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Thinset Mortar Calculator

Estimate thinset mortar bags from tiled area, trowel notch, and entered product coverage, with a format-size guide.

Inputs

Project

Range: 1–100,000 ft2

Match the notch to the tile size and substrate. Larger tiles and uneven floors need deeper notches.

Range: 1–80 in

Longest edge of the tile. An edge of 15 in or more counts as large format and needs a medium-bed (large-and-plank) mortar and back-buttering for full contact.

Bag and allowance

Range: 10–80 lb

Range: 0–30

Covers mixing loss, back-buttering and trowel ridges left unused.

Result

Bags of thinset
2.00 bags
Published coverage per bag
95
Area to cover with allowance
132.0
Mortar weight (metric)
45.4 kg
Mortar weight
100 lb
Medium format: standard thin-set mortar; confirm the notch and full coverage

How this was calculated

Bags of thinset
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Planning estimate only. Verify the entered measurements, product data sheet, site conditions, and applicable local requirements before ordering or installing. This calculator does not establish product suitability or code compliance.