Updated at: 13-06-2022 - By: Sienna Lewis

Fertilizer can be measured in a variety of ways, taking into account factors such as rate of application and nutritional content. It’s important to keep in mind that the quantity of fertilizer you use is just as important as the quality when it comes to growing a healthy garden. When determining how much fertilizer you’ll need, there are a number of considerations to keep in mind.

You won’t be able to get the desired results from fertilizing if you apply it in the wrong amount. Furthermore, the New Mexico State University advises that you test your soil first in order to decide or manufacture the right fertilizer for your plant or location. You can get the most out of fertilizer if you use the appropriate amount and type.

How To Measure Fertilizer For Beginners

Get the square footage of your area and fertilizer recommendations

Based on the area’s square footage, Utah State University calculates how much fertilizer you’ll need. What if the square footage of the location is difficult to obtain? In addition, the expansion contains formulas for various landscape shapes.

Best Guide On How To Measure Fertilizer - Krostrade

Soil testing is the next step after you have the square footage. In this method, you may be confident that you’re getting the right nutrients for your body. Remember that the equation provided by the extension uses these two factors. According to Oregon State University, the required amount of fertilizer is applied to per 100 square feet.

Consider the size of your garden, flowerbed, or field when determining how much fertilizer to use. Measurement tools, such as measuring cups, are more suited for smaller regions and can be used to convert the amount. It is crucial that you become familiar with fertilizer rates and nutrient content as well.

Measure the fertilizer application rate

First, a soil test must be done before any fertilizer can be used. In addition, remember to bear in mind the major nutrient requirements of your plants and crops. You can apply up to 0.2 pounds of nitrogen per 100 square feet, depending on your soil’s needs, and the phosphorus and potassium percentage of the fertilizer relies on that soil’s needs.

It is possible, however, that you have yet to grasp the formula that was given in the previous section. Divide the recommended amount of nutrients for your plants by the nutrient in the fertilizer to get the recommended amount of nutrients per square foot. Adding the weight of the fertilizer bag to the proportion of each nutrient gives you the total nutrient content.

Check out university extensions’ more detailed formulas as well.

Measure the fertilizer nutrient content

The nutritional content of fertilizer is also a significant component in determining its value. When it comes to this task, you’ll only need to do some simple math to get the answers you need. A 50-pound bag of 10-10-10 fertilizer, for example, can only be multiplied by 50 times. The nitrogen, phosphorus, and potassium (NPK) ratio is a series of numbers.

Before using fertilizer, you must determine its nutrient content and the proper dosage. Preventing problems like scorched roots and shoots can be as simple as following these fertilizer measurement instructions. Furthermore, if you apply fertilizer blindly, you may not be addressing any deficiencies.

nitrogen is what you’ll need to boost foliage growth, therefore it’s a good idea to think of these nutrients as a whole. When it comes to roots and flowering, phosphorus is the next NPK value. Potassium, last but not least, aids in plant health and disease resistance.

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So, if you see a 10-5-5 fertilizer, know that it contains a lot of nitrogen and should be used to promote lush vegetation. While a 5-10-5 fertilizer will help your plants flourish, the second number has a significant amount.

How To Apply Fertilizer

Fertilizer application can be done in a variety of ways, and if you’re working in a greenhouse, it may even be more convenient. In addition to providing a stable environment for growth, monitoring your plants for symptoms of potential problems allows you to address any issues as soon as you notice them. You don’t have to worry about being overwhelmed by all the possibilities.

Side-dressing and broadcasting are the three most common methods of fertilizer application. The most frequent application method for fertilizers is broadcasting, therefore if there isn’t a recommendation for another application method, just go with that. According to the name, broadcasting is just spreading fertilizer on the ground.

Side-dressing involves sprinkling fertilizer around the plants, whereas banding requires a trench to be dug and the fertilizer to be banded. To prevent burning, use caution while applying fertilizer to leaves using the second method. Some fertilizers, in particular, must be incorporated into the soil before they can be used.

