Navigate to your Profile and you would be able to see a subscription link as shown in the picture below.
Once you click on Subscription, you would be able to see all your plan details including characters used and total conversion characters left and your recent invoices.
Over the Subscription page, you can also check all your Active plans by clicking on the 'Subscribed plan details' link located below the 'Topup' button.
The Subscription page offer your complete information and for extra transparency, you can also view all your usage history over the 'Usage Details' button in the 'Usage Overview' section.