建設
ペンキ、タイル、コンクリート、ソーラーパネルなどの建設計算。
5種類の計算機
建設
Cubic Yard Calculator
When ordering construction materials like concrete, mulch or gravel, volume is almost always measured in cubic yards. This calculator quickly converts your dimensions in feet to cubic yards.
Paint Calculator
Buying paint is expensive — too little and you have to make another trip, too much and you've wasted money. This calculator tells you exactly how many litres of paint you need based on the surface area, paint coverage, and number of coats.
Tile Calculator
Tile projects are vulnerable to breakage, cut loss and misplacement mistakes. This calculator not only computes how many tiles you need, but adds a waste margin automatically so you have enough if mistakes happen.
Concrete Calculator
Concrete projects require accurate volume calculation — too little results in incomplete work, too much means wasted money. This calculator computes exactly how much concrete you need and how many bags to order.
Solar Panel Calculator
To fully cover your daily electricity use with solar panels, you need enough panels to produce sufficient energy on an average day. Enter your daily use in kWh, the power per panel in Wp and the number of peak sun hours, and this calculator instantly works out how many panels and what system size you need. That gives you a realistic first estimate before requesting quotes.
Preparing a job well saves time, money and frustration. This category helps you work out exactly how much material you need: paint, tiles, concrete, laminate or the yield of solar panels.
Every construction calculator turns dimensions into concrete quantities, so you neither overbuy nor run out halfway.
Overview
The construction category includes a paint calculator, tile calculator, concrete calculator, laminate calculator and a solar-panel calculator.
How to use these calculators
- 1Pick the calculator for your material.
- 2Measure and enter the area or dimensions.
- 3Add a margin for cutting waste and reserve.
Common mistakes
- Forgetting cutting waste for tiles and laminate (add 5–10%).
- Not accounting for the number of paint coats.
- Confusing area units (m² vs. cm²).
Tips
- Buy a little extra material from the same batch for colour consistency.
- Note your measurements before heading to the DIY store.
よくある質問
How much extra material should I buy?
Typically add 5–10% for cutting waste and repairs.
Do the tools account for multiple coats?
Yes, the paint calculator asks for the number of coats.
Are the results accurate?
They give a reliable estimate; actual coverage varies by brand and surface.