Ishita Goyal
Meerut Institute of Engineering and Technology (MIET), Meerut
Ishita Goyal has created this Calculator and 100+ more calculators!
Himanshi Sharma
Bhilai Institute of Technology (BIT), Raipur
Himanshi Sharma has verified this Calculator and 500+ more calculators!

2 Other formulas that calculate the same Output

Specified compressive strength of concrete when total horizontal shear is given
28 day compressive strength= (2*Horizontal Shearing Stress)/(0.85*Actual area of effective concrete) GO
28-Day Concrete Compressive Strength when Water Cement Ratio is Given
28 day compressive strength=(2700*water cement ratio)-760 GO

28-Day Concrete Compressive Strength Formula

28 day compressive strength=7 day compressive strength+(30*(7 day compressive strength^(1/2)))
S<sub>28=S<sub>7+(30*(S<sub>7^(1/2)))
More formulas
28-Day Concrete Compressive Strength when Water Cement Ratio is Given GO
Water Cement Ratio when 28-Day Concrete Compressive Strength is Given GO
Modulus of Elasticity for Normal Weight Concrete GO
Modulus of Elasticity GO

What is compressive strength?

Compressive strength is defined as the strength of the concrete below which not more than 5% of the test results are expected to fall.

How to Calculate 28-Day Concrete Compressive Strength?

28-Day Concrete Compressive Strength calculator uses 28 day compressive strength=7 day compressive strength+(30*(7 day compressive strength^(1/2))) to calculate the 28 day compressive strength, The 28-Day Concrete Compressive Strength formula is given in terms of the characteristic compressive strength of 150mm size cubes tested at 28 days as per the Indian standards. . 28 day compressive strength and is denoted by S28 symbol.

How to calculate 28-Day Concrete Compressive Strength using this online calculator? To use this online calculator for 28-Day Concrete Compressive Strength, enter 7 day compressive strength (S7) and hit the calculate button. Here is how the 28-Day Concrete Compressive Strength calculation can be explained with given input values -> 1.03 = 1000000+(30*(1000000^(1/2))).

FAQ

What is 28-Day Concrete Compressive Strength?
The 28-Day Concrete Compressive Strength formula is given in terms of the characteristic compressive strength of 150mm size cubes tested at 28 days as per the Indian standards. and is represented as S28=S7+(30*(S7^(1/2))) or 28 day compressive strength=7 day compressive strength+(30*(7 day compressive strength^(1/2))). 7 day compressive strength is the strength of concrete after 7 days of using it.
How to calculate 28-Day Concrete Compressive Strength?
The 28-Day Concrete Compressive Strength formula is given in terms of the characteristic compressive strength of 150mm size cubes tested at 28 days as per the Indian standards. is calculated using 28 day compressive strength=7 day compressive strength+(30*(7 day compressive strength^(1/2))). To calculate 28-Day Concrete Compressive Strength, you need 7 day compressive strength (S7). With our tool, you need to enter the respective value for 7 day compressive strength and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate 28 day compressive strength?
In this formula, 28 day compressive strength uses 7 day compressive strength. We can use 2 other way(s) to calculate the same, which is/are as follows -
  • 28 day compressive strength=(2700*water cement ratio)-760
  • 28 day compressive strength= (2*Horizontal Shearing Stress)/(0.85*Actual area of effective concrete)
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