Home & Construction · Real‑time Tools

Build Smarter
Estimate & Save

Paint, tiles, flooring, area, volume, concrete, wallpaper, electricity, BTU. All in real time, no buttons.

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Paint needed
liters (assuming 10 m²/L coverage)

🎨 Paint Calculator

Estimate paint for walls (excluding ceiling). Wall area = 2 × height × (length+width). 1 liter covers ~10 m². Add 10% for waste.

💡 Subtract doors/windows area for accuracy.
🎨
Number of tiles
including waste

🔲 Tile Calculator

Calculate how many tiles needed for a floor. Each tile area = length×width (converted to m²). Add waste for cuts and breakage.

💡 Always buy 5‑10% extra tiles.
🔲
Number of planks
incl. 10% waste

🪵 Flooring Calculator

Estimate how many planks or boards needed for a rectangular floor. Total area / plank area + 10% waste.

💡 Consider installation pattern (diagonal requires more).
🪵
Floor area
square meters (m²)

📏 Room Area Calculator

Calculate floor area of a rectangle. Length × width. Essential for flooring, tiles, or rugs. For irregular shapes, divide into rectangles.

💡 Measure in meters for easy conversion.
📏
Volume
cubic meters (m³)

🧊 Volume Calculator

Calculate volume of a rectangular space (length×width×height). Useful for concrete, air conditioning, or storage capacity.

💡 For cylinders or complex shapes, use specialized formulas.
🧊
Concrete volume
cubic meters (m³) ~ tonnes

🧱 Concrete Calculator

Volume needed for a slab or footing. Length × width × depth. Add 10% for waste and uneven ground. One m³ ≈ 2.4 tonnes.

💡 Order slightly more to avoid shortages.
🧱
Number of rolls
recommended (including waste)

🖼️ Wallpaper Calculator

Estimate rolls needed for a wall. Wall area / (roll width × roll length). Add 10‑15% for pattern matching.

💡 Check pattern repeat for more accurate waste.
🖼️
Daily cost
Monthly cost: —

⚡ Electricity Consumption

Estimate cost of running an appliance. kWh = watts × hours / 1000. Multiply by price to get cost.

💡 Use sleep mode or timers to save energy.
Recommended BTU/h
for cooling capacity

❄️ BTU Calculator for Room

Estimate cooling capacity needed. Base: 600 BTU per m². Multiply by height factor and sun exposure.

💡 For rooms with many electronics or people, add 10-20%.
❄️
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Frequently asked questions about home & construction tools

📌 How much paint do I need for one room?+
Calculate wall area (perimeter × height) and divide by paint coverage (usually 10 m²/L). Add 10% for waste.
📈 What is the standard tile waste percentage?+
For straight layouts, 5‑10%. For diagonal or complex patterns, 15‑20%.
🏠 How do I calculate concrete for a slab?+
Measure length, width, thickness in meters. Multiply to get m³. Add 10% for uneven ground.
🛒 What BTU do I need for a 20 m² room?+
Roughly 20 × 600 = 12,000 BTU. Adjust for ceiling height and sun exposure using our calculator.
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