Garden bed area + spread depth → cubic yards, bags and bulk — multi-bed, metric/imperial — browser-only
- Runs locally
- Category Calculator
- Best for Getting a realistic range before a purchase, plan, workout, or schedule decision.
What this tool does
Free online mulch calculator for garden beds. Measure each bed with a tape, add it as a rectangle or a circle (as many beds as your yard actually has), pick a spread depth, and get the exact volume in cubic yards or cubic meters, the number of bags to buy at the garden center, and the loose bulk figure if you order a scoop delivered instead. Defaults to the common 5–8 cm (2–3 in) layer that suppresses weeds without smothering roots, and to the US-standard 2-cubic-foot bag — but bag size (1.5 / 2 / 3 ft³, 50 L, 70 L) is selectable for any market. A small over-order margin (default 5%) covers settling and under-measured edges so you do not run one bag short on the last square meter. Depth has its own unit field (in / cm) on purpose: it is a small number, and mixing it up with the area unit is the single biggest cause of an order that is 10× too big or too small. A built-in bulk-vs-bags hint flags the point (~12 bags) where a delivered scoop almost always beats bagged once you count the trips and the price per cubic yard. Everything runs in your browser — no sign-up, no upload.
Tool details
- Input
- Numbers
- The page exposes text boxes, numeric controls, file pickers, or structured inputs depending on the tool.
- Output
- Live result + Copy
- The result area focuses on usable output, with copy, download, or preview actions when supported.
- Privacy
- Browser-side processing
- The main tool logic does not call an external API, so inputs normally stay in the current tab.
- Save / share
- Shareable URL state
- Key settings are encoded in the URL so another person can reopen the same setup.
- Performance budget
- Initial JS <= 12 KB
- No WASM budget is declared, keeping the tool quick to open on mobile.
- Best fit
- Calculator · Designer
- Category and role tags drive related tools, internal links, and quick fit checks.
How to use
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1. Input
Paste or drop your content into the tool panel.
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2. Process
Click the button. All processing is local in your browser.
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3. Copy / Download
Copy the result or download to disk in one click.
How Mulch Calculator fits into your work
Use it for fast estimates, comparisons, and planning numbers before you make the final call.
Calculation jobs
- Getting a realistic range before a purchase, plan, workout, or schedule decision.
- Comparing scenarios by changing one input at a time.
- Turning rough assumptions into a number you can discuss.
Calculation checks
- Double-check units, dates, rates, and rounding assumptions.
- Treat health, finance, tax, and legal outputs as planning aids, not professional advice.
- Save the inputs that produced an important result so you can reproduce it later.
Good next steps
These links move the current task into a more complete workflow.
- 1 Concrete Calculator Slab, column, round footing & stairs → cubic meters/yards + cement bags, sand and gravel — browser-only Open
- 2 Paint Calculator Wall area → litres & cans of paint, with doors/windows deducted, coats and price — metric & US units, browser-only Open
- 3 Unit Converter Convert between length, weight, temperature, area, volume, speed, time — instant, browser-only Open
Real-world use cases
Re-mulch a front-yard bed for the season
The mulch along the front walk has thinned out and faded over the winter. You measure the bed: 4 m long, 1.5 m wide, and you want a fresh 5 cm top-up. Add one rectangle, set depth to 5 cm, and the tool says 0.3 m³ — about 6 of the 50 L bags, or 5 with the 70 L size. Below the 12-bag line, so the hint tells you bagged is the easy call here. You load the car once and you are done by lunch, no delivery to schedule.
Build a tidy ring around a new tree
A young maple needs a mulch ring to keep the mower away from the trunk and hold moisture. The ring is 1.8 m across. Add a circle, enter 1.8 m as the diameter (not the radius — the tool halves it for you), set a gentle 4 cm depth so you are not piling mulch against the bark, and you get the exact volume for one bag with margin to spare. Do three trees at once by adding three circles and reading the combined total.
Order bulk for a long landscaping border
A new garden border runs the length of the fence: 18 m long, 0.9 m wide, going down 8 cm to smother the grass underneath. Add the rectangle, set 8 cm, and the volume lands at 1.3 m³ — well past the 12-bag crossover, so the tool flags bulk. You order 1.7 cubic yards delivered instead of hauling 23 bags home, and the price per yard makes the delivery fee worth it.
Quote a client job as a landscaper
A client wants three beds re-done: a 6 m × 2 m bed, a 4 m × 3 m bed, and a 2.4 m circular feature. Add all three, set the depth you are quoting, and the tool sums them into one total volume and bag count. Copy the summary straight into the estimate so the materials line is defensible — the client can see the area, depth and resulting cubic yards, not a number you pulled from the air.
Top up a gravel-free path with bark
A woodland path is 12 m long and 0.7 m wide, and you want a soft bark layer 6 cm deep so it stays comfortable underfoot without turning to mud. Add the rectangle, set 6 cm, switch the bag size to whatever your supplier stocks, and the calculator tells you how many bags cover the run — plus the bulk figure if the path is one of several jobs you are buying for at once.
Common pitfalls
Typing the depth in the area unit. A 3-inch layer is 0.25 ft, not 3 ft. If you enter "3" while the area dimensions are in feet and treat that as feet, your order is 12× too big. This tool gives depth its own in/cm field precisely so this cannot happen — keep depth in inches or centimeters.
Entering the radius of a circular bed instead of the diameter. The tool asks for the full distance across (the diameter) and halves it internally. Put a radius in that field and your area — and your order — comes out 4× too large.
Forgetting the over-order margin and buying exactly the calculated bags. Mulch settles after spreading and edges are always under-measured; ordering the bare minimum leaves you one bag short on the last stretch. Keep the default 5% (or bump it) so you finish the job in one trip.
Privacy
Every calculation — bed areas (rectangle L×W and circle π r²), total volume, bag count and the bulk cubic-yard figure — is plain JavaScript that runs entirely in your browser tab. No measurement, no bed dimension and no result is ever sent to a server, and nothing is logged or tracked. The one thing that travels: the shareable URL encodes your beds and depth in the query string, so if you paste a "share link" into a message, the destination server's access log will see those dimensions. For a garden that is harmless — but if that bothers you, copy the summary text instead of sharing the URL.
FAQ
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