How to Calculate the Amount of Fertilizer Needed for Your Lawn

Lawn fertilizer dosages are typically specified in pounds of nitrogen per 1,000 square feet. These numbers can be tricky for home gardeners to convert to the amounts needed for their particular grade of nitrogen fertilizer and the size of their lawn. To help you determine how much fertilizer you need for your lawn, this fact sheet includes conversion tables and examples.

Step 1

Calculate the nitrogen content of your fertilizer to get an idea of how much to apply in pounds. On the fertilizer bag, you’ll see this information. The first number in a three-number series on a fertilizer bag is always nitrogen.

Step 2

Based on the proportion of nitrogen in your fertilizer and your fertilizer advice, decide how many pounds of fertilizer to apply. According to Table 1, you’ll need between 1 and 46 pounds of nitrogen-containing material.

Example 1

For every 1,000 square feet of grass, one pound of nitrogen or a mix of nitrogen and phosphorus fertilizer is advised, and your particular fertilizer includes 20% nitrogen. The five pounds of fertilizer per 1,000 square feet can be calculated using Table 1.

Example 2

For a 1,000-square-foot area, it is advised that you apply two pounds of fertilizer nitrogen per 1,000 square feet. Per 1,000 square feet of lawn, use 10 pounds of fertilizer (five pounds from the table multiplied by the two pound recommendation).

* One pound of nitrogen per 1,000 square feet is typically recommended when using a soluble inorganic nitrogen fertilizer. Nutrients are delivered over a longer period of time with slow-release fertilizers such as natural organics or synthetic controlled release formulations, allowing for larger application rates.

Step 3

The final step is to figure out how many square feet of lawn you have. For a rectangular lawn (see Figure 1), multiply the length and width of the grass (in feet). Calculate the area of a triangle by multiplying the base by the height and then dividing by two (see Figure 2). The total area of your lawn can be calculated by dividing it into sections and then adding up the totals.

Step 4

Your lawn size and fertilizer recommendation from Step 2 must be multiplied to get your final lawn size and fertilizer recommendation. Not including areas covered by sidewalks, driveways, or other non-turf surfaces will result in an underestimation of the actual amount of lawn fertilizer needed.

Example 1

The amount of fertilizer required for a 1,000-square-foot lawn is 25 times greater than the amount required for a 25,000-square-foot grass. In order to apply five pounds of 20 percent nitrogen fertilizer per 1,000 square feet on a 25,000-square-foot lawn, you need 125 pounds of fertilizer.

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Step-By-Step Example

The example below shows you how to calculate the amount of fertilizer needed for a normal lawn based on the recommended amount of fertilizer and the size of the lawn.

Step 1

The nitrogen content of your fertilizer is 25 percent, as you deduce from the bag.

Step 2

For every 1,000 square feet of land, you propose applying two pounds of nitrogen fertilizer. Table 1 shows this. To get one pound of nitrogen per 1,000 square feet from a 25 percent nitrogen fertilizer, four pounds of fertilizer should be applied. Four pounds of fertilizer per 1,000 square feet multiplied by two pounds (the fertilizer recommended) equals eight pounds per 1,000 square feet.

Step 3

Determine your lawn’s size by combining the area of all three lawns. Only the front and rear lawns are included in this illustration.

To put it another way, the front lawn is a total of 5,000 sq ft.


20,000 square feet in the back yard: 200 ft x 100 ft.

Step 4

Your 25,000-square-foot lawn requires 25 times as much fertilizer as the 1,000-square-foot grass on the chart, so multiply that by 25.

Adding eight pounds of fertilizer to your lawn times 25 equals 200 pounds of fertilizer.


If you don’t test your soil and figure out what your plants need, the fertilizer won’t do you any good. Aside from that, it’s important to know how much fertilizer to use and how much nutrient content your plants need. There are a variety of calculations and conversions you may use to determine how much fertilizer you need in your location.

If you know exactly how much, when, and what kind of fertilizer you’re using, you can avoid unnecessary burning and deficiency. Calculations before to application will also help you get the most out of the product.