astrina

Crypto exchange

Rates, reserves and limits from the exchangers themselves — plus our own check of each one against regulator lists and threat feeds.

rates from 09:11 UTC 657 exchangers 56254 directions
You send
You receive · best offer
BTC → Tether TRC20 (USDT) BTC → Tether ERC20 (USDT) BTC → Tether BEP20 (USDT) BTC → Ethereum (ETH) BTC → Litecoin (LTC) 1 BTC = 76 125.00 USDTPOLYGON at the best offer
No documents Fixed rate Automatic Takes my amount
83 of 176 exchangers 93 hidden by filters
#Exchanger You sendYou receive Reserve
1
Swappix best rate
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 40 mo in business
4.4787 BTC
no sending fee
340 941.26
USDTPOLYGON
758 291 USDTPOLYGON
limits 0.0685753–65.9378 BTC
Exchange
2
MarketExchange
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 25 mo in business ⚠ 1 open complaint
4.4787 BTC
no sending fee
340 940.92
−0.33947997 vs best
30 000 000 USDTPOLYGON
limits 0.02769232–26.3736 BTC
Exchange
3
Lizex
✓ clean on our feeds □ no documents ⚡ automatic ◷ 19 mo in business
4.4787 BTC
no sending fee
340 523.79
−417.4614 vs best
1 000 000 USDTPOLYGON
limits 0.00105475–13.1844 BTC
Exchange
4
Global-Ex
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 80 mo in business
4.4787 BTC
no sending fee
340 280.04
−661.2107 vs best
508 279 USDTPOLYGON
limits 0.08–50.0000 BTC
Exchange
5
CryptoBarMen
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 93 mo in business
4.4787 BTC
no sending fee
340 218.09
−723.1705 vs best
12 465 114 USDTPOLYGON
limits 1.7000–164.0934 BTC
Exchange
6
MoonLight
? not checked □ no documents ⏳ manual ∿ floating ◷ 26 mo in business
4.4787 BTC
no sending fee
340 218.09
−723.1705 vs best
1 000 000 USDTPOLYGON
limits 0.054–13.1642 BTC
Exchange
7
Bitsz
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 28 mo in business
4.4787 BTC
no sending fee
340 138.69
−802.5701 vs best
70 000 000 USDTPOLYGON
limits 0.03956004–158.2402 BTC
Exchange
8
KeysTop
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 21 mo in business
4.4787 BTC
no sending fee
340 138.68
−802.5711 vs best
980 200 USDTPOLYGON
limits 0.046–12.5353 BTC
Exchange
9
LetsGo
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 23 mo in business
4.4787 BTC
no sending fee
340 136.51
−804.7410 vs best
10 000 000 USDTPOLYGON
limits 0.1–20.0000 BTC
Exchange
10
Ybexio
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 39 mo in business
4.4787 BTC
no sending fee
340 123.42
−817.8359 vs best
50 000 000 USDTPOLYGON
limits 0.03296705–32.9670 BTC
Exchange
11
Kupitman
? not checked □ no documents ⏳ manual ∿ floating ◷ 44 mo in business
4.4787 BTC
no sending fee
340 123.42
−817.8372 vs best
10 000 000 USDTPOLYGON
limits 0.05–7.0000 BTC
Exchange
12
CryptoMonitor
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 21 mo in business
4.4787 BTC
no sending fee
340 104.28
−836.9749 vs best
45 000 000 USDTPOLYGON
limits 0.04615338–118.6801 BTC
Exchange
13
Грааль
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 26 mo in business
4.4787 BTC
no sending fee
340 104.28
−836.9760 vs best
1 000 000 USDTPOLYGON
limits 0.0505–12.8394 BTC
Exchange
14
CosmoChanger
✓ clean on our feeds ▤ documents ⏳ manual ∿ floating ◷ 68 mo in business
