Bark Chippings Calculator

How Much Bark Chippings Do I Need?

This free calculator works out exactly how much bark chippings you need for any outdoor project — garden paths, play areas, driveways, decorative borders or weed suppression. Select your project type to get the recommended depth, enter your area dimensions, and get instant results in litres, bags and bulk bags.

The formula is simple: length × width × depth = volume. The calculator converts your depth from millimetres to metres, then gives you the total in cubic metres and litres. Since bark chippings are sold by volume in the UK (unlike aggregates which are sold by weight), the results are in litres and bags rather than tonnes.

Bark chippings vs bark mulch: This calculator is for bark chippings — the chunky, longer-lasting pieces used for paths, play areas and decorative coverage. If you’re mulching garden beds to enrich the soil, our bark mulch calculator is designed for that purpose.

Recommended Bark Chippings Depth by Project

The right depth depends on what the bark chippings are being used for. Deeper is not always better — too much bark on a decorative border wastes money, while too little on a play area is a safety hazard.

Play Bark Safety — BS EN 1177 Guide

If you’re laying bark chippings in a children’s play area, you must use certified play bark that meets BS EN 1177 — the European standard for impact-absorbing playground surfacing. Standard bark chippings are NOT suitable for play areas.

What BS EN 1177 requires

• Critical fall height testing: Play bark must be tested to absorb impact from the maximum fall height of the equipment
• Minimum depths: 200mm for equipment up to 1.5m, increasing to 300mm for equipment up to 3.0m
• Safety zone: Bark must extend at least 1.75 metres beyond the equipment in all directions
• Regular inspection: Check depth monthly — play bark compacts and decomposes, reducing its effectiveness
• Annual top-up: Add 25–30% of the original volume each year to maintain safe depths

Play bark depth by equipment height

Important: These are minimum uncompacted depths. After settlement (which can be 15–20% in the first month), you may need to top up immediately. Always buy 20% more than calculated to account for initial settlement.

Bark Chippings for Garden Paths

Bark chippings make excellent, low-cost garden paths. They’re softer underfoot than gravel, look natural in garden settings, and are easy to lay yourself in an afternoon.

How to lay a bark chippings path

• 1. Mark out your path — use string lines or a garden hose to define the edges. Standard width is 0.9–1.2m for a single-person path.
• 2. Excavate to 100mm deep — remove turf and topsoil. If drainage is poor, dig 25mm deeper and add a layer of coarse gravel.
• 3. Lay weed membrane — heavy-duty landscape fabric prevents weeds growing up through the bark.
• 4. Install edging — timber edge boards, log rolls or metal edging stop the bark spreading onto borders and lawns. This is essential — without edging, bark migrates everywhere.
• 5. Spread bark chippings to 75mm — rake level and compact lightly by walking along the path.

Need to calculate the sub-base for a more permanent path? Our MOT Type 1 calculator works out hardcore quantities, and the gravel calculator handles decorative stone surfaces.

Bark Chippings Coverage Per Bulk Bag

A standard bulk bag contains approximately 1 cubic metre (1,000 litres) of bark chippings. The area it covers depends on the depth you lay.

Bark Chippings vs Bark Mulch — Which Do You Need?

They look similar but serve different purposes. Choosing the wrong one wastes money and gives poor results.

How Much Do Bark Chippings Cost? UK Price Guide 2026

Bark chippings prices vary by grade, quantity and supplier. Play bark is more expensive due to certification requirements.

Delivery charges typically add £30–£60 depending on distance. For quantities over 3 cubic metres, always get quotes from local landscaping suppliers — bulk delivery is significantly cheaper than bags.

How Much Bark Mulch Do I Need?

Whether you call it bark mulch, bark chippings or simply “bark,” the calculation is the same: length × width × depth = volume. The calculator above works for both — just select your project type and enter your measurements. The difference is in the product you buy, not the maths.

For most garden mulching jobs, you need a layer between 50mm and 100mm deep. Thinner layers let weeds through; thicker layers waste money and can smother shallow-rooted plants. Here is how much bark mulch you need per square metre at each common depth:

• 50mm deep — 50 litres per m² (decorative borders, light weed suppression)
• 75mm deep — 75 litres per m² (paths, solid weed barrier with membrane)
• 100mm deep — 100 litres per m² (driveways, heavy-traffic areas)

What area does 1,000 litres of bark cover? A standard bulk bag holds roughly 1,000 litres (1 cubic metre). At 50mm deep it covers 20 m², at 75mm deep it covers 13.3 m², and at 100mm deep it covers 10 m². For a typical 4m × 3m border at 50mm depth, one bulk bag is enough with a little left over for top-ups.

How much does 100 litres of bark chippings cover? A single 100-litre bag covers 2 m² at 50mm deep, 1.33 m² at 75mm deep, or 1 m² at 100mm deep. Most garden centre bags are 80 litres rather than 100, so an 80L bag covers about 1.6 m² at 50mm or just over 1 m² at 75mm.

