# Flooring Calculator

> Free flooring calculator. Enter your room size to find out how many planks, boxes, and underlay you need for laminate, vinyl, or hardwood flooring.

Canonical: https://renoquant.com/flooring-calculator
Prices updated: 2026-03

## At a glance

A standard 20 m² room needs about 22 m² of flooring after 10% waste (15% for diagonal or many-cut layouts) plus the same area in underlay. Laminate and engineered wood always need underlay; vinyl (LVP/LVT) is fully waterproof and works in bathrooms and kitchens where laminate fails. European material costs run roughly EUR 10–40 per m² for laminate/vinyl and EUR 40–120 per m² for engineered or solid hardwood.

## How to Calculate How Much Flooring You Need

Whether you're installing laminate, vinyl, or hardwood flooring, knowing exactly how much material to buy saves money and prevents project delays. For wet areas like bathrooms and kitchens, our [tile calculator](/tile-calculator) may be a better fit.

### The Flooring Calculation Formula

**Flooring needed = Room Area × (1 + Waste Factor)**

Room area is simply: **Length × Width**. The waste factor accounts for cuts and fitting.

### Step-by-Step Guide

1. **Measure your room** — Record length and width at the widest points.
2. **Calculate area** — Multiply length × width.
3. **Add waste** — Typically 10% for rectangular rooms.
4. **Convert to boxes** — Divide total area by the coverage per box.

### Flooring Cost Comparison

| Type | Cost per m² | Durability | Water Resistance |
|------|------------|-----------|-----------------|
| Laminate | €15-35 | Good (15-25 years) | Low |
| Vinyl (LVP) | €20-45 | Very Good (20+ years) | Excellent |
| Engineered Wood | €30-60 | Excellent (25+ years) | Moderate |
| Solid Hardwood | €50-100+ | Excellent (50+ years) | Low |

### Don't Forget These Materials

- **Underlay** — Required for laminate and most click-lock flooring (consider adding [underfloor insulation](/insulation-calculator) at the same time for energy savings)
- **Transition strips** — For doorways and where flooring meets other surfaces
- **Skirting boards** — To cover the expansion gap around the perimeter
- **Expansion gap spacers** — Typically 8-10mm around all edges

### Tips for Accurate Estimates

- **Measure each section** of irregular rooms separately
- **Include closets and alcoves** in your measurements
- **Account for plank direction** — lengthwise makes rooms appear larger
- **Keep spare planks** — Store 2-3 extra for future repairs

### Choosing Between Laminate, Vinyl, Engineered, and Solid Wood

The four mainstream flooring families have very different sweet spots. Pick by room first, budget second:

| Flooring | Wet Areas (bath / kitchen) | Subfloor Heating | Refinishable | Sound (with underlay) | Lifespan |
|---------|----------------------------|------------------|---------------|----------------------|----------|
| Laminate | Avoid | Compatible (specific products) | No | Good | 15-25 years |
| Vinyl (LVP / LVT click) | Excellent | Excellent | No | Very good | 20+ years |
| Engineered wood | Limited | Compatible (most) | 1-2 times | Good | 25+ years |
| Solid hardwood | Avoid | Avoid (expansion) | 4-6 times | Moderate | 50+ years |
| Sheet vinyl | Excellent | Compatible | No | Excellent | 10-20 years |

Vinyl LVP has become the default for European bathrooms and kitchens because it tolerates standing water indefinitely, where laminate swells in 24-48 hours.

### Subfloor and Acclimation: The Hidden Steps

Most flooring failures (gaps opening, planks cupping, click joints failing) trace back to skipped subfloor prep or insufficient acclimation. Budget the time:

| Step | What it Involves | Time |
|------|------------------|------|
| Acclimate flooring to the room | Stack boxes flat in the room | 48-72 hours minimum (engineered/solid: 5-7 days) |
| Subfloor flatness check | Within 3 mm over 2 m straightedge | 30 min per room |
| Moisture check (concrete subfloor) | Calcium chloride or hygrometer test | 24-72 hr test |
| Damp-proof membrane | 1000-gauge polythene over concrete | Add 1 hour |
| Underlay | Roll out, butt joints, tape | 30 min per room |
| Expansion gap | 8-12 mm around all walls and pipes | Continuous |

Laying floor onto a freshly screeded subfloor that hasn't dried fully is the single most common cause of cupped or buckled flooring within the first year.

### Cost by Room Size

Material costs at typical European mid-range pricing, including underlay and a 10% waste factor. Installation costs are extra (€20-40/m² for a fitter):

| Room Size | Laminate | Vinyl LVP | Engineered Wood | Solid Hardwood |
|-----------|---------|-----------|------------------|----------------|
| Small (10 m², bedroom) | €170-385 | €220-495 | €330-660 | €550-1,100 |
| Medium (20 m², living room) | €330-770 | €440-990 | €660-1,320 | €1,100-2,200 |
| Large (35 m², open-plan) | €580-1,350 | €770-1,730 | €1,155-2,310 | €1,925-3,850 |
| Whole floor (75 m²) | €1,240-2,890 | €1,650-3,710 | €2,475-4,950 | €4,125-8,250 |

Add €15-30/m² for subfloor levelling compound if your existing floor isn't flat enough.

### Don't Forget These Materials

- **Underlay** — Required for laminate and most click-lock flooring (consider adding [underfloor insulation](/insulation-calculator) at the same time for energy savings)
- **Transition strips** — For doorways and where flooring meets other surfaces
- **Skirting boards** — To cover the expansion gap around the perimeter
- **Expansion gap spacers** — Typically 8-10mm around all edges
- **Damp-proof membrane** — Essential over concrete subfloors

### Common Mistakes to Avoid

- **Skipping acclimation** — Flooring laid before adjusting to room humidity will gap or cup within months.
- **No expansion gap** — Tight against the wall = buckling at the first temperature swing.
- **Wrong underlay** — Foam underlay under engineered wood reduces stability; use cork or rubber instead.
- **Laying over cracked tiles or uneven concrete** — Pressure points crack the floor above. Skim or remove first.
- **Not staggering joints** — Click planks staggered <30 cm look amateur and weaken the floor.

### When to Hire a Professional

Consider professional installation for rooms with subfloor issues, complex layouts, stairs, or when transitioning between different floor types. Professional installers ensure proper acclimation and expansion gaps. If you are renovating the full room, our [drywall calculator](/drywall-calculator) can help you estimate wall materials to complete the project.

## Frequently Asked Questions

### How much extra flooring should I buy?

We recommend purchasing 10% extra for standard rooms. If your room has many angles, alcoves, or you're installing diagonally, increase to 15%. Always keep a few spare planks for future repairs.

### Do I need underlay for laminate flooring?

Yes, underlay is essential for laminate and engineered wood flooring. It provides sound insulation, moisture protection, and cushioning. Some laminate comes with attached underlay.

### What's the difference between laminate and vinyl flooring?

Laminate is made from compressed wood fibers with a photo layer, making it harder but sensitive to moisture. Vinyl (LVP/LVT) is fully waterproof and softer underfoot, making it ideal for bathrooms and kitchens.

### How do I calculate flooring for an L-shaped room?

Divide the room into rectangles, calculate each separately, then add them together. Use our calculator for each section.

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Interactive version with calculator: https://renoquant.com/flooring-calculator. Figures are estimates; final quotes vary by site conditions, materials, and region.