# Bathroom Renovation Calculator

> Free bathroom calculator. Estimate tiles, waterproofing, grout, adhesive, and fixture costs for your bathroom renovation instantly.

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

## At a glance

A standard 6 m² European bathroom uses around 165 floor tiles (20×20 cm) and 160 wall tiles (25×33 cm) with half-wall tiling at 1.2 m, plus mandatory waterproofing on the shower zone floor and walls to 1.8 m height. Materials alone cost EUR 500–1,200; with professional installation, full renovations land at EUR 1,500–3,000 budget, EUR 3,000–6,000 mid-range, and EUR 6,000–12,000+ luxury. DIY timelines are 3–5 days for a small bathroom, 5–8 days for a medium one.

## How to Calculate Materials for a Bathroom Renovation

A bathroom renovation involves multiple materials — tiles, adhesive, grout, waterproofing, and fixtures. Getting the quantities right avoids costly delays and emergency trips to the tile shop. Our bathroom calculator handles all the maths so you can focus on design choices.

### Bathroom Tiling Reference

| Surface | Tile Size | Coverage per Tile | Tiles per sqm (inc. 3mm grout) |
|---------|----------|-------------------|-------------------------------|
| Floor | 20x20 cm | 0.04 sqm | 25 tiles |
| Floor | 30x30 cm | 0.09 sqm | 11 tiles |
| Wall | 25x33 cm | 0.0825 sqm | 12 tiles |
| Wall | 20x25 cm | 0.05 sqm | 20 tiles |
| Mosaic sheet | 30x30 cm (sheet) | 0.09 sqm | 11 sheets |

Smaller floor tiles create more grout lines, which improves grip on wet surfaces. This is why 20x20cm remains the standard for bathroom floors, especially in walk-in showers where the floor must slope to a drain.

### Materials Breakdown per sqm

| Material | Quantity per sqm | Unit | Cost per Unit |
|----------|-----------------|------|---------------|
| Floor tiles (20x20cm) | 25 tiles | tile | EUR 1.20 each |
| Wall tiles (25x33cm) | 12 tiles | tile | EUR 2.10 each |
| Tile adhesive | 3 kg | kg | EUR 0.48/kg |
| Grout | 0.5 kg | kg | EUR 8/kg |
| Waterproofing membrane | 1 sqm (wet areas) | sqm | EUR 15/sqm |
| Waterproofing liquid | 0.5 L (wet areas) | L | EUR 5/L |

These rates are for standard bathroom products. Premium tiles, rapid-set adhesive, and anti-mould grout cost 20-50% more but offer better durability in high-moisture environments.

### Fixture Installation Costs

Every bathroom needs fixtures. Whether you install them yourself or hire a bathroom fitter, budget for these:

| Fixture | Supply Cost | Installation Cost | Total Installed |
|---------|-----------|------------------|----------------|
| Toilet | EUR 100-400 | EUR 120 | EUR 220-520 |
| Basin + vanity | EUR 80-350 | EUR 120 | EUR 200-470 |
| Shower enclosure | EUR 150-600 | EUR 120-240 | EUR 270-840 |
| Bath | EUR 120-800 | EUR 120-240 | EUR 240-1040 |
| Heated towel rail | EUR 50-200 | EUR 120 | EUR 170-320 |

### Waterproofing Requirements

Building regulations require tanking in all wet areas. The minimum waterproofed zone covers the shower floor and walls to 1.8m height. For a full wet room, the entire floor and all walls need tanking.

Apply waterproofing membrane in two coats with 24 hours drying between coats. Overlap joints by 50mm and embed reinforcing tape in the first coat at all internal corners. Once waterproofed, the surface is ready for tiling with flexible adhesive.

### Budget Comparison

| Budget Level | Tiles | Fixtures | Labour | Total (6 sqm bathroom) |
|-------------|-------|----------|--------|----------------------|
| Budget | EUR 200-400 | EUR 300-600 | EUR 800-1200 | EUR 1500-2500 |
| Mid-range | EUR 400-800 | EUR 600-1200 | EUR 1200-2000 | EUR 3000-5000 |
| Luxury | EUR 800-2000 | EUR 1200-3000 | EUR 2000-4000 | EUR 6000-12000 |

The biggest cost variable is the fixtures. A budget toilet and basin set costs EUR 200, while a premium wall-hung suite starts at EUR 800. Tiles are the next variable — porcelain at EUR 20/sqm vs natural stone at EUR 80/sqm makes a significant difference on 18+ sqm of tiled surface.

If you are renovating the kitchen at the same time, our [kitchen renovation calculator](/kitchen-renovation-calculator) helps you estimate backsplash tiles, cabinet paint, and countertop materials. For the rest of the house, check the [paint calculator](/paint-calculator) to estimate wall paint and the [tile calculator](/tile-calculator) for other tiling projects.

## Frequently Asked Questions

### How many tiles do I need for a bathroom?

It depends on your floor area and how high you tile the walls. For a standard 3x2m bathroom with half-wall tiling (1.2m), you need approximately 165 floor tiles (20x20cm) and 160 wall tiles (25x33cm), including 10% waste. Use our calculator for exact numbers.

### How much does a bathroom renovation cost?

Materials alone for a standard bathroom (6 sqm) cost EUR 500-1200 depending on tile quality and fixtures. Professional installation adds 50-100% on top. A full budget bathroom renovation runs EUR 1500-3000, mid-range EUR 3000-6000, and luxury EUR 6000-12000+.

### Do I need waterproofing in a bathroom?

Yes. Building regulations require waterproofing (tanking) in wet areas — at minimum the shower zone floor and walls to 1.8m height. Skipping waterproofing risks structural damage, mould, and invalidates most tile warranties.

### What tile size is best for a bathroom floor?

20x20cm tiles are the most popular for bathroom floors. They allow enough grout lines for drainage slope (important in walk-in showers), are easy to cut around fixtures, and come in the widest range of styles. Larger tiles (30x30cm+) suit bigger bathrooms.

### How long does a bathroom renovation take?

A small bathroom (under 6 sqm) takes 3-5 days DIY, including tiling, waterproofing, and grouting. A medium bathroom takes 5-8 days. Professionals are typically 30-40% faster. Allow extra time for fixture installation, plumbing changes, or moving walls.

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