Site Math Without the Gamble.
Protect Your Margins with the UK's Definitive Groundworks Tool.
Under-ordering stops the job. Over-ordering burns the margin. Dig Fill calculates exact material needs—accounting for compaction, bulking, and structural displacement—right from your phone.
Are You Tired of Guessing the Tonnage?
In the ground, it's cubic metres. On the invoice, it's tonnes. If you get the conversion wrong, you pay the price.
The Over-Order
You order too much MOT Type 1 because you didn't account for the 15% compaction factor. Now you're paying for surplus material and the muck-away to get rid of it.
The Muck-Away Mess
You forget that stiff clay bulks by up to 40% once it leaves the trench. Suddenly three piles of spoil, no grab lorries on schedule, and a blocked site.
The Regulation Trap
Mix your waste streams and face an active waste bill at the tip — versus significantly lower rates for correctly classified inert spoil.
"If the aggregate truck is half-empty, you've wasted money. If the trench is half-empty, you've wasted a day."
Built for Muddy Hands
We didn't build a spreadsheet. We built a tool. Designed to be used on-site, in the rain, with one hand while you're standing by the excavator track.
Dig Fill: Precision Logic for Muddy Hands.
Dig Fill isn't a generic spreadsheet. It's a purpose-built engine calibrated for UK construction standards. We've baked in the BS EN 1917 dimensions, the Part H drainage specs, and the real-world density of UK soils.
Automatic Compaction & Bulking Factors
No more guessing. Our tool knows exactly how much a cubic metre of Type 1 weighs after you've hit it with the wacker plate.
Structure Displacement Logic
We automatically deduct the volume of pipes, manhole rings, and benching so you order the exact amount of backfill required.
Offline-First Design
Works on-site where 4G doesn't. Full calculation power even when you're chest-deep in a trench with zero signal.
3 Steps to "Dead Nuts" Accuracy
From trench specs to exact tonnage in under a minute.
Select Your Build
Choose from our Trench Builder, Manhole Logic, or Muck Logistics modules.
Input Site Specs
Enter your dimensions in metres or millimetres. Select your material — from 10mm Pea Shingle to Grade C35 Concrete.
Get Your Logistics
See exactly how many tonnes to order and how many 8-wheel tippers you need. Save to your Site Log securely.
Trusted by The Trade
What Site Professionals Say
"Saved me from under-ordering Type 1 on a 200m driveway. The compaction factor alone saved the job. Dead nuts accurate."
Dave R.
Groundworks Contractor, Midlands
"Used the Manhole Logic tool on a 1050DN chamber install. Had the ring count and backfill tonnage before the excavator was even warmed up."
Kevin T.
Site Agent, Yorkshire
"The clay swell factor on the muck-away module is spot on. Booked exactly the right number of tippers first time. No standing time."
Sarah M.
Civil Engineer, South East
Built to the Standards You're Inspected On.
Accuracy You Can Audit. Every calculation is archived in your Site Log, ready for Building Control or your commercial manager.
Join site managers already making accurate material calls.
Free for Solo Gangers during Alpha Testing