Bark Mulch vs Bark Chippings — What’s the Difference?

The terms are often used interchangeably, but they are different products. Bark mulch is finer, shredded bark (typically 5–20mm pieces) that breaks down within one to two seasons, feeding the soil as it decomposes. It is ideal for garden beds, borders and around tree bases where you want to improve soil structure over time.

Bark chippings are coarser, chunkier pieces (20–60mm) that last two to four years before needing replacement. They hold their shape better, stay in place on paths, and are the right choice for walkways, play areas, driveways and any surface that takes foot traffic. If you need bark for garden beds, our mulch calculator gives tailored results for that job.

How Many Litres of Bark Per Square Metre?

The number of litres you need per square metre depends entirely on the depth. Use this quick-reference table to estimate quantities before you buy:

For example, a 6m × 2m path at 75mm deep needs 900 litres — 12 bags of 80L or just under one bulk bag. Always round up and add 10% for uneven ground and settling.

Top-up tip: Both bark mulch and bark chippings settle and decompose over time. Finer bark mulch loses roughly 30–40% of its volume in the first year, while coarser chippings lose around 15–25%. Budget for an annual top-up layer of 25mm to maintain effective coverage and keep weeds at bay. Laying a heavy-duty weed membrane underneath extends the life of any bark product significantly.

Frequently Asked Questions

Types of Bark Chippings — Which One Do You Need?

Not all bark chippings are the same. The type you choose affects how long it lasts, what it looks like, and whether it’s suitable for your project. I’ve laid every type listed below in real UK gardens, and the differences matter more than most people realise.

Ornamental bark is the fine-grade option (10–25mm), typically made from pine or spruce. It gives a neat, uniform appearance that suits front gardens and show borders. The downside is it decomposes faster than coarser grades — expect to replace it every 12–18 months. It also tends to blow around in exposed spots because the pieces are so light.

Play bark is specifically manufactured and tested to meet BS EN 1177 — the UK and European standard for impact-absorbing playground surfacing. The particles are engineered to be free of splinters, sharp edges and contaminants, and the material must prove its shock-absorption capacity at defined depths. You cannot substitute standard bark chippings for play bark in a children’s play area. Play bark costs 30–50% more than standard bark, but that premium pays for the safety certification.

Composted bark is bark that has been partially broken down before sale. It has a darker, richer colour and a finer texture than fresh bark. Because the decomposition process has already started, it enriches the soil faster — making it a good choice for border beds where you want both weed suppression and soil improvement. It settles more quickly than fresh bark, so lay it 10–15% deeper than usual. Our soil calculator can help if you’re also adding topsoil to the same beds.

Bark nuggets are the largest grade — chunky pieces typically 40–80mm. They look striking in large borders, around specimen trees and in modern landscaping schemes. Because of their size, they take the longest to decompose (3–5 years) and stay in place well even on gentle slopes. The trade-off is they’re less comfortable to walk on, so they’re not ideal for paths.

Wood chip is often confused with bark chippings, but it includes the inner wood as well as the bark. Arborists produce it as a by-product of tree surgery, and you can sometimes get it free or very cheaply from local tree surgeons. It decomposes faster than pure bark and can temporarily lock up nitrogen in the soil, so keep it away from young or shallow-rooted plants. It works well for informal woodland paths and utility areas.

How to Lay Bark Chippings — Step by Step

Laying bark chippings is a straightforward weekend job. I’ve done this dozens of times for clients and in my own garden, and the preparation is what separates a path that looks great for years from one that’s overrun with weeds in three months.

Step 1 — Clear the area

Remove all existing weeds, grass and debris from the surface. For established weeds, dig out the roots rather than just cutting the tops — perennial weeds like bindweed and couch grass will push straight through bark if the roots are left intact. If you’re covering a large area of lawn, use a spade to strip the turf first. Rake the soil level and remove any stones larger than 50mm.

Step 2 — Lay weed membrane

This step is essential for paths, driveways and play areas. Use a heavy-duty woven geotextile membrane rated at a minimum of 100g/m² — the cheap 50g/m² fabric tears within a year. Overlap sheets by at least 150mm and secure with galvanised membrane pegs every 300mm along the edges. For borders around existing plants, cut X-shaped slits where the plants emerge and fold the flaps neatly around the stems.

Step 3 — Install edging

Without edging, bark chippings migrate into your lawn, borders and everywhere else within weeks. Options include timber edge boards (pressure-treated, at least 100mm tall), log rolls, metal lawn edging or recycled plastic edging. Pin the edging securely into the ground — it needs to be at least as tall as your planned bark depth. For curved paths, flexible metal or plastic edging bends to shape.

