5 Best Free Online Soil Amendment Calculator Websites

Here is a list of best free online soil amendment calculator websites. Soil amendments are materials and composites added to soil to improve its chemical and biological properties for healthier plant growth. There are many types of soil amendments that are added to soil like organic matter (compost, leaf mold, manure), fertilizers, line, sulfur, gypsum, peat moss, and more. Before adding amendments to the soil, it is important to determine the quantity that needs to be added to the soil. If you also want to determine the soil amendment quantity, then check out these online soil amendment calculator websites.

These websites offer simple soil amendment calculators that use parameters like soil layer thickness, soil amount, garden shape, and area to amend to find out soil amendment quantity. Some of these websites also explain soil amendment and show the soil amendment calculation formula. A few websites also calculate the soil quantity using garden dimensions and shape. Plus, users can even purchase soil amendments on some of these websites. To help out users, I have included the necessary calculation steps in the description of each website.

These websites also offer additional features like Health calculators, Financial Calculators, Watering & Irrigation Tools, Food Gardening Tools, and more. Go through the list to learn more about these websites.

My Favorite Online Soil Amendment Calculator Website:

hawthornegc.com is my favorite website as it can calculate Grow and Bloom media amendment quantity. Plus, it only uses soil quantity to perform the calculation.

You can also check out lists of best free Online Gravel Calculator, Online Sod Calculator, andOnline Volumetric Weight Calculator websites.

Comparison Table:

Features/Website Names	Shows calculation formula	Can also calculate soil amount	Ony uses soil quantity as input
hawthornegc.com	x	x	✓
gardeners.com	x	✓	x
users.cse.umn.edu	x	x	x
calculator.academy	✓	x	x
savingwater.org	x	x	x

hawthornegc.com

hawthornegc.com is a free online soil amendment calculator website. This website offers a simple soil amendment calculator that helps users find out the amount of grow and bloom media amendment required in the soil. To do that, it only requires soil quantity as input. Plus, users can enter the soil quantity in multiple units namely quarts, gallons, cubic feet, and cubic yards. Based on the input soil quantity, it shows grow media amendment and bloom media amendment quantities in units like cups, quarts, gallons, pounds, etc. Now, follow the below steps.

How to calculate soil amendment online using hawthornegc.com:

Visit this website and access the Soil Amendment Calculator.
Now, enter the soil volume value.
Next, specify the soil volume unit.
Finally, view the calculated grow and bloom media amendment values.

Additional Features:

This website has handy tools like Power Usage Calculator, CO2 Flow Calculator, Ideal Air BTU Calculator, Soil Calculator, and more.

Final Thoughts:

It is one of the best free online soil amendment calculator websites that can calculate Grow and Bloom media amendment quantity based on soil volume.

Pros	Cons
Only uses soil volume to perform the calculation
Can calculate Grow and Bloom Media Amendment quantities

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gardeners.com

gardeners.com is a free online soil amendment calculator website. Using this website, users can calculate the amount of soil and fertilizers needed for their raised bed and elevated planter gardening. In its calculation, it also considers the shape (rectangle, square, or circle) and dimensions (length, diameter, width, etc.) of the garden. After performing the calculation, it shows soil quantity in the quarts unit and all-purpose fertilizer quantity in the cups unit.

This website also offers examples of soil amendment calculation examples. Plus, it offers steps and a video tutorial describing the process of recharging a raised bed garden. Now, follow the below steps.

How to calculate soil amendment online using gardeners.com:

Visit this website and access the Soil Calculator.
Now, choose either a Raised Bed or an Elevated Planter garden style.
Next, choose a garden shape (square, rectangle, or circle).
After that, enter the garden dimensions.
Finally, click on the Calculate button to view the soil and all-purpose fertilizer quantity.

Additional Features:

On this website, users can also browse and purchase various types of garden supplies and home & kitchen equipment.

Final Thoughts:

It is another good online soil amendment calculator website that helps users calculate soil and fertilizer requirements for gardening.

