Tether USDt vs USDC
Tether USDt (USDT) is the larger of the two, worth 2.5× USDC's market cap as of 13 September 2026. Compare USDT and USDC on price, market cap, supply and performance below.
Tether USDt vs USDC
Lines are normalized to the % change from the start of the visible range, so coins with very different prices stay visually comparable.
| Metric |  USDT |  USDC |
|---|---|---|
| Price (USD) | $0.999716 | $0.999897 |
| Market cap | $183.46B | $74.27B |
| 24h volume | $38.08B | $5.65B |
| Market cap rank | #3 | #6 |
| 1h change | +0.01% | +0.01% |
| 24h change | -0.01% | -0.00% |
| 7d change | -0.03% | -0.01% |
| 30d change | +0.08% | +0.01% |
| All-time high | $1.32 | $1.043 |
| % from ATH | -24.26% | -4.13% |
| Circulating supply | 183.52B USDT | 74.28B USDC |
| Max supply | Uncapped | Uncapped |
| Listed exchanges | 20 | 20 |
Data as of 13 September 2026
How Tether USDt and USDC differ
Size. Market cap, not price, is what ranks these two against each other. Tether USDt carries the larger market cap of the pair — 2.5 times USDC's. A lower price per coin says nothing about which is the bigger asset, only that the supply is divided differently.
Supply. Compare circulating supply against max supply for each. The coin with most of its supply already issued faces less future sell pressure from unlocks and emissions than one still releasing.
Liquidity. 24-hour volume measured against market cap shows how actively each trades. Thin volume means wider spreads and sharper moves in both directions, whatever the market cap says.