Step 4 — Spread bark to the correct depth

Tip the bark onto the membrane and spread it with a landscaping rake. The correct depth depends on the project: 50mm for decorative borders, 75mm for garden paths and weed suppression, and 200mm or more for play areas (following BS EN 1177 requirements for the equipment fall height). To check depth as you go, push a ruler or stick through the bark to the membrane. For play areas, measure at multiple points — the depth must be consistent across the entire safety zone.

Step 5 — Compact lightly

For paths and driveways, walk along the surface to press the bark down gently. This helps it settle and reduces the amount of initial sinkage. Do not use a roller or plate compactor — you want the bark to remain loose enough to drain freely. For play areas, do not compact at all; the shock-absorbing properties depend on the bark staying loose. After 2–4 weeks, check the depth and top up any areas that have settled below the target.

Need to work out how much bark this will take? Use the calculator at the top of this page, or check our mulch calculator if you’re covering garden beds with finer bark mulch.

Bark Chippings Cost Guide UK 2026 — What to Budget

Bark chippings pricing in the UK depends on the grade, the quantity you buy, and how it’s delivered. I’ve found that the difference between buying individual bags from a garden centre and ordering a loose load from a landscaping supplier can be 40–60% — so it pays to plan ahead.

Price breakdown by buying format

Individual bags (80 litres): Expect to pay £3–£5 per bag for standard bark chippings, rising to £5–£7 for certified play bark and ornamental grades. An 80-litre bag covers roughly 1 square metre at 75mm deep (path depth). Bags are convenient for small top-ups and tight access, but the cost adds up quickly for anything over 5 square metres.

Bulk bags (approximately 1 cubic metre / 1,000 litres): A bulk bag of standard bark costs £50–£80, while play bark runs £80–£130 per bag. One bulk bag covers about 13 square metres at path depth (75mm). Most suppliers offer free or reduced delivery on orders of two or more bags. You will need a clear, accessible delivery spot — bulk bags arrive on a flatbed truck with a crane or tail lift.

Loose loads (tipped delivery): For quantities over 3 cubic metres, loose delivery is the cheapest option. Prices range from £40–£70 per cubic metre for standard bark, depending on your location and the supplier. Delivery charges typically add £30–£60. You will need space for the tipper truck to reverse in, and a wheelbarrow to move the bark to where it is needed.

Project cost examples

Money-saving tip: For anything over 2 cubic metres, always ring at least three local landscaping suppliers for a loose-load quote before buying bags from a garden centre. The savings are significant, and most will deliver within a few days.

5 Common Bark Chippings Mistakes (and How to Avoid Them)

I’ve seen these same mistakes repeated on hundreds of garden projects. They are all easy to avoid if you know what to look for.

1. Laying bark too shallow

The most common mistake by far. Bark chippings laid at 25–30mm deep look fine on day one, but within weeks you can see soil through the gaps, weeds push through, and the coverage looks patchy. The minimum effective depth for weed suppression is 50mm, and for paths 75mm is the standard. For play areas, skimping on depth is not just a cosmetic issue — it is a safety hazard. Always use the recommended depths from our calculator rather than eyeballing it.

2. Skipping the weed membrane

Without a membrane underneath, weeds grow up through the bark within a season, and the bark gradually mixes into the soil below. A heavy-duty woven membrane (100g/m² minimum) is a one-time cost that saves years of weeding. The cheap non-woven fabrics degrade in sunlight and tear easily — spend the extra £10–£15 on a proper geotextile. The only exception is borders where you want the bark to break down and feed the soil, but even then, persistent weeds will be a problem.

3. Piling bark against plant stems

Bark heaped against the stems of shrubs, roses and trees traps moisture against the bark (the plant bark, not the chippings). This creates ideal conditions for fungal diseases like collar rot, which can kill established plants. Always leave a 50–75mm gap between the bark chippings and the base of any plant. Pull the chippings back to create a small ring of bare soil around each stem. This also helps rainwater reach the roots rather than running off the bark surface.

4. Using play bark for decorative areas

Play bark costs 30–50% more than standard bark chippings because of the BS EN 1177 certification and testing. There is no visual or functional benefit to using it in a decorative border or on a garden path — you are paying a premium for safety properties you do not need. Save play bark for actual play areas and use standard bark chippings or ornamental bark for everything else. The calculator at the top of this page adjusts pricing based on the bark type you select.

5. Not topping up annually

Bark chippings are a natural material. They decompose. In a typical UK climate, standard bark breaks down by 25–30% per year. A path laid at 75mm deep will be around 50mm after one year and barely 35mm after two — at which point weeds break through, it looks thin, and the membrane starts showing. Set a reminder each spring to check depths and add a top-up. Buying one or two extra bags at the start gives you a ready supply for mid-year patches. For play areas, this is not optional — reduced depth means reduced safety.

Best Bark Chippings UK 2026 — Our Top Picks

These are the most popular bark chippings products available in the UK right now — from decorative borders to certified play bark.

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Where to Buy Bark Chippings in the UK

For larger quantities, bulk bags or loose delivery from a landscaping supplier is the most cost-effective option.

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