If you are on iphone, the total steps converted to Sweatcoins and total number of Sweatcoins created is shown on your profile page, as highlighted in red on the screenshot below.
Unfortunately, I don’t think the Android version displays all the information. It is a bit of a shame because I know that for me personally, this is most likely the most useful page of the app as it shows the converted totals as well as the average number of daily steps over the past 7 days as well as a daily average over the past month. I only wish it would display the total verified steps rather than only the total steps that have been converted and have actually been issued as Sweatcoins.
If I had saved up my Sweatcoins, I think that most likely with 18,773sec from converted steps plus the extras through daily bonuses etc. over the past 3 years, I would have passed the magical 20,000swc. Although I have purchased a few marketplace offers, I tend to donate a majority of coins to the various crowdfunding to show support for the charity causes.