available, which is materially cheaper per litre.
Buying and site notes
- —New plaster needs to dry fully before painting — weeks, not days. Paint applied over damp plaster blisters and peels.
- —Buy one batch per colour for the whole house; batch-to-batch colour variation is visible on a long wall.
- —Exterior grade on exterior walls, without exception. Interior paint outdoors fails within one wet season.
Get every material measured off your own plan
This page works from a representative footprint. Upload your dimensioned drawings and get the full schedule — every material, measured from your real geometry and priced in TOP (T$).
Take off my drawingsPaint in Tonga — frequently asked
How much paint does a house need in Tonga?
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A 150 m² single-storey house in Tonga needs roughly 94 litres of paint — about 0.63 litres per m² of floor area. That is computed from Tonga construction conventions, including the local wastage allowance.
How much paint per square metre in Tonga?
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About 0.63 litres per m² of floor area for a single-storey house. The figure is not linear across sizes — a small house has proportionally more wall and roof per m² of floor than a large one, which is why the table above is computed size by size rather than scaled from one rate.
What changes the quantity of paint needed?
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Paintable area (External face + both internal faces) — Internal walls are painted on both sides, which is why the paint area far exceeds the floor area. Coats (2 (plus primer)) — Two finish coats is the practical minimum over new plaster; a primer or sealer coat is additional. Coverage (~10 m²/litre/coat) — On smooth plaster. Rough render and unsealed masonry can halve it.
Is wastage included?
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Where it applies, yes — a 5% allowance is carried on the perishable materials (walling units, tiles, paint). Bulk materials like sand and stone carry handling loss instead. Ordering the theoretical quantity with no allowance reliably means a second delivery at a worse price.
How accurate is this for my own house?
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It is a planning quantity derived from a representative rectangular footprint, so it is the right order of magnitude and internally consistent — good for budgeting and for checking a supplier's list. It is not a measured takeoff of your plan. Upload your dimensioned drawings to get quantities measured off your real geometry and priced in TOP.
Are paint prices included?
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No, deliberately. Material prices in Tonga move week to week and vary by region, so a price printed on a static page would be wrong within a month. This page gives you the quantity — take that to two or three local suppliers and the price will be current and competitive.