diff --git a/ChangeLog.md b/ChangeLog.md
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+++ b/ChangeLog.md
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+# Changelog for hrfsize
+
+## Unreleased changes
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
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+Copyright Dias Kozhabay (c) 2019
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Dias Kozhabay nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
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+# hrfsize
+
+## Simple Haskell library for determining size of file in human readable format
+
+
+Example:
+
+```haskell
+
+import System.HrfSize (determineFileSize)
+
+main :: IO ()
+main = determineFileSize "/path/to/file" >>= print
+
+```
diff --git a/Setup.hs b/Setup.hs
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+++ b/Setup.hs
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+import Distribution.Simple
+main = defaultMain
diff --git a/hrfsize.cabal b/hrfsize.cabal
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--- /dev/null
+++ b/hrfsize.cabal
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+cabal-version: 1.12
+
+name:           hrfsize
+version:        0.0.1
+description:    Simple Haskell library for determining size of file in human readable format
+synopsis:       File size in human readable format
+homepage:       https://github.com/librerush/hrfsize#readme
+bug-reports:    https://github.com/librerush/hrfsize/issues
+author:         Dias Kozhabay <librerush@tutanota.com>
+maintainer:     Dias Kozhabay <librerush@tutanota.com>
+license:        BSD3
+license-file:   LICENSE
+category:       System
+build-type:     Simple
+extra-source-files:
+    README.md
+    ChangeLog.md
+
+source-repository head
+  type: git
+  location: https://github.com/librerush/hrfsize
+
+library
+  exposed-modules:
+      System.HrfSize
+  other-modules:
+      Paths_hrfsize
+  hs-source-dirs:
+      src
+  build-depends:
+      base >=4.7 && <5
+  default-language: Haskell2010
+
+test-suite hrfsize-test
+  type: exitcode-stdio-1.0
+  main-is: Spec.hs
+  other-modules:
+      Paths_hrfsize
+  hs-source-dirs:
+      test
+  ghc-options: -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      base >=4.7 && <5
+    , tasty
+    , tasty-hunit
+    , process
+    , hrfsize
+  default-language: Haskell2010
diff --git a/src/System/HrfSize.hs b/src/System/HrfSize.hs
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--- /dev/null
+++ b/src/System/HrfSize.hs
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+module System.HrfSize
+    ( determineFileSize,
+      FileSize(..),
+      convertSize
+    ) where
+
+import           System.IO (FilePath, IOMode (ReadMode), hFileSize,
+                            withBinaryFile)
+
+-- | IEC standard
+data FileSize = Bytes Double | KiB Double | MiB Double
+              | GiB Double | TiB Double
+  deriving (Show, Eq, Ord)
+
+convertSize :: Double -> FileSize
+convertSize size | size < 1024.0 = Bytes $ trunc size
+                 | size < 1024.0 ^ (2 :: Int) =
+                   KiB $ trunc $ size / 1024.0
+                 | size < 1024.0 ^ (3 :: Int) =
+                   MiB $ trunc $ size / 1024.0 ^ (2 :: Int)
+                 | size < 1024.0 ^ (4 :: Int) =
+                   GiB $ trunc $ size / 1024.0 ^ (3 :: Int)
+                 | otherwise =
+                   TiB $ trunc $ size / 1024.0 ^ (4 :: Int)
+  where
+    -- it's crazy method of truncating
+    trunc n | length (dropWhile (/= '.') $ show n) > 3 =
+      read parsePrecision :: Double
+            | otherwise = n
+      where
+        parsePrecision = let (a, b) = span (/= '.') $ show n in
+                             a ++ take 3 b
+
+-- | Determines file's size
+determineFileSize :: FilePath -> IO FileSize
+determineFileSize pathToFile = do
+  fileInt <- withBinaryFile pathToFile ReadMode hFileSize
+  let file = fromInteger fileInt :: Double
+  return $ convertSize file
diff --git a/stack.yaml b/stack.yaml
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--- /dev/null
+++ b/stack.yaml
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+# This file was automatically generated by 'stack init'
+#
+# Some commonly used options have been documented as comments in this file.
+# For advanced use and comprehensive documentation of the format, please see:
+# https://docs.haskellstack.org/en/stable/yaml_configuration/
+
+# Resolver to choose a 'specific' stackage snapshot or a compiler version.
+# A snapshot resolver dictates the compiler version and the set of packages
+# to be used for project dependencies. For example:
+#
+# resolver: lts-3.5
+# resolver: nightly-2015-09-21
+# resolver: ghc-7.10.2
+#
+# The location of a snapshot can be provided as a file or url. Stack assumes
+# a snapshot provided as a file might change, whereas a url resource does not.
+#
+# resolver: ./custom-snapshot.yaml
+# resolver: https://example.com/snapshots/2018-01-01.yaml
+resolver: lts-13.21
+
+# User packages to be built.
+# Various formats can be used as shown in the example below.
+#
+# packages:
+# - some-directory
+# - https://example.com/foo/bar/baz-0.0.2.tar.gz
+# - location:
+#    git: https://github.com/commercialhaskell/stack.git
+#    commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+# - location: https://github.com/commercialhaskell/stack/commit/e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+#  subdirs:
+#  - auto-update
+#  - wai
+packages:
+- .
+# Dependency packages to be pulled from upstream that are not in the resolver
+# using the same syntax as the packages field.
+# (e.g., acme-missiles-0.3)
+# extra-deps: []
+
+# Override default flag values for local packages and extra-deps
+# flags: {}
+
+# Extra package databases containing global packages
+# extra-package-dbs: []
+
+# Control whether we use the GHC we find on the path
+# system-ghc: true
+#
+# Require a specific version of stack, using version ranges
+# require-stack-version: -any # Default
+# require-stack-version: ">=1.9"
+#
+# Override the architecture used by stack, especially useful on Windows
+# arch: i386
+# arch: x86_64
+#
+# Extra directories used by stack for building
+# extra-include-dirs: [/path/to/dir]
+# extra-lib-dirs: [/path/to/dir]
+#
+# Allow a newer minor version of GHC than the snapshot specifies
+# compiler-check: newer-minor
diff --git a/test/Spec.hs b/test/Spec.hs
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--- /dev/null
+++ b/test/Spec.hs
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+import           System.HrfSize
+import           Test.Tasty
+import           Test.Tasty.HUnit
+
+main :: IO ()
+main = do
+  f1 <- determineFileSize "/tmp/file1"
+  f2 <- determineFileSize "/tmp/file2"
+  defaultMain (tests [f1, f2])
+
+-- | Creating files using
+-- `head -c size /dev/urandom > /tmp/fileN`
+tests :: [FileSize] -> TestTree
+tests files = testGroup "determineFileSize"
+  [ testCase "file1" $
+      MiB 1.95 @?= head files
+  , testCase "file2" $
+      Bytes 99.0 @?= head (tail files)
+  ]