Stablecoins from Polygon PoS to Ethereum: USDT Polygon → USDC ERC20

Today USDT Polygon goes for 1.0009 USDC ERC20, and USDC ERC20 goes for 0.999088 USDT Polygon. Market over 24 hours: USDT Polygon against USDC ERC20 plus 0.01%. The week added a move of 0%.

The weekly corridor ran from 0.999555 to 0.999993 USDC ERC20, a spread of 0.04%. A single order takes 100 to 10,000,000 USDT Polygon. In dollars that is roughly $99.92.

The payout leaves in the Ethereum (ERC20) network, so the receiving address has to belong to that network. By market cap Tether sits 3th ($183.29 B) and USD Coin 6th ($73.84 B). Daily moves of USDT and USDC over 90 days line up at 0.15 (they travel apart).

Who takes the USDT Polygon → USDC ERC20 route

A road both waysThe USDC ERC20 → USDT Polygon direction is open too, so going back into USDT takes the same route.

USDT Polygon → USDC ERC20 rate and amounts

1 USDT Polygon = 1.0009 USDC ERC20

1 USDC ERC20 = 0.999088 USDT Polygon

Send USDT Polygon — receive USDC ERC20

USDT Polygon	USDC ERC20
100	100.0913
500	500.4564
2,000	2,001.83
5,000	5,004.56
20,000	20,018.26
100,000	100,091.28

Need USDC ERC20 — send this much USDT Polygon

USDC ERC20	USDT Polygon
200	199.8176
1,000	999.088
2,000	1,998.18
10,000	9,990.88
20,000	19,981.76
100,000	99,908.8

Payout network for USDC

The same USDC goes out in several networks. Rates and lower limits differ, and the fee is charged by the network itself.

Network	Per USDT Polygon	From	Network fee	Speed
Polygon	0.997295	100 USDT Polygon	≈ $0.0018	fast
Solana	1.0009	100 USDT Polygon	≈ $0.00053	fast
Ethereum (ERC20) open now	1.0009	100 USDT Polygon	≈ $0.022	medium
Arbitrum One	0.999201	—	≈ $0.0033	fast
BASE	0.999201	—	—	—
BNB Smart Chain (BEP20)	0.999201	—	≈ $0.0024	fast
Avalanche C-Chain	0.999201	—	≈ $0.00012	fast
NEAR	0.999201	—	—	—
Optimism	0.999201	—	≈ $0.00017	fast
XLM	0.999201	—	—	—

USDC network fees

How the USDT Polygon → USDC ERC20 order runs

Work out the amount in the calculator: orders start at 100 USDT Polygon.
Enter a USDC address in Ethereum (ERC20) and a way to reach you.
Send USDT Polygon in Polygon for exactly the amount stated in the order.
Once the network confirms your transfer, USD Coin leaves for your address. The order page tracks every step.

Swap USDT Polygon for USDC ERC20

Check this before sending USDT Polygon

The address network is Ethereum (ERC20). Sending through another network usually means losing the transfer.
The transfer must not be smaller than 100 USDT Polygon.
Copy the address whole, then compare the first and last characters after pasting.
Ethereum, Arbitrum, Optimism, BNB Smart Chain and Polygon all use the same address shape (0x…). Make sure the wallet is switched to Ethereum.
To move USDC on later, put a little ETH at the same address.
Coins go through an AML check: a flagged transfer can be held until the check is finished.

Polygon PoS against Ethereum

	Polygon PoS	Ethereum
Network type	Sidechain with checkpoints in Ethereum	Layer one (L1)
Fees are paid in	POL	ETH
Fee level	≈ $0.0018	≈ $0.022
Speed	fast	medium
Block	~2 sec	~12 sec
Address shape	0x…	0x…
Memo or tag	not needed	not needed
Ethereum-style address (0x…)	yes	yes

Fee and speed levels are comparative: both move with how busy the network is.

How this differs from a classic bridge

	RubyCash	Classic bridge
What lands at your address	USDC in Ethereum	The same stablecoin; turning USDT into USDC is a separate step
Wallet and signatures	Not needed: the coins go to the address from the order	Needed: connect the wallet and sign contract transactions
A coin for fees in Ethereum	Not needed to receive	Often needed, or the funds cannot be claimed or moved on
Timing	After confirmations in Polygon PoS; the order page tracks it	Depends on the bridge and the load of both networks
Who holds the funds meanwhile	RubyCash for the life of the order, with an AML check	The bridge contract or its validators

Bridge Polygon PoS → Ethereum: all directions The Ethereum network

Where the USDT Polygon to USDC ERC20 rate has been

WeekMonthQuarterYear

high 0.999993 USDC ERC20low 0.999555 USDC ERC20

Sep 11, 2026 12:06Sep 18, 2026 12:06

high 1.0002 USDC ERC20low 0.999642 USDC ERC20

Aug 19, 2026 03:00Sep 18, 2026 03:00

high 1.0002 USDC ERC20low 0.999327 USDC ERC20

Jun 20, 2026 03:00Sep 18, 2026 03:00

high 1.0017 USDC ERC20low 0.996801 USDC ERC20

Sep 19, 2025 03:00Sep 18, 2026 03:00

24 hours: +0.01%
Week: 0%
Weekly high: 0.999993 USDC ERC20
Weekly low: 0.999555 USDC ERC20
Spread: 0.04%

Market data from CoinGecko as of Sep 18, 2026 09:54; the exchange rate is calculated separately and differs. Where these numbers come from

How far USDT Polygon/USDC ERC20 travelled, by period

Period	High	Low	Middle	Net move
24 hours	0.999681	0.999555	0.999621	+0.01%
Week	0.999993	0.999555	0.999814	0%
Month	1.0002	0.999642	0.999917	0%
Quarter	1.0002	0.999327	0.999707	−0.01%

Figures are in USDC ERC20 per unit sent, from market data.

