# Calculate precision

**URL:** <https://discourse.julialang.org/t/calculate-precision/7484>\
**Category:** General Usage\
**Created:** [December 3, 2017, 10:57pm UTC](https://discourse.julialang.org/t/calculate-precision/7484 "2017-12-03T22:57:40Z")\
**Posts on this page:** 1\
**Showing post:** 6

<div class="post-metadata">

**Author:** ![stevengj](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stevengj/32/71_2.png) [@stevengj](https://discourse.julialang.org/u/stevengj)\
**Post date:** [December 4, 2017, 12:48am UTC](https://discourse.julialang.org/t/calculate-precision/7484/6 "2017-12-04T00:48:09Z")

</div>

> [@Diger](#):
>
> How big is then my full number in bits (sign + exponents)

The default exponent range, which I think is compiled into MPFR and cannot easily be changed in Julia, is so large as to be effectively infinite for most purposes. (I think it is around 62 bits.)

---

_[View the full topic](https://discourse.julialang.org/t/calculate-precision/7484)._