What construction calculators are available here?
This category includes calculators for common construction and renovation tasks. The paint calculator estimates how much paint you need based on room dimensions, number of coats, and coverage rate. The loose-fill insulation calculator determines the number of bags of blown-in insulation required for a given area and depth, and calculates the resulting R-value for mineral wool, cellulose, or EPS materials.
How does the paint calculator work?
The paint calculator takes your room's length, width, and height to compute the total wall area. It then divides that area (multiplied by the number of coats) by the paint's coverage rate to give you the total liters needed. Typical coverage is 10–12 m² per liter for one coat, though this varies with paint type and surface texture.
How do I calculate insulation for my attic or walls?
The insulation calculator uses the area you want to cover, the target depth, and the bag coverage at a reference depth to determine how many bags you need. It also computes the thermal resistance (R-value) based on the material's conductivity coefficient. Higher R-values mean better insulation — Northern European building codes typically require R-7 to R-10 for attic floors.
What materials can I calculate insulation for?
The insulation calculator supports three common loose-fill materials: mineral wool (rock wool or glass wool, λ ≈ 0.036), cellulose (recycled paper fiber, λ ≈ 0.040), and EPS beads (expanded polystyrene, λ ≈ 0.035). Each has different thermal performance, settling characteristics, and fire resistance properties.
When should I use construction calculators?
Use these calculators when planning any renovation or building project. They help you purchase the right amount of materials — avoiding waste from overbuying or delays from underbuying. Whether you are painting a single room or insulating an entire attic, accurate estimates save time and money.