Free calculator
Turf Calculator
Work out turf rolls from lawn area, supplier roll size and an explicit cutting allowance.
Open calculator →Garden project hub
Lawn & turf
The same lawn area can drive several different calculations, but the product rate or material depth changes the job.
Use the right quantity tool
Calculators for lawn & turf
Plan a new lawn or improve an existing one with separate tools for turf, seed, feed and topdressing.
Free calculator
Grass Seed Calculator
Calculate grass seed for a new lawn, overseeding or patching from the rate on your seed product.
Open calculator →Free calculator
Lawn Topdressing Calculator
Calculate a shallow lawn dressing in litres, cubic metres and bags without confusing it with deeper topsoil work.
Open calculator →Free calculator
Lawn Feed Calculator
Turn a product-label application rate into kilograms, pack count or theoretical pack coverage.
Open calculator →Free calculator
Topsoil Calculator
Calculate topsoil volume from area and depth, then match the result to the supplier bag or bulk specification.
Open calculator →Before you order
Keep the project decisions separate from the arithmetic
Starting a new lawn
Measure the actual lawn footprint first. Topsoil is a depth-and-volume job; turf is a roll-coverage job; seed is an application-rate job. Keeping those inputs separate lets you reuse the same area without pretending the products work the same way.
Improving an existing lawn
Overseeding uses a seed rate, topdressing uses a shallow depth in millimetres, and lawn feed uses the rate printed on the chosen product. The calculator should not decide those horticultural inputs for you.
When topsoil is the wrong calculator
A few millimetres over existing grass belongs in Lawn Topdressing. A deeper layer to prepare levels or a rootzone belongs in Topsoil. That distinction avoids ordering ten times too much material.
Supporting guidance
Read the guide when the difficult part is choosing the input
Practical guide
How to Prepare the Ground Before Laying Turf
A measurement-led new-lawn checklist before you order turf.
Read guide →Practical guide
New Lawn vs Overseeding
Work out which grass-seed job you are doing before applying the product rate.
Read guide →Practical guide
Lawn Topdressing Depth & Quantity
Understand shallow application depth, litres per square metre and when a levelling job is no longer routine topdressing.
Read guide →Continue the project
Useful next routes
Move to the next quantity only when it describes a genuinely different part of the job.
Measure the lawn firstUse simple shapes or an irregular-area workflow.Garden Area CalculatorGet the square metres before using turf, seed or feed rates.Soil & growing mediaMove into topsoil and compost quantities when ground preparation is part of the job.Depth & volume referenceSee how millimetres across a lawn become litres.