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Surd Form Calculator
To know if a number is surd or not, enter it in the surd form calculator.
Table of Contents:
Surds calculator/simplifier is a mathematical tool related to roots. It is devised to tell if a root is surd or not.
How to use the surd calculator?
Follow the steps written ahead to use this tool.

Input the root value e.g 4√.
 Input the number e.g √78.
 Press “Enter”
The calculator will tell the result. Reset the tool to use again.
What is a surd?
Such a whole number, which when solved for its under root, does not give an exact value. For example:
In other words, surds are such square roots that give irrational decimal values on simplifying.
How to identify the surds?
To identify the surd numbers you need to simplify them. If a root on simplification gives a rational number then it is not a surd and vice versa.
You can use the surd form calculator to avoid simplification.
Example:
Tell whether these numbers are surds or not.
√35, √50, 5√243
Solution:
 √35 = 5.9160… (irrational) so it is a surd.
 √50 = 7.0710… (irrational) it is a surd.
 5√243 = 3 (rational) it is not a surd.
See more surd examples in the table below.
Number  Simple form  Decimal form  Is it Surd? 
√2  √2  1.4142135...  Surd 
√3  √3  1.7320508...  Surd 
√4  2  2  Not a surd 
√¼  ½  0.5  Not a surd 
3√11  3√11  2.2239800...  Surd 
3√27  3  3  Not a surd 
5√3  5√3  1.2457309...  Surd 