A summary of AWS pricing for basic computation, storage, and data transfer.

Prices are current as of 7/05/11.1CPUs are in terms of a 1-GHz Opteron 2007 processor, unless otherwise noted. For example, a machine with four 1-GHz processors would be listed as 4×1.1aCPU is a quad-core Xeon X5570, i.e., two quad-core CPUs, where each core is 4.19 GHz.1bCPU is a quad-core Xeon X5570, and instance includes two NVIDIA Tesla "Fermi" M2050 GPUs.2Costs reflect standard EC2 use with Linux OS. Costs increase when using Windows and decrease when using Reserved Instances (up-front payment) or Spot Instances (user-specified price on unused EC2 capacity).3Within same AWS availability region (e.g., AWS US-East).4Request costs are more difficult to estimate, and are usually more pertinent when databases and other similar services are involved. Programs like IOSTAT can be used to estimate EBS requests.