With Amazon EBS, you only pay for what you use. The pricing for Amazon EBS volumes is listed below.
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EBS General Purpose SSD (gp2) Volumes
Volume storage for General Purpose SSD (gp2) volumes is charged by the amount you provision in GB per month, prorated to the hour, until you release the storage. I/O is included in the price of the volumes, so you pay only for each GB of storage you provision. For example, let's say that you provision a 2000 GB volume for 12 hours in a 30 day month. In a region that charges $0.10 per GB-month, you would be charged $3.33 for the volume ($0.10 per GB-month * 2000 GB * 12 hours / (24 hours/day * 30 day-month)).
EBS Provisioned IOPS SSD (io1) Volumes
Volume storage for EBS Provisioned IOPS SSD (io1) volumes is charged by the amount you provision in GB per month, until you release the storage. With Provisioned IOPS SSD (io1) volumes, you are also charged by the amount you provision in IOPS (input/output operations per second) multiplied by the percentage of days you provision for the month. For example, if you provision a volume with 1000 IOPS, and keep this volume for 15 days in a 30 day month, then in a Region that charges $0.10 per provisioned IOPS-month, you would be charged $50 for the IOPS that you provision ($0.10 per provisioned IOPS-month * 1000 IOPS provisioned * 15 days/30). You will be charged for the IOPS provisioned on a volume even when the volume is detached from an instance.
EBS Throughput Optimized HDD (st1) Volumes
Volume storage for Throughput Optimized HDD (st1) volumes is charged by the amount you provision in GB per month, prorated to the hour, until you release the storage. I/O is included in the price of the volumes, so you pay only for each GB of storage you provision. For example, let's say that you provision a 2000 GB volume for 12 hours in a 30 day month. In a region that charges $0.045 per GB-month, you would be charged $1.5 for the volume ($0.045 per GB-month * 2000 GB * 12 hours / (24 hours/day * 30 day-month)).
EBS Cold HDD (sc1) Volume
Volume storage for Cold HDD (sc1) volumes is charged by the amount you provision in GB per month, prorated to the hour, until you release the storage. I/O is included in the price of the volumes, so you pay only for each GB of storage you provision. For example, let's say that you provision a 2000 GB volume for 12 hours in a 30 day month. In a region that charges $0.025 per GB-month, you would be charged $0.83 for the volume ($0.025 per GB-month * 2000 GB * 12 hours / (24 hours/day * 30 day-month)).
EBS Snapshots
Snapshot storage is based on the amount of space your data consumes in Amazon S3. Because Amazon EBS does not save empty blocks, it is likely that the snapshot size will be considerably less than your volume size. For the first snapshot of a volume, Amazon EBS saves a full copy of your data to Amazon S3. For each incremental snapshot, only the changed part of your Amazon EBS volume is saved.
Copying EBS snapshots is charged for the data transferred across regions. After the snapshot is copied, standard EBS snapshot charges apply for storage in the destination region.
Looking for EBS Magnetic? See the Previous Generation Volume's page
*on this page GB = 1024^3 bytes
