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May 12, 2026
We checked the page logic, support notes, and related links on this page.
Project Hub
Soil and Landscaping Estimating
Estimate topsoil, mulch, compost, and bark quantities with a focus on installed depth, delivery format, and whether the job is better served by bags or bulk supply.
Landscaping4 calculatorsGuides and quote prep included
How to use it
Planning before buying
Use this project hub for a planning check, then confirm the final order or quote against live product data and site conditions.
Why trust it
See how the site is maintained
Read the calculator methodology and editorial policy for the standards behind these pages.
Start here
Start with the calculator that best matches the main material or buying format for the job.
Topsoil Calculator
Estimate topsoil volume, tonnage, bags, and rough cost for beds, borders, and levelling work.
Mulch Calculator
Estimate mulch volume, bags, and rough cost for beds and borders.
Compost Calculator
Estimate compost volume, bag counts, and rough cost for soil improvement jobs.
More calculators in this hub
Use these related pages when the same project includes extra materials, linked layers, or a different buying format.
Bark Calculator
Estimate bark coverage, volume, and bag counts for borders and pathways.
How to use this project hub
Start with the calculator that matches the material or buying format you actually need, then move into the related guides if you need more detail before buying or requesting quotes.
What affects estimates most
Dimensions, depth or coverage assumptions, waste allowance, and pack or stock-length rounding are usually the biggest drivers of the final buying number.
Why the linked guides matter
The extra guides in each hub explain common mistakes, trade-offs, and buying choices that a simple quantity figure cannot cover on its own.
Popular question pages
Use these pages for faster answers when you already know the basic dimensions of the job.
Topsoil Calculator by Volume
Work out how much Topsoil you need from length, width, depth, and a realistic waste allowance.
Topsoil Quantity Guide
Use the job dimensions to build a sensible order quantity for Topsoil.
Mulch Calculator by Volume
Work out how much Mulch you need from length, width, depth, and a realistic waste allowance.
Mulch Quantity Guide
Use the job dimensions to build a sensible order quantity for Mulch.
Compost Calculator by Volume
Work out how much Compost you need from length, width, depth, and a realistic waste allowance.
Compost Quantity Guide
Use the job dimensions to build a sensible order quantity for Compost.
Bark Calculator by Volume
Work out how much Bark you need from length, width, depth, and a realistic waste allowance.
Bark Quantity Guide
Use the job dimensions to build a sensible order quantity for Bark.
Guides and next steps
These guides help explain waste, product choice, and buying format once the first estimate is clear.
Topsoil Depth Guide
See how installed depth changes the final buying quantity for Topsoil.
Topsoil Bags vs Bulk Guide
Compare bagged and bulk buying routes for Topsoil.
Mulch Depth Guide
See how installed depth changes the final buying quantity for Mulch.
Mulch Bags vs Bulk Guide
Compare bagged and bulk buying routes for Mulch.
Compost Depth Guide
See how installed depth changes the final buying quantity for Compost.
Compost Bags vs Bulk Guide
Compare bagged and bulk buying routes for Compost.
Bark Depth Guide
See how installed depth changes the final buying quantity for Bark.
Bark Bags vs Bulk Guide
Compare bagged and bulk buying routes for Bark.
Use this project hub to brief suppliers or installers
Work through the core calculator first, then use the linked guides and quote checklist to request cleaner, more comparable prices.
- Confirm what the quote should include: materials only, labour only, or both.
- State access, finish level, timing, and any unknowns clearly.
- Ask each supplier or installer to price the same scope and exclusions.
You can also open the wider Soil and Landscaping Estimating project hub if the quote depends on more than one material.