You can use AWS Cost Management APIs,
The Cost Explorer API allows you to programmatically query your cost and usage data. You can query for aggregated data such as total monthly costs or total daily usage. You can also query for granular data, such as the number of daily write operations for Amazon DynamoDB database tables in your production environment.
By GetCostAndUsage you can get estimated cost.for more information read the following documents on the AWS website:
https://docs.aws.amazon.com/aws-cost-management/latest/APIReference/API_GetCostAndUsage.html
https://docs.aws.amazon.com/aws-cost-management/latest/APIReference/Welcome.html
There is sample request:
POST / HTTP/1.1
Host: ce.us-east-1.amazonaws.com
x-amz-Date: <Date>
Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=contenttype;date;host;user-agent;x-amz-date;x-amz-target;x-amzn-requestid,Signature=<Signature>
User-Agent: <UserAgentString>
Content-Type: application/x-amz-json-1.1
Content-Length: <PayloadSizeBytes>
Connection: Keep-Alive
X-Amz-Target: AWSInsightsIndexService.GetCostAndUsage
{
"TimePeriod": {
"Start":"2017-09-01",
"End": "2017-10-01"
},
"Granularity": "MONTHLY",
"Filter": {
"Dimensions": {
"Key": "SERVICE",
"Values": [
"Amazon Simple Storage Service"
]
}
},
"GroupBy":[
{
"Type":"DIMENSION",
"Key":"SERVICE"
},
{
"Type":"TAG",
"Key":"Environment"
}
],
"Metrics":["BlendedCost", "UnblendedCost", "UsageQuantity"]
}
And response:
HTTP/1.1 200 OK
x-amzn-RequestId: <RequestId>
Content-Type: application/x-amz-json-1.1
Content-Length: <PayloadSizeBytes>
Date: <Date>
{
"GroupDefinitions": [
{
"Key": "SERVICE",
"Type": "DIMENSION"
},
{
"Key": "Environment",
"Type": "TAG"
}
],
"ResultsByTime": [
{
"Estimated": false,
"Groups": [
{
"Keys": [
"Amazon Simple Storage Service",
"Environment$Prod"
],
"Metrics": {
"BlendedCost": {
"Amount": "39.1603300457",
"Unit": "USD"
},
"UnblendedCost": {
"Amount": "39.1603300457",
"Unit": "USD"
},
"UsageQuantity": {
"Amount": "173842.5440074444",
"Unit": "N/A"
}
}
},
{
"Keys": [
"Amazon Simple Storage Service",
"Environment$Test"
],
"Metrics": {
"BlendedCost": {
"Amount": "0.1337464807",
"Unit": "USD"
},
"UnblendedCost": {
"Amount": "0.1337464807",
"Unit": "USD"
},
"UsageQuantity": {
"Amount": "15992.0786663399",
"Unit": "N/A"
}
}
}
],
"TimePeriod": {
"End": "2017-10-01",
"Start": "2017-09-01"
},
"Total": {}
}
]
}
For Java SDK check this page:
https://docs.aws.amazon.com/goto/SdkForJava/ce-2017-10-25/GetCostAndUsage
Also, the AWS Price List Service is helpful for resources you have not them already on your account, for example, if you want to create an AWS calculator.
GetProducts API gives you the full price information, and base on that you can calculate on your side.
Sample request GerProducts:
POST / HTTP/1.1
Host: api.pricing.<region>.<domain>
x-amz-Date: <Date>
Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=contenttype;date;host;user-agent;x-amz-date;x-amz-target;x-amzn-requestid,Signature=<Signature>
User-Agent: <UserAgentString>
Content-Type: application/x-amz-json-1.1
Content-Length: <PayloadSizeBytes>
Connection: Keep-Alive
X-Amz-Target: AWSPriceListService.GetProducts
{
"Filters": [
{
"Type": "TERM_MATCH",
"Field": "ServiceCode",
"Value": "AmazonEC2"
},
{
"Type": "TERM_MATCH",
"Field": "volumeType",
"Value": "Provisioned IOPS"
}
],
"FormatVersion": "aws_v1",
"NextToken": null,
"MaxResults": 1
}
and response:
HTTP/1.1 200 OK
x-amzn-RequestId: <RequestId>
Content-Type: application/x-amz-json-1.1
Content-Length: <PayloadSizeBytes>
Date: <Date>
{
"FormatVersion": "aws_v1",
"NextToken": "57r3UcqRjDujbzWfHF7Ciw==:ywSmZsD3mtpQmQLQ5XfOsIMkYybSj+vAT+kGmwMFq+K9DGmIoJkz7lunVeamiOPgthdWSO2a7YKojCO+zY4dJmuNl2QvbNhXs+AJ2Ufn7xGmJncNI2TsEuAsVCUfTAvAQNcwwamtk6XuZ4YdNnooV62FjkV3ZAn40d9+wAxV7+FImvhUHi/+f8afgZdGh2zPUlH8jlV9uUtj0oHp8+DhPUuHXh+WBII1E/aoKpPSm3c=",
"PriceList": [
"{\"product\":{\"productFamily\":\"Storage\",\"attributes\":{\"storageMedia\":\"SSD-backed\",\"maxThroughputvolume\":\"320 MB/sec\",\"volumeType\":\"Provisioned IOPS\",\"maxIopsvolume\":\"20000\",\"servicecode\":\"AmazonEC2\",\"usagetype\":\"CAN1-EBS:VolumeUsage.piops\",\"locationType\":\"AWS Region\",\"location\":\"Canada (Central)\",\"servicename\":\"Amazon Elastic Compute Cloud\",\"maxVolumeSize\":\"16 TiB\",\"operation\":\"\"},\"sku\":\"WQGC34PB2AWS8R4U\"},\"serviceCode\":\"AmazonEC2\",\"terms\":{\"OnDemand\":{\"WQGC34PB2AWS8R4U.JRTCKXETXF\":{\"priceDimensions\":{\"WQGC34PB2AWS8R4U.JRTCKXETXF.6YS6EN2CT7\":{\"unit\":\"GB-Mo\",\"endRange\":\"Inf\",\"description\":\"$0.138 per GB-month of Provisioned IOPS SSD (io1) provisioned storage - Canada (Central)\",\"appliesTo\":[],\"rateCode\":\"WQGC34PB2AWS8R4U.JRTCKXETXF.6YS6EN2CT7\",\"beginRange\":\"0\",\"pricePerUnit\":{\"USD\":\"0.1380000000\"}}},\"sku\":\"WQGC34PB2AWS8R4U\",\"effectiveDate\":\"2017-08-01T00:00:00Z\",\"offerTermCode\":\"JRTCKXETXF\",\"termAttributes\":{}}}},\"version\":\"20170901182201\",\"publicationDate\":\"2017-09-01T18:22:01Z\"}"
]
}
For more info read the following doc:
https://docs.aws.amazon.com/aws-cost-management/latest/APIReference/API_pricing_GetProducts.html
Finally, you can get the idea from AWS Cost calculator:
https://calculator.s3.amazonaws.com/index.html