4.4787 BTC
no sending fee
339 750.35
−1 190.90 vs best
1 395 191 USDTPOLYGON
limits 0.15000001–50.0000 BTC
Exchange
15
GetMoney
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 13 mo in business
4.4787 BTC
no sending fee
339 697.08
−1 244.17 vs best
1 000 000 USDTPOLYGON
limits 0.05–13.1844 BTC
Exchange
16
CoinPayMaster
✓ clean on our feeds ▤ documents ⏳ manual ◷ 97 mo in business
4.4787 BTC
no sending fee
339 673.64
−1 267.61 vs best
20 160 252 USDTPOLYGON
limits 0.44999999–50.0000 BTC
Exchange
17
MisterBit
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 30 mo in business
4.4787 BTC
no sending fee
339 638.86
−1 302.40 vs best
14 346 875 USDTPOLYGON
limits 0.15–189.1874 BTC
Exchange
18
BroGuru
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 57 mo in business
4.4787 BTC
no sending fee
339 456.36
−1 484.89 vs best
7 000 000 USDTPOLYGON
limits 0.06328251–11.8655 BTC
Exchange
19
ProtonPlus
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 48 mo in business
4.4787 BTC
no sending fee
339 435.98
−1 505.28 vs best
7 600 000 USDTPOLYGON
limits 0.052735–15.8206 BTC
Exchange
20
Sharky
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 54 mo in business
4.4787 BTC
no sending fee
339 414.09
−1 527.16 vs best
5 500 000 USDTPOLYGON
limits 0.052745–6.5931 BTC
Exchange
21
OpenChange
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 133 mo in business
4.4787 BTC
no sending fee
339 413.62
−1 527.64 vs best
18 600 000 USDTPOLYGON
limits 0.06593418–26.3737 BTC
Exchange
22
BucksBunny
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 47 mo in business
4.4787 BTC
no sending fee
339 403.90
−1 537.35 vs best
10 850 000 USDTPOLYGON
limits 0.065931–13.1862 BTC
Exchange
23
JohnnyDo
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 61 mo in business
4.4787 BTC
no sending fee
339 374.54
−1 566.71 vs best
6 500 000 USDTPOLYGON
limits 0.065936–9.8905 BTC
Exchange
24
Bitality
✓ clean on our feeds ▤ documents ⏳ manual ∿ floating ◷ 74 mo in business
4.4787 BTC
no sending fee
339 129.57
−1 811.69 vs best
1 961 187 USDTPOLYGON
limits 0.2–100.0000 BTC
Exchange
25
XChangic
✓ clean on our feeds □ no documents ⚡ automatic ◷ 90 mo in business
4.4787 BTC
no sending fee
339 126.88
−1 814.38 vs best
938 927 USDTPOLYGON
limits 0.00132066–12.4000 BTC
Exchange
26
Delets
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 95 mo in business
4.4787 BTC
no sending fee
339 119.92
−1 821.34 vs best
1 135 775 USDTPOLYGON
limits 0.04–15.0000 BTC
Exchange
27
EasyBit
✓ clean on our feeds ▤ documents ⚡ automatic ∿ floating ◷ 82 mo in business
4.4787 BTC
no sending fee
339 012.99
−1 928.26 vs best
9 989 398 USDTPOLYGON
limits 0.0004–131.9700 BTC
Exchange
28
AlpinaEx
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 18 mo in business
4.4787 BTC
no sending fee
338 959.47
−1 981.78 vs best
503 424 USDTPOLYGON
limits 0.03963243–6.6054 BTC
Exchange
29
RamonCash
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 100 mo in business
4.4787 BTC
no sending fee
338 950.11
−1 991.15 vs best
5 500 000 USDTPOLYGON
limits 0.05–72.6740 BTC
Exchange
30
CryptoGin
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 53 mo in business
4.4787 BTC
