MOT Type 1 Calculator

Tonnes and bulk bags of MOT, compacted vs loose.

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Inputs

Purpose

Length(m)

Width(m)

Compacted depth(mm)

3 advanced inputs hidden. Switch to Advanced to fine-tune.

Confidencemedium· 71Complexitylow· 18

t required: 3.94t
Bulk bags (0.85t): 5

Heads-up: MOT Type 1 is sold loose but laid compacted. The tonnes shown already include the ×1.25 compaction factor — order the figure above, not the surface volume. Why it matters: Bulk bags are typically 0.7–0.85 t, not 1 t. Check your supplier's bag weight before dividing.

9 detailed breakdowns hidden — switch to Advanced for the full breakdown.

This app provides general UK guidance and material estimates only. It is not legal, planning, engineering or building-control advice. Always confirm requirements with your local planning authority, building control, utility providers, manufacturers or qualified professionals.