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THE SUMFIZZ LIBRARY

Garden and landscaping calculators

Explore 25 free tools for garden and landscaping. Find topsoil quantity, mulch quantity, compost blend and more. Each calculator explains its inputs and method, with examples you can try using your own numbers.

THE SUMFIZZ LIBRARY

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25 calculators

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Topsoil quantity

Depth is converted to metres.

Garden and landscaping

Mulch quantity

One square metre covered to one centimetre deep is ten litres.

Garden and landscaping

Compost blend

Volume ratios do not establish chemical nutrient balance.

Garden and landscaping

Gravel quantity

Use the supplier bulk density.

Garden and landscaping

Raised-bed soil

Uses internal bed dimensions and uniform fill depth.

Garden and landscaping

Plant spacing

A square grid with half-spacing margins around the bed.

Garden and landscaping

Seed quantity

Use the product rate for your seed and application method.

Garden and landscaping

Turf rolls

Allows the entered waste percentage before rounding up to whole rolls.

Garden and landscaping

Paving slabs

An area-based count without reducing for joints.

Garden and landscaping

Paver base

The compaction allowance is entered by you and varies with the material.

Garden and landscaping

Edging blocks

Curves and corners may need additional pieces or cuts.

Garden and landscaping

Tree spacing

Assumes a rectangular grid including endpoints after setbacks.

Garden and landscaping

Irrigation runtime

One millimetre over one square metre is one litre.

Garden and landscaping

Drip-line flow

Uses the stated emitter flow, which can vary with water pressure.

Garden and landscaping

Rainwater harvest

Does not account for overflow, first-flush diversion or event timing beyond the entered efficiency.

Garden and landscaping

Water-butt fill time

Assumes constant inflow and no simultaneous use.

Garden and landscaping

Pond volume

Rectangular plan with an average depth.

Garden and landscaping

Pond liner dimensions

Adds twice the depth plus an allowance at each edge.

Garden and landscaping

Garden path area

Uses rectangular segments.

Garden and landscaping

Stepping-stone layout

Places full stones with equal gaps between stones only.

Garden and landscaping

Retaining-wall block quantity

Face-area count only.

Garden and landscaping

Landscape gradient

Measure horizontal distance, not the distance along the slope.

Garden and landscaping

Compost-bin capacity

A rectangular-bin capacity.

Garden and landscaping

Greenhouse cover area

Gable-ended greenhouse including walls and roof, excluding floor.

Garden and landscaping

Garden material delivery cost

Discount applies to materials before adding delivery.

Garden and landscaping