Enter your bed, pathway, or landscaped area dimensions. Get cubic feet, cubic yards, and exact bag count in under 5 seconds. No app, no account, no guessing.
From dimensions to bag count in under 5 seconds. No app, no account, no waiting.
Measure length and width of your garden bed, pathway, or landscaped area. Choose your shape — rectangle, circle, triangle, pathway, or L-shape. Use any unit — feet, inches, centimetres, or metres.
⏱ 2 minutes to measureEnter the depth you plan to apply. Standard garden beds use 2–3 inches. Pathways typically use 3–4 inches. Weed suppression needs at least 3 inches. The depth field accepts any unit.
⏱ Optional — 10 secondsThe calculator returns cubic feet, cubic yards, litres, and exact bag counts for 2 cu ft and 3 cu ft bags — the most common mulch bag sizes at every garden centre.
⏱ Under 5 secondsNo switching between tools or manual conversions. Everything a gardener needs — in one screen.
The standard unit for bagged mulch in the US and UK. Every bag label shows cubic feet — this number tells you exactly how many bags to grab at the garden centre.
The unit for bulk mulch delivery. For volumes above 2 cubic yards, ordering bulk from a landscape supplier saves 55–70% compared to buying individual bags.
Results for 2 cu ft and 3 cu ft bags — the two most common mulch bag sizes. Always rounded up so you never run short mid-project.
Mulch sold in Europe, Australia, and South Asia is measured by the litre. The litre result removes the need for any manual unit conversion at the store.
5 reasons this tool beats every other online mulch calculator.
Most online mulch calculators push you toward a paid app after a few uses. This calculator has no paywall and no use limit. Every calculation is free, every time.
No login, no email, no personal data. Open the tool, enter your dimensions, get your answer. Nothing standing between you and your result.
Rectangle, circle, triangle, pathway, and L-shape. Most calculators only handle rectangular beds — this one covers every real garden layout including winding paths.
Enter dimensions in feet, inches, centimetres, or metres. Mix units across fields if needed. The calculator converts everything automatically.
Other calculators give cubic yards only. This one gives exact bag counts for 2 cu ft and 3 cu ft bags so you know what to load into the trolley.
Works in Chrome, Safari, and Firefox on any device. No installation, no storage used on your phone, no permission requests.
The calculator works for all common organic and inorganic mulch types.
Simple geometry applied instantly — no rounding errors, no manual conversion.
When you enter your dimensions and press Calculate, the tool converts all measurements to feet, applies the correct formula for your selected shape, and returns the volume in cubic feet — then automatically converts to cubic yards and litres.
For rectangular beds and pathways: Volume = Length × Width × Depth. For circular beds: Volume = π × (Diameter ÷ 2)² × Depth. For triangular beds: Volume = (Base × Height ÷ 2) × Depth. For L-shapes: both zones are calculated separately and added together.
Bag counts divide the cubic feet result by the standard bag size and round up — so you always leave the garden centre with enough mulch, never one bag short of finishing the job.
Rectangle, circle, triangle, pathway, L-shape — each formula applied automatically on click.
Inches, feet, cm, metres — all converted to feet before calculation for precision.
8.1 cu ft ÷ 2 = 5 bags — not 4. Always enough, never short.
Results accurate to 0.01 cubic feet — precise enough for any garden or landscaping project.
Estimating by eye leads to the same problem every time — wrong bag count.
| Feature | ZonedGarden Calculator | Manual Formula | Guessing by Eye | Generic Online Calc |
|---|---|---|---|---|
| Exact cubic feet result | ✓ Free | ✓ | ✗ | ✓ |
| Bag count for 2 cu ft + 3 cu ft bags | ✓ Free | ✗ | ✗ | Sometimes |
| 5 shape types including pathway | ✓ Free | ✓ if you know each formula | ✗ | ✗ rectangle only |
| Metric + Imperial units | ✓ Free | ✗ manual convert | ✗ | Rarely |
| Litre output for metric users | ✓ Free | ✗ | ✗ | ✗ |
| No account required | ✓ | ✓ | ✓ | Often requires signup |
| Result in under 5 seconds | ✓ | ✗ takes 2–5 mins | ✓ (often wrong) | ✓ |
Depth determines weed suppression, moisture retention, and how many bags you need. Use this table before calculating.
| Application | Min Depth | Recommended | Notes |
|---|---|---|---|
| General garden beds | 2 in (5 cm) | 3 in (7.5 cm) | Standard for most flower and shrub beds — suppresses weeds and retains moisture |
| Vegetable beds | 1.5 in (4 cm) | 2 in (5 cm) | Shallower layer around vegetables — prevents fungal splash and soil compaction |
| Tree and shrub rings | 3 in (7.5 cm) | 4 in (10 cm) | Keep mulch 6 inches away from the trunk — "mulch volcanoes" cause rot |
| Pathways (wood chip) | 3 in (7.5 cm) | 4–6 in (10–15 cm) | Deeper layer needed for pathways — compensates for foot traffic compaction |
| Playground areas (rubber) | 6 in (15 cm) | 9 in (23 cm) | Safety standard for fall cushioning — check local playground safety codes |
| Weed suppression | 3 in (7.5 cm) | 4 in (10 cm) | Minimum 3 inches needed to block light to weed seeds below the surface |
| Slope erosion control | 2 in (5 cm) | 3 in (7.5 cm) | Straw or wood chips on slopes — staple erosion control blanket underneath |
| Winter frost protection | 4 in (10 cm) | 6 in (15 cm) | Deeper layer insulates plant roots from freeze-thaw cycles |
These 5 habits prevent the most common mulch-buying mistakes.
Measure from the inner edge of any border or edging. The inside area is the actual mulched surface — not the outer frame.
3 inches for general beds. 4–6 inches for pathways. 6 inches for playgrounds. Wrong depth means wrong bag count.
Fresh mulch compacts 10–20% after the first rain. Buy 15% more than the result shows to fill the gap after settling.
Keep mulch 6 inches clear of trunks and stems. Subtract this gap from your circular bed calculation to avoid over-buying.
The calculator always rounds bag counts up. Never round down — one short bag means a second trip to the garden centre.
7 questions gardeners ask most before buying mulch.
7 types of gardeners and professionals rely on this tool every season.
Spring mulch refresh for flower beds, new raised bed edging, and annual top-up after winter mulch has decomposed.
Calculating mulch rings around established trees and shrubs — the most common mulch application in residential gardens.
Planning wood chip or gravel pathways through garden areas — paths need deeper mulch than beds and different bag counts.
Horticulture, landscape design, and environmental science coursework — accurate mulch volume calculations for project plans.
Accurate mulch cost quotes for residential and commercial clients. Precise calculations protect profit margins on large projects.
Mulching an entire new garden in one project. Calculate all bed and pathway areas, then place one bulk delivery order.
Playground safety mulch calculations. Rubber and wood chip mulch for play areas requires precise depth for safety compliance.