Daily USDT Polygon → USDC ERC20 rate

Day	Close	Against the day before
Sep 18, 2026	0.999642 USDC ERC20	0%
Sep 17, 2026	0.999675 USDC ERC20	0%
Sep 16, 2026	0.999723 USDC ERC20	−0.03%
Sep 15, 2026	0.999985 USDC ERC20	+0.01%
Sep 14, 2026	0.999848 USDC ERC20	−0.01%
Sep 13, 2026	0.999949 USDC ERC20	0%
Sep 12, 2026	0.999966 USDC ERC20	+0.02%

Daily RubyCash rate: USDT Polygon → USDC ERC20

Date	RubyCash rate	Market rate
Sep 18, 2026	1.0009 USDC ERC20	0.999652
Sep 17, 2026	1.0009 USDC ERC20	0.999663
Sep 16, 2026	1.0012 USDC ERC20	0.999666

Our own rate is written down every hour; the table keeps the last entry of each day. The market column is the ratio of the same two coins on CoinGecko at that moment. Where these numbers come from

The numbers on USDT and USDC

Tether USDT

Price: $0.999188
24 hours: 0%
Week: 0%
Market cap: $183.29 B
24-hour turnover: $56 B
Rank by cap: #3
In circulation: 183.44 B USDT
Record price: $1.32

USD Coin USDC

Price: $0.999536
24 hours: −0.01%
Week: 0%
Market cap: $73.84 B
24-hour turnover: $16.11 B
Rank by cap: #6
In circulation: 73.87 B USDC
Record price: $1.04

Source: CoinGecko, Sep 18, 2026 09:54.

Tether against USD Coin

	Tether (USDT)	USD Coin (USDC)
Ticker	USDT	USDC
Type	token	token
Network	Polygon	Ethereum (ERC20)
Fees are paid in	POL	ETH
Launched	2014	2018
Built by	Tether Limited	Circle
Supply cap	no cap	no cap
In circulation	183.44 B USDT	73.87 B USDC
Market cap	$183.29 B	$73.84 B
Rank by cap	#3	#6

Daily moves of USDT and USDC over 90 days line up at 0.15 — they travel apart.

Common questions: USDT Polygon → USDC ERC20

What rate does USDT Polygon to USDC ERC20 run at?

As of Sep 18, 2026 12:03 it is 1 USDT Polygon = 1.0009 USDC ERC20. The figure recalculates on its own, and the calculator always shows the fresh one. In dollars that is around $1.00.

What amounts does USDT Polygon → USDC ERC20 accept?

From 100 to 10,000,000 USDT Polygon per order. The lower limit is roughly $99.92.

Where does the 100 USDT Polygon floor come from?

Network fees and order handling eat a small transfer alive — below 100 USDT Polygon the swap stops making sense for either side.

What else is taken on top of the rate?

The payout is already calculated at the rate in the calculator. On top of it you only pay the network fee for sending USDT Polygon, and that one goes to the blockchain, not to us.

How long does USDT Polygon to USDC ERC20 take?

The clock starts with confirmations: the order goes into work once Polygon confirms your transfer. After that it comes down to how busy the network is. A block in Polygon closes in about 2 sec.

Will native USDC arrive, or a wrapper?

USDC ERC20 is the standard USDC token in Ethereum — exactly what exchanges send when they withdraw into this network.

Do I need ETH to receive USDC ERC20?

Not to receive. ETH comes into play later, when you want to send USDC from your address.

Which network will USDC ERC20 arrive in?

The payout leaves in Ethereum (ERC20). Make sure the receiving wallet works with that network.

Where is receiving USDC cheaper?

The cheapest is usually USDC Polygon, USDC SOL, USDC Arbitrum, USDC BEP20, USDC AVAX C, USDC Optimism. Still, the network is chosen by what the recipient supports, not by the fee.

What if the rate moves while I am paying?

The rate is pinned to the order and does not move while the order is alive. It can be recalculated if the payment arrives late or for a different amount — so send the exact sum, and send it promptly.

What did the USDT Polygon to USDC ERC20 rate do this month?

The month came in at a move of 0%. Low 0.999642, high 1.0002, middle 0.999917 USDC ERC20 per USDT Polygon.

Can I go back, USDC ERC20 to USDT Polygon?

Yes, the reverse direction is open: 1 USDC ERC20 = 1.0021 USDT Polygon. The link sits right under the calculator.