no sending fee
338 944.41
−1 996.85 vs best
15 000 000 USDTPOLYGON
limits 0.08916447–50.0000 BTC
Exchange
31
PoxBuy
✓ clean on our feeds □ no documents ⏳ manual ◷ 11 mo in business
4.4787 BTC
no sending fee
338 923.10
−2 018.15 vs best
5 652 383 USDTPOLYGON
limits 0.03140911–7.8523 BTC
Exchange
32
BitKit
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 40 mo in business
4.4787 BTC
no sending fee
338 738.24
−2 203.02 vs best
810 000 USDTPOLYGON
limits 0.01322172–10.7096 BTC
Exchange
33
Kursov24
✓ clean on our feeds ▤ documents ⏳ manual ∿ floating ◷ 79 mo in business
4.4787 BTC
no sending fee
338 722.36
−2 218.89 vs best
50 000 074 USDTPOLYGON
limits 0.05915484–7.5115 BTC
Exchange
34
Changee
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 46 mo in business
4.4787 BTC
no sending fee
338 596.95
−2 344.31 vs best
553 552 USDTPOLYGON
limits 0.16484448–13.1865 BTC
Exchange
35
Clean-Exchange
✓ clean on our feeds □ no documents ⚡ automatic ◷ 77 mo in business
4.4787 BTC
no sending fee
338 428.58
−2 512.67 vs best
32 613 923 USDTPOLYGON
limits 0.03970146–431.6068 BTC
Exchange
36
CoinCraddle
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 79 mo in business
4.4787 BTC
no sending fee
338 427.14
−2 514.12 vs best
758 291 USDTPOLYGON
limits 0.13187558–13.1865 BTC
Exchange
37
X-Pay
✓ clean on our feeds □ no documents ⏳ manual ◷ 134 mo in business
4.4787 BTC
no sending fee
338 423.57
−2 517.69 vs best
2 011 811 USDTPOLYGON
limits 0.025–6.6170 BTC
Exchange
38
EasyBusy
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 29 mo in business
4.4787 BTC
no sending fee
338 012.59
−2 928.67 vs best
1 484 613 USDTPOLYGON
limits 0.052735–11.8655 BTC
Exchange
39
CinusExc
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 23 mo in business
4.4787 BTC
no sending fee
337 957.51
−2 983.74 vs best
999 278 USDTPOLYGON
limits 0.03962578–13.2086 BTC
Exchange
40
Даркен
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 59 mo in business
4.4787 BTC
no sending fee
337 954.65
−2 986.60 vs best
1 961 897 USDTPOLYGON
limits 0.03–25.9998 BTC
Exchange
41
ObminClub
✓ clean on our feeds □ no documents ⚡ automatic ◷ 11 mo in business ⚠ 2 open complaints
4.4787 BTC
no sending fee
337 925.83
−3 015.42 vs best
10 020 992 USDTPOLYGON
limits 0.0006–5.0000 BTC
Exchange
42
99Rates
✓ clean on our feeds □ no documents ⏳ manual ◷ 19 mo in business
4.4787 BTC
no sending fee
337 751.47
−3 189.79 vs best
4 875 731 USDTPOLYGON
limits 0.02386863–64.6539 BTC
Exchange
43
ChangeHero
✓ clean on our feeds ▤ documents ⚡ automatic ∿ floating ◷ 110 mo in business ⚠ 2 open complaints
4.4787 BTC
no sending fee
337 748.97
−3 192.29 vs best
3 848 135 USDTPOLYGON
limits 0.0103934–155.9010 BTC
Exchange
44
ImExchanger
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 130 mo in business
4.4787 BTC
no sending fee
337 596.57
−3 344.68 vs best
25 000 000 USDTPOLYGON
limits 0.0659–15.8242 BTC
Exchange
45
YellowChanger
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 44 mo in business
4.4787 BTC
no sending fee
337 596.22
−3 345.04 vs best
1 000 000 USDTPOLYGON
limits 0.01–13.0000 BTC
Exchange
46
1Mile
✓ clean on our feeds ▤ documents ⚡ automatic ∿ floating ◷ 109 mo in business
4.4787 BTC
