About Place Calculator: Free Landscape Calculators

Why we built Place Calculator

Anyone who has worked on a garden or a landscaping job knows the moment. The bed is measured, the material is chosen, and then comes the question that decides the budget: how much do we actually order?

The answer is rarely simple. Garden centers sell mulch by the bag, suppliers deliver gravel by the ton, topsoil is quoted in cubic yards and many product labels list litres. Converting between them by hand is slow, and small mistakes are expensive. Order too little and you lose a day waiting for a second delivery. Order too much and you pay for material that ends up in a pile behind the shed.

Place Calculator was built to take that guesswork away. We turn simple measurements into the units suppliers actually sell, so you can price a job, compare bulk with bags and order with confidence.

What can I calculate here?

We cover more than 40 materials and project types, grouped the way people plan a job:

Landscaping materials: gravel, pea gravel, river rock, sand, stone, topsoil, garden soil, compost, mulch, bark and more, in cubic yards, tons and bags.

Garden and planting: plant, tree, hedge and bulb spacing, seed counts, garden beds and potting mix for containers.

Landscaping projects: retaining walls, French drains, landscape fabric, edging, pond volume, irrigation and fertilizer.

Every calculator works in US and metric units, and you can switch between them without losing what you typed.

How is each calculator built?

Every calculator starts with the geometry of the job: the area or volume you are filling. We then apply the details that make the answer useful in real life, such as material density, how much a layer settles and the size of the bags sold in stores.

Recommended depths and rates come from published guidance, mainly university extension services, so the starting values are realistic.

Unit conversions use standard factors, the same ones published by the US National Institute of Standards and Technology.

Assumptions such as settling, waste and compaction are shown on the page and can be switched off or changed.

Each page explains the formula with a worked example, so you can check the math yourself.

How do you check the results?

A wrong number means a second trip to the supplier, so every calculator is checked three ways before it goes live, and again whenever we change it.

Tested by people

We work through each calculator by hand with real measurements and compare the answer with a worked example on paper.

Reviewed by industry experts

Landscapers and material suppliers check depths, densities and bag sizes against what they use on real jobs.

Cross-checked with AI models

We run the formulas and unit conversions through several AI models to catch rounding slips and unusual inputs.

When a reader reports a number that looks off, we test that case, fix the calculator if needed and update the page.

Where do your numbers come from?

We base our default depths and rates on independent, published guidance. A few of the sources we rely on:

Illinois Extension recommends a settled mulch layer of 2 to 3 inches in landscape beds.

UF/IFAS Florida-Friendly Landscaping also advises a 2 to 3 inch layer of mulch on plant beds.

Nebraska Extension suggests 2 to 4 inches around trees and shrubs, and 1 to 2 inches around flowers and vegetables.

New Mexico State University Extension gives 4 inches as the minimum soil depth under a lawn, with 6 inches or more for deeper roots.

NIST Special Publication 811 lists the standard factors we use to convert between US and metric units.

Densities and bag sizes vary between suppliers and products, so our calculators use typical values and let you enter your own where it matters. For large orders, it is always worth confirming the figure with your supplier.

What can I expect from Place Calculator?

Free to use, with no sign-up and no paywall.

Your measurements stay in your browser. We do not store what you type into a calculator.

Plain language and clear units, with the formula shown on every page.

Corrections when something is wrong. Reported issues are checked and fixed.

Who is behind Place Calculator?

Place Calculator is created and maintained by Haali, who builds the calculators, writes the guides and reviews every update. The work is shaped by feedback from landscapers, gardeners, homeowners and the garden centers and suppliers who answer the same question every day: how much do I need?

Results are estimates based on the numbers you enter, so please read our terms of use before relying on them for large orders.

How can I get in touch?

Have an idea for a calculator, spotted a result that looks wrong or want to work with us? We would love to hear from you.