Flooring & Tile · Project planning

Thinset & Tile Adhesive Calculator

Enter the low and high coverage stated for your mortar, bag size and trowel configuration. Both ends of the range remain visible.

By Alish Gautam, Software Developer · Updated · Calculation methodology

Start with the editable example below. Dimensions retain their physical size when units change. Region sets currency labels without converting currencies; confirm entered quotes after changing region.

Measured tiled surfaces

Use non-overlapping rectangles. Enter openings as area on the surface they interrupt.

Room / surface 1
Product settings
Product and system dimensions
Editable arithmetic example. Replace with your project or product specification.
Editable arithmetic example. Replace with your project or product specification.
Optional supplier product name, chart revision or quote reference, saved in shared project state.
Advanced settings
Advanced planning settings
Planning allowance, not a code or industry requirement. Set zero to order the exact rounded takeoff.
Cost settings · USD
Optional quote prices
Optional supplier quote in the selected currency. Blank omits cost.

Project takeoff

Whole packages round up. Allowance is separate from purchased surplus. Prices omit labor, delivery, tax and other items unless explicitly entered.

Gross measured area
120 ft²
Opening / exclusion deductions
0 ft²
Low bag estimate at high coverage
3
Conservative bags at low coverage
4

Supplier-ready material list

Conservative mortar bags
4
Geometry / layout breakdown
Dimensions use the selected measurement system.
SurfaceMaterialGross (ft²)Net (ft²)
Room / surface 1floor120120

Notch volume alone is not mortar yield. Verify actual contact, back-buttering, substrate and tile instructions; the example coverage range is editable.

How it works

Low bag estimate = ceil(planned area / high coverage). Conservative bag estimate = ceil(planned area / low coverage).

Assumptions and limitations

Notch volume alone is not mortar yield. Verify actual contact, back-buttering, substrate and tile instructions; the example coverage range is editable.

Whole packages round upward after the chosen allowance. Physical geometry and purchase reserve are separate. Manufacturer and project specifications override editable examples; the selected region does not establish a local code requirement.

Sources and boundaries

MAPEI: Keraflex Plus

Open the source · Product page · Reference checked 2026-10-04

Scope: Mortar technical documentation

Used for: Coverage-chart lookup and product scope.

Does not establish: Universal trowel yield; Unverified bag coverage preset.

Use the current product document to verify numerical inputs. Coverage is entered as a range for the actual product and bag size.

Schluter Systems: How Trowel Notch Size Changes Thinset Application

Open the source · Web guidance; edition not stated · Reference checked 2026-10-04

Scope: Mortar application guidance

Used for: Notch size does not guarantee contact; check coverage.

Does not establish: Specific mortar bag yield; Waterproofing design from tile area.

Tile coverage must be verified in the installation.