Topdressing Calcuator

Lawn Measurement & Topdressing Calculator | iGrow Carpet

Lawn Measurement & Topdressing Calculator

Draw your lawn on the map or enter dimensions manually
Get accurate estimates for how much topdressing material you need

📍 Find & Draw Your Lawn

Search for your address, then draw your lawn boundary on the satellite view

🌱 How to Measure Your Lawn

  1. Search for your address above
  2. Click "Start Drawing" below
  3. Click points around your lawn boundary
  4. Click the first point again to complete

The area will be calculated automatically!

Area: 0 m²

📏 Or Enter Dimensions Manually

🧮 Topdressing Calculator

Based on your lawn measurements

Your Lawn Area
0
square metres
3mm
Thin layer
5mm
Medium layer
10mm
Thick layer
You'll Need Approximately
0 litres
of topdressing material
Volume in cubic metres 0 m³
Approx. weight (dry) 0 kg
Bags needed by size:
10 litre bags 0 bags
25 litre bags 0 bags
40 litre bags 0 bags
50 litre bags 0 bags
25kg bags 0 bags
Bulk bags (~900L)* 0 bags

*"Ton bags" rarely contain a full tonne - typically 800-1000 litres

⚠️ Important - Please Read

  • This is an estimate for guidance only - actual requirements may vary
  • Uneven lawns with humps, dips, and hollows will need more material in low areas
  • Different topdressing materials have varying densities - always check supplier recommendations
  • Better to have a little extra than to run short mid-job

💡 Application Tips

Apply when grass is actively growing (spring or early autumn). Spread evenly and work into the lawn with a stiff brush or rake. Don't smother the grass - blades should still be visible after application.

🌱 Keep Your Lawn Looking Its Best

Levelling is just the start. For a lawn that stays thick, green, and healthy year-round, proper feeding makes all the difference.

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Lawn Fertiliser

Premium slow-release fertilisers for every season - Spring, Summer, Autumn and Pre-Seeder formulas

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Seaweed Lawn Booster

Feed your soil, not just your grass. Natural seaweed extract for stronger roots and healthier growth

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Understanding Topdressing

🌱 Types of Topdressing

Topdressing comes in different types including: sand and soil mix (typically 70/30), compost, and loam or screened topsoil. Each has different uses - sand-based mixes improve drainage, while compost and loam add organic matter.

📦 Common Bag Sizes

Bagged topdressing (compost, soil, screened topsoil) typically comes in: 10L, 25L, 40L, 50L or 25kg bags. Bulk "ton bags" rarely contain a full tonne - they're usually 800-1000 litres, so always check the actual volume or weight.

📅 When to Apply

Best applied in spring (April-May) or early autumn (September) when grass is actively growing. Avoid applying when the ground is frozen, waterlogged, or during drought conditions when grass is dormant.

🎯 Getting It Right

Spread evenly using a shovel and work into the lawn with a stiff brush or lute. For compost and soil/loam, a compost roller can help work it in - but don't use a roller on sand. The grass blades should still be visible after application.

📚 Continue Learning

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