Altogether vs. All together

Altogether (pronoun+adverb) means jointly; collectively at the same place or in the same time.

Usage note: All together is used only in sentences that can be rephrased so that all and together may be separated by other words.

• The guests arrived all together.
• All the guests arrived together.

• The old newspapers lay all together in a heap. 
• All the old newspapers lay together in a heap.

• Sam was most happy when we were all together.
• Sam was most happy when we all were together.

Altogether (adverb) means with everything included; entirely; with all counted; all told; on the whole; completely; totally; taking everything into consideration.

• I stopped visiting her house altogether.
• We collected altogether $1000.
• Altogether it was great day.