Rebar Weight Calculator – Estimate the Weight of Reinforcing Bars

Now you can easily calculate the weight of rebar used on construction site using this simple and advanced rebar weight calculator.

Rebar Calculator Use:

The procedure for using this calculator to calculate rebar weight is very simple. The steps to do so are as follows:

• There is no need to measure the dimensions of the rebar because standard sizes of rebars are available in market.
• Simply enter the rebar’s diameter and length as instructed by the structural engineer. Make sure to enter the bar’s diameter in millimetres.
• Skip the quantity field if you only want to calculate the weight of a single rebar.
• Enter the number of bars in the quantity field if you want to estimate the rebar weight in combos.
• The results will be displayed in kg and kg/m.

Standard Sizes & Weight Chart of Rebar (Reinforcing Bars)

The standard sizes of reinforcing bars as per Indian Standard which are available in the market are as follows:

The standard sizes of reinforcing bars as per ASMT are as follows:

What are Different Grades of Rebar?

Reinforcement bars, also know as rebar, are the most important part of any concrete structure, Rebars are used in concrete structures to provide the required tensile strength to withstand the stress produced by various forces and loads acting upon the structure. The rebars are generally categorized into different grades.

The term ‘grade’ in rebar means the minimum yield strength that rebar must possess. The yield strength of rebar is measured in megapascals (MPa) or pounds per square inch (psi). Different concrete projects such as buildings, bridges, infrastructure require different grades of reinforcement according to the need and suitability of that specific project.

The grades of rebar are standardized by government bodies to ensure consistent quality and safety. Different countries may have different codes in which they shall have different grading system of rebar.

Below we have listed the grades of rebars from two major organizations, Bureau of Indian Standards (BIS) and American Society for Testing and Materials (ASTM).

Indian Standard Rebar Grades (IS 1786:2008)

In india, the rebar grades are defined by IS 1786:2008, which calssified high-yielding strength deforming steel bars based on their minimum yield strength. The following are the grades of reinforcement specified in this standard code:

Note: For newcomers who are not familiar with the terms of different grades, Fe 400: “Fe” stands for “ferrous” (iron-based alloy), and “400” indicates the yield strength of 400 N/mm² (or 400 MPa). The word “ferrous” is derived from the Latin word “ferrum,” which means iron, and the chemical symbol for iron is Fe.

• Fe 415: Being the first in the list, this grade has minimum yield strength, hence it is commonly used for residential and commercial buildings. Good balance between ductility and strength make it suitable for general construction.
• Fe 415D and Fe 415S: These are advanced and specialized versions of Fe 415. These grades or rebars provide higher ductility and elongation than normal Fe 415 grade bar. Fe 415S is specifically designed for construction in seismic zones, where the ability of the rebars to absorb energy during earthquake is critical.
• Fe 500: Fe 500 rebar is stronger than its predecessor Fe 415. This grade is commonly used in multi-storey buildings and infrastructure projects.
• Fe 500D and Fe 500S: Similar to Fe415, these grades are the advacnec versions of Fe 500 grade and mainly provide better strength and enhanced properties than Fe 500. They can also be used in seismic zones.
• Fe 550: This grade provides high yield strength hence it is used in big and heavy construction projects such as bridges, industrial buildings, etc, where high strength is required.
• Fe 550D: Advanced and enhanced version of its predecessor Fe 550, which offers enhanced strength and ductility.
• Fe 600: This is the highest grade in the Indian Standard with the minimum yield capacity of 600 N/mm2 or MPa. This is mainly used for the highly stressed structures such as dam, skyscrapers, specialized infrastructure projects, etc.

American Standard Rebar Grades (ASTM A615)

In United States, the rebar grades are defined by ASTM A615, which classifies rebars based on their minimum yield strength. The following are the grades of reinforcement specified in this standard code:

Note: For newcomers who are not familiar with the terms of different grades specified as per ASTM A615, In “Grade 40”: “40” stands for minimum yield strength of “40,000 pounds per square inch (psi)”. Similarly, for “Grade 60”, the minimum yield strength is 60,000 psi.

• Grade 40: This grade corresponds to a minimum yield strength of 40,000 psi (275 MPa). This grade of rebar is used in light construction applications where the demands on the rebar are relatively low.
• Grade 60: The most commonly used grade in the USA, Grade 60 has a minimum yield strength of 60,000 psi (415 MPa). This rebar grade is widely used in residential, commercial, and infrastructure projects due to its strength and versatility. Grade 60 rebar is roughly equivalent to the Fe 415 grade in the Indian standard.
• Grade 75: With a minimum yield strength of 75,000 psi (520 MPa), Grade 75 is used in construction projects where higher strength is required. This grade is often chosen for larger structures, such as bridges and high-rise buildings.
• Grade 80, Grade 100 and Grade 120: These higher grades provide even greater yield strengths of 80,000 psi (550 MPa), 100,000 psi (690 MPa), and 120,000 psi (830 MPa) respectively. These grades are used in specialized construction projects where exceptional strength is necessary, often in industrial or seismic applications.

Rebar Weight Calculation Formula

You can also calculate the weight of rebars manually on the site, but we recommend you to use this calculator. The weight of rebar can be easily calculated by using this standard formula mentioned below:

Where ‘D’ and ‘L’ are the diameter and the length of the rebar respectively. Take the value of diameter in terms of millimeter and length in terms of meters. You will get the results in kilograms (Kg). After dividing the results with the actual length of rebar you can get the weight per meter run.

Also Try : ft to meter Conversion (Best Converter for Feet to Meters)
Also Try : cm to meter Conversion (Best Converter for Centimeters to Meters)

Let us understand this formula by simple example.

How to Calculate Rebar Weight in Kilogram Per Meter (Kg/m)?

Example : Calculate the weight of TMT Bar having diameter of 8 mm and length 12 meter.

Solution : Using the rebar weight calculation formula you can find the mass of TMT rod by putting the mentioned values in the given formula.

W= (D²/162.28)* L 
W= ( 8²/162.28)*12 = 4.732 Kg

Now calculate the weight per meter,

W = 4.732/ L
W = 4.732/ 12 = 0.395 Kg/m

The total weight of TMT bar with diameter 8 mm and length 12 meter is 4.732 kg and 0.395 kg/m.