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tiletally

The space between the tiles

Grout quantity.
From joints to bags.

Enter tile dimensions, the joint you plan to fill and your chosen product’s consumption factor. See estimated kilograms before and after your allowance, then round to whole bags.

Free · no account · Calculator arithmetic runs locally

The product factor matters. Use a manufacturer’s consumption factor in kg per litre of filled joint. Loose dry-powder bulk density can be a different figure and is not a substitute. This simplified estimate does not select a grout or specify installation.

1. Tile and joint measurements

Use actual rectangular tile dimensions in millimetres. Area includes the tile field and its joints. Enter the depth that will actually be filled; the calculator cannot establish it from tile thickness.

This tool accepts joints up to 10% of the shorter tile side to keep its narrow-joint approximation bounded. That is a calculator limit, not a recommended joint width.

2. Product and allowance

If the product only gives a coverage table or mixing instructions, use its own calculator or ask the manufacturer for the correct consumption factor. Do not infer it from the amount of mixing water.

3. Your quote, if available

One bag size and one bag price per estimate. Delivery is added once. Enter quotes on the same tax basis; tax, discounts, tools and labour are not added.

The calculator code does not submit input values or save them automatically. Third-party advertising and traffic services operate separately; see Privacy.

Your quantity plan

Measure.
Check. Estimate.

Complete the five measurements and your product factor, or load the labelled example to explore the calculation.

Measure the filled space

The model uses tile perimeter relative to tile face area, then multiplies by joint width and filled depth. It assumes a uniform rectangular grid and narrow joints.

Use the product’s factor

Multiplying estimated litres by a suitable product consumption factor gives kilograms. Product packaging and the manufacturer’s calculator remain the checks for the actual material.