Pros	Cons
Can calculate both soil and all-purpose fertilizer quantity
Can perform calculations for both Raised Bed and Elevated Planter gardening

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users.cse.umn.edu

users.cse.umn.edu is another free online soil amendment calculator website. This website helps users calculate the volume of soil amendment in cubic yards using the area of coverage and depth of amendment values. Besides this, it can also be used to calculate depth of amendment and area of coverage values. However, it lacks information related to soil amendment. Now, follow the below steps.

How to calculate volume of soil amendment online using users.cse.umn.edu:

Go to this website using the given link.
After that, enter the area to be converted and the depth of soil amendment values.
Next, click on the Calculate button to view the volume of soil amendment in cubic yards.

Final Thoughts:

It is another simple online soil amendment calculator website through which users can calculate the volume of soil amendment.

Pros	Cons
Can also calculate the area of coverage and depth of soil amendment values

Home Page

calculator.academy

calculator.academy is another free online soil amendment calculator website. This calculator determines the soil amendment needed based on the area to be amended, the desired depth of amendment, and the amendment rate. It also explains soil amendment and shows the soil amendment formula. It even provides steps to perform soil amendment calculations to help out users. Now, follow the below steps.

How to calculate soil amendment online using calculator.academy:

Visit this website and access the soil amendment calculator.
After that, enter the amendment area, desired depth of amendment, and amendment rate.
Next, click on the Calculate button to view the soil amendment needed in cubic yards.

Additional Features:

This website has multiple online Financial, Maths, Science, Engineering, Health, and Fitness calculators.

Final Thoughts:

It is another good online soil amendment calculator website that also provides calculation steps.

Pros	Cons
Provides calculation steps
Shows calculation formula
Explains soil amendment

Home Page

savingwater.org

savingwater.org is the last free online soil amendment calculator website. Through this website, users can determine the amount of compost or soil amendment they need. To perform the calculation, it only required two input parameters namely the thickness of soil layer and the Area you want to amend (in square feet). After the calculation, it shows the compost or soil amendment amount in cubic foot bags, cubic feet, and cubic yards units. Now, check out the below steps.

How to perform soil amendment calculation online using savingwater.org:

Launch this website and access the Compost & mulch Calculator.
After that, specify the layer thickness and area to amend values.
Finally, click on the Calculate button to view the amount of soil amendment needed.

Additional Features:

This website offers information and tools related to watering & irrigation, fertilizers, food gardening, lawn care, weed control, and more.

Final Thoughts:

It is another good online soil amendment calculator that anyone can use without much hassle.

Pros	Cons
Only requires soil thickness and soil amendment area to perform the calculation

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Frequently Asked Questions

What are 4 soil amendments?

There are many different types of soil amendments but the four most common types of soil amendments are Compost, Manure, Lime, and Gypsum.

What is the best soil amendment for plants?

The best soil amendment for plants depends on the specific needs of your soil, the types of plants you're growing, and the existing soil conditions. There is no one-size-fits-all answer, as different amendments address different issues. Some of the common soil amendments that are used are Compost, Manure, Lime or Sulfur, cover crops, fertilizers, and gypsum.

What is the best soil amendment for acidic soil?

The best soil amendment for acidic soil is typically agricultural lime, specifically calcium carbonate or dolomitic lime. Lime is used to raise the pH of acidic soil, making it less acidic and more neutral. This process is also known as liming.

What is the difference between soil amendment and fertilizer?

Soil amendments and fertilizers are both used to improve soil quality and support plant growth, but they serve different purposes and have distinct characteristics: Soil amendments are materials added to soil to enhance its physical properties, structure, and overall health. They improve the soil's ability to support plant growth by enhancing aeration, water retention, and microbial activity. On the other hand, Fertilizers are substances added to soil or plants to supply essential nutrients, such as nitrogen (N), phosphorus (P), and potassium (K), as well as secondary and micronutrients. Fertilizers are used to promote plant growth and improve nutrient availability.

Why use a soil amendment?

Soil amendments are used to improve soil quality and provide an ideal environment for plant growth. They offer various benefits that can have a positive impact on both the soil and the plants:

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