Work it out.
Calculators for the landscape gardening trade: measure up the area, find the number of plants, work out topsoil and gravel volume, count paving stones, calculate falls and dose seed and fertiliser. Enter your own measurements — the result updates live.
What do you want to find out?
Directory
Choose the question that resembles yours — then we open the right calculator.
- § 01How many m² is the bed, patio or lawn — even when it is made up of several shapes?Measurement — area →
- § 02How many ground-cover plants, perennials or small plants fit the bed at my planting spacing?Number of plants per area →
- § 03How many hedge plants should I order for a hedge of a given length and planting spacing?Hedge plants per metre →
- § 04How many m³ of topsoil or growing medium are needed for a bed or lawn at a given layer thickness?Topsoil/growing-layer volume →
- § 05How many m³ and how many tonnes of base gravel should I order for a sub-base of a given thickness?Gravel / sub-base volume →
- § 06How many slabs or paving stones fit my patio — per m² and in total including waste?Paving stones / slabs →
- § 07How much fall do I have — and is it enough? How much height difference does a given fall require over a given length?Fall / slope →
- § 08How many kg of grass seed do I need to sow or overseed a lawn of a given size?Grass seed quantity →
- § 09How many kg of lawn fertiliser do I spread over the area at a given dose?Fertiliser quantity →
- § 10How thick should the total surface be, and how many m³ of stable gravel and base protection does each layer require?Paving — build-up →
- § 11How many kg or m³ of joint sand should I use to fill the joints in a laying?Jointing-sand quantity →
- § 12Which commercial size does a measured stem circumference correspond to, and what is the stem diameter?Trunk circumference — tree →
- § 13How much slope is required on a drainage pipe — and when I lay it, how much should it fall?Drain pipe fall →
- § 14How many m³ or tons of compost should I apply to a bed or grass area to improve soil structure and humus content?Compost & soil improvement — dosage →
- § VHow do I go from measurement to a finished paving with correct layer build-up, material quantities, stone count and slope — all on one page?Full guide: coating from start to finish →
Step V — Directory
The guided workflow: answer step by step on measurement, use, stone and fall and get the complete surface spec brought together in one flow.
Step A — Measurement & planting
Measure up the area, and work out the number of plants for the bed and hedge from the plant spacing and bond.
Step B — Soil & base layer
Work out the topsoil and gravel volume: growing layer, base course, settlement, compaction and tonnes to order.
Step C — Surfacing & fall
Count tiles and paving stones, and convert fall between per mille, percent and cm/m.
Step D — Grass & fertiliser
Dose grass seed and fertiliser by area — guideline doses you can adjust yourself.
Tools that work in all subjects
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