no sending fee
337 590.92
−3 350.34 vs best
8 926 672 USDTPOLYGON
limits 0.0049–13.2667 BTC
Exchange
47
Rim-Exchange
✓ clean on our feeds □ no documents ⏳ manual ◷ 12 mo in business
4.4787 BTC
no sending fee
337 557.49
−3 383.77 vs best
50 000 000 USDTPOLYGON
limits 0.00398039–663.3986 BTC
Exchange
48
Bitok777
✓ clean on our feeds □ no documents ⏳ manual ◷ 109 mo in business
4.4787 BTC
no sending fee
337 403.98
−3 537.28 vs best
17 836 527 USDTPOLYGON
limits 0.01592881–26.5480 BTC
Exchange
49
ExchangeExpress
✓ clean on our feeds □ no documents ⏳ manual ◷ 108 mo in business
4.4787 BTC
no sending fee
337 234.17
−3 707.09 vs best
20 315 157 USDTPOLYGON
limits 0.04117014–30.7469 BTC
Exchange
50
StoreBucks
✓ clean on our feeds □ no documents ⏳ manual ◷ 36 mo in business
4.4787 BTC
no sending fee
337 217.72
−3 723.54 vs best
50 000 000 USDTPOLYGON
limits 0.0039844–664.0670 BTC
Exchange
51
ECashExpert
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 54 mo in business ⚠ 1 open complaint
4.4787 BTC
no sending fee
336 368.29
−4 572.97 vs best
1 218 919 USDTPOLYGON
limits 0.003994–200.0000 BTC
Exchange
52
GoExme
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 46 mo in business
4.4787 BTC
no sending fee
336 200.03
−4 741.22 vs best
758 400 USDTPOLYGON
limits 0.32964157–13.1865 BTC
Exchange
53
Crypto007
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 29 mo in business
4.4787 BTC
no sending fee
336 069.20
−4 872.05 vs best
3 983 433 USDTPOLYGON
limits 0.0036–13.3267 BTC
Exchange
54
Boss-Exchange
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 18 mo in business
4.4787 BTC
no sending fee
335 921.33
−5 019.92 vs best
2 487 404 USDTPOLYGON
limits 0.0023–13.3326 BTC
Exchange
55
Moneta365
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 46 mo in business
4.4787 BTC
no sending fee
335 589.39
−5 351.86 vs best
5 632 282 USDTPOLYGON
limits 0.0028–13.3458 BTC
Exchange
56
AppBit
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 66 mo in business
4.4787 BTC
no sending fee
334 974.58
−5 966.67 vs best
998 491 USDTPOLYGON
limits 0.00745549–13.3501 BTC
Exchange
57
Best-Obmen
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 112 mo in business
4.4787 BTC
no sending fee
334 927.24
−6 014.02 vs best
4 999 043 USDTPOLYGON
limits 0.01337217–6.5122 BTC
Exchange
58
Dvizh
✓ clean on our feeds □ no documents ⚡ automatic ◷ 52 mo in business
4.4787 BTC
no sending fee
334 661.85
−6 279.40 vs best
5 688 292 USDTPOLYGON
limits 0.001–6.6914 BTC
Exchange
59
CashRocket
✓ clean on our feeds □ no documents ⏳ manual ◷ 41 mo in business
4.4787 BTC
no sending fee
334 531.67
−6 409.58 vs best
487 000 USDTPOLYGON
limits 0.01338798–6.5199 BTC
Exchange
60
KZ007
✓ clean on our feeds □ no documents ⏳ manual ◷ 101 mo in business
4.4787 BTC
no sending fee
334 525.09
−6 416.17 vs best
516 658 USDTPOLYGON
limits 0.01204942–6.3897 BTC
Exchange
61
NextBit
✓ clean on our feeds □ no documents ⚡ automatic ◷ 78 mo in business
4.4787 BTC
no sending fee
334 525.09
−6 416.17 vs best
37 000 000 USDTPOLYGON
limits 0.00669412–13.3882 BTC
Exchange
62
AbcObmen
✓ clean on our feeds □ no documents ⏳ manual ◷ 77 mo in business
4.4787 BTC
no sending fee
334 231.83
−6 709.43 vs best
10 492 000 USDTPOLYGON
limits 0.00155–6 590 000.00 BTC
Exchange
63
YChanger
✓ clean on our feeds □ no documents ⏳ manual ◷ 113 mo in business
4.4787 BTC
no sending fee
333 903.10
−7 038.16 vs best
20 017 791 USDTPOLYGON
limits 0.00153–1 530.00 BTC
Exchange
64
MultiVal
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 160 mo in business
4.4787 BTC
no sending fee
333 838.05
−7 103.20 vs best
996 393 USDTPOLYGON
limits 0.0134158–13.3674 BTC
Exchange
65
BTC2Pay
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 106 mo in business
4.4787 BTC
no sending fee
333 506.23
−7 435.03 vs best
5 999 190 USDTPOLYGON
limits 0.00537166–80.5640 BTC
Exchange
66
AxoCash
✓ clean on our feeds □ no documents ⏳ manual ◷ 17 mo in business
4.4787 BTC
no sending fee
333 323.71
−7 617.54 vs best
1 260 460 USDTPOLYGON
limits 0.004–10.0000 BTC
Exchange
67
BaksMan
✓ clean on our feeds □ no documents ⏳ manual ∿ floating ◷ 122 mo in business
4.4787 BTC
no sending fee
333 306.66
−7 634.59 vs best
1 376 528 USDTPOLYGON
limits 0.00235115–4.7000 BTC
Exchange
68
Izi
✓ clean on our feeds □ no documents ⏳ manual ◷ 27 mo in business
4.4787 BTC
no sending fee
333 160.24
−7 781.02 vs best
2 297 359 USDTPOLYGON
limits 0.004–10.0000 BTC
Exchange
69
818Finance
✓ clean on our feeds □ no documents ⏳ manual ◷ 54 mo in business ⚠ 1 open complaint
4.4787 BTC
no sending fee
332 969.92
−7 971.33 vs best
2 275 446 USDTPOLYGON
limits 0.004–10.0000 BTC
Exchange
70
ObmenoFF
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 119 mo in business
4.4787 BTC
no sending fee
332 819.22
−8 122.04 vs best
1 473 021 USDTPOLYGON
limits 0.00605559–13.4419 BTC
Exchange
71
FastEx
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 25 mo in business
4.4787 BTC
no sending fee
332 660.58
−8 280.68 vs best
1 436 196 USDTPOLYGON
limits 0.00605848–13.4483 BTC
Exchange
72
Ex-Money
✓ clean on our feeds □ no documents ⏳ manual ◷ 92 mo in business
4.4787 BTC
no sending fee
331 165.49
−9 775.77 vs best
20 018 297 USDTPOLYGON
limits 0.00033–1 540.00 BTC
Exchange
73
Express-PM
✓ clean on our feeds □ no documents ⚡ automatic ◷ 14 mo in business
4.4787 BTC
no sending fee
330 441.94
−10 499.32 vs best
12 309 143 USDTPOLYGON
limits 0.02710735–166.8341 BTC
Exchange
74
Вобменка
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 100 mo in business
4.4787 BTC
no sending fee
330 110.03
−10 831.22 vs best
12 309 143 USDTPOLYGON
limits 0.02713461–167.0019 BTC
Exchange
75
RoyalCash
✓ clean on our feeds □ no documents ⏳ manual ◷ 82 mo in business
4.4787 BTC
no sending fee
329 438.30
−11 502.95 vs best
51 000 675 USDTPOLYGON
limits 0.00087–1 320.00 BTC
Exchange
76
Hinadex
✓ clean on our feeds □ no documents ⚡ automatic ∿ floating ◷ 33 mo in business
4.4787 BTC
no sending fee
329 127.48
−11 813.78 vs best
707 327 USDTPOLYGON
limits 0.003971–10.0000 BTC
Exchange
77
1WM
✓ clean on our feeds □ no documents ⚡ automatic ◷ 141 mo in business
4.4787 BTC
no sending fee
329 091.18
−11 850.08 vs best
12 315 732 USDTPOLYGON
limits 0.02721861–167.6086 BTC
Exchange
78
OneMoment
✓ clean on our feeds □ no documents ⏳ manual ◷ 78 mo in business
4.4787 BTC
no sending fee
327 146.23
−13 795.02 vs best
1 230 000 USDTPOLYGON