Free carpet calculator for UK Homes & Trade
Use our free carpet calculator to instantly calculate your room size in square metres, along with the amount of underlay, gripper and estimated carpet cost required. This tool is designed for UK homes and follows standard trade coverage rates.
How to Use the Carpet Calculator
• Enter your room length and width in metres • Add an optional price per m² to estimate cost • Adjust the underlay bale size if needed • Instantly see total floor area, underlay and gripper required
This calculator makes it easy to answer “how much carpet do it need, how much underlay do i need and how much gripper do I need at the same time.

Enter your room sizes to calculate how much carpet, underlay and gripper you need.
What This Carpet Calculator Works Out
This carpet calculator works out total floor area in square metres, the amount of underlay required, how many bales of underlay you need, and how many gripper sticks are required for your room. If you enter a price per m², it will also give you an estimated carpet cost.
Who This Calculator Is For
This tool is ideal for DIY homeowners, landlords, flooring installers, decorators and tradespeople who need quick, reliable carpet calculations for real projects.
Why Use FloorCalc
All FloorCalc tools are designed to save time, reduce waste and prevent over-ordering of materials. Our calculators are mobile-friendly, free to use and based on real-world UK trade knowledge.
For independent advice on choosing the right carpet type, pile and durability for your home, you can also refer to the Which? carpet buying guide for expert consumer guidance.

You can also try our tile calculator, paint calculator and Laminate flooring calculator for other projects.
Related Flooring Calculators:
Stair Carpet cutting plan generator
Explore Our Free Flooring & DIY Guides
Understand how to calculate tile quantities, plan layouts, and avoid wastage with a clear step-by-step guide.
How to calculate tiles without wasting money
Learn the simplest method to measure any room accurately using UK flooring standards — perfect for carpet, laminate, vinyl, and trade work.
How to Measure a Room for Flooring
Not sure how to measure your staircase? Our easy stair-measuring guide shows you exactly what to do.
How to measure stairs for carpet
Wondering in you need a plywood subfloor? Our guide tells you everything you need to know.