Self-Levelling Compound Calculator
Calculate how much self-levelling or smoothing compound you need based on floor area, application depth and manufacturer-stated product coverage.
Typical use: Latex & water-based levelling compounds, surface smoothing, subfloor preparation
Using this calculator
Open the interactive calculator to enter your project measurements and adjust the available settings. Review the calculated quantity and buying units before ordering materials. Check product coverage, pack sizes and installation guidance with the manufacturer or supplier.
Further reading in this project area
How to Measure a Room for Carpet, Underlay & Gripper
Measure rooms for carpet without relying on floor area alone, and understand roll width, seams, doorways, underlay and gripper requirements.
- Sketch the room first, including alcoves, chimney breasts, bay windows, door recesses and any sections that make the floor shape irregular.
- Measure the maximum length and maximum width at the widest points. Carpet is normally ordered as rectangular cuts from a fixed roll width, so the widest dimensions matter even where part of the room is narrower.
- Measure alcoves and bay-window projections separately and add them to your sketch rather than assuming the main rectangle covers them.
- Check the carpet roll width offered by the supplier. Common roll widths can determine whether the room can be covered in one piece or whether a join is required.
Laminate Flooring Basics: Planning, Underlay & Expansion Gaps
Plan a floating laminate floor properly, including subfloor condition, underlay, expansion gaps, staggered joints and manufacturer-specific limits.
- Read the flooring manufacturer’s installation instructions before planning the room. Expansion gaps, maximum uninterrupted floor dimensions, underlay and moisture requirements can differ between products.
- Check that the subfloor is clean, dry, stable and sufficiently flat for the flooring system. Correct local high spots, loose boards or significant hollows before laying the floor.
- Confirm whether a damp-proof membrane or combined underlay is required for the particular subfloor and product, especially over mineral or concrete-based floors.
- Plan the board direction and first/last row widths before starting so that you avoid a very narrow final strip or awkward layout around doorways.