√42 =
√42
≈ 6.480741
Square root of 42 — 6.480741 (√42)
Irrational
The square root of 42 is about 6.480741, or exactly √42. It lies between 6 and 7.
- As a decimal
- ≈ 6.480741
- Simplified surd
- √42 = √42
- Between
- 6 < √42 < 7
- Squared
- 42² = 1764
- Cube root
- ∛42 ≈ 3.476027
Nearby numbers
From 1 to 200
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200
How to read this
- The decimal is rounded; the surd form is the exact value.
- Pulling out a square factor simplifies the surd — √50 = 5√2.
- If the number is not a perfect square, the decimal never ends (irrational).
- Knowing which two integers it sits between is enough to estimate in your head.
Frequently asked questions
Q. What is the square root of 42?
About 6.480741, or exactly √42.
Q. Can the surd be simplified?
No — there is no square factor to pull out.
Q. Between which integers does it fall?
Between 6 and 7.
Q. What is the cube root of 42?
About 3.476027.