Calculate unused AWS volume costs (assumes http://boto.cloudhackers.com/en/latest/getting_started.html#configuring-boto-credentials).

unused-volcount.py

import boto.ec2
from pprint import pprint

# https://aws.amazon.com/ebs/previous-generation/
# https://aws.amazon.com/ebs/details/

sizes = {
    u'standard' : {
        'count': 0,
        'rate': 0.05
        },
    u'gp2' : {
        'count': 0,
        'rate': 0.10
        },
    u'io1' : {
        'count': 0,
        'rate': 0.125
        },
    u'st1' : {
        'count': 0,
        'rate': 0.045
        },
    u'sc1' : {
        'count': 0,
        'rate': 0.025
        }
    }

if __name__ == '__main__':

    ec2 = boto.ec2.connect_to_region('us-east-1')

    for volume in ec2.get_all_volumes():
        if volume.status != u'in-use':
            sizes[volume.type]['count'] += volume.size

    total = 0
    for voltype in sizes:
        cost = sizes[voltype]['rate'] * sizes[voltype]['count']
        total += cost
        print 'type: {voltype}, monthly: ${cost}'.format(voltype=voltype, cost=cost)

    print 'total: {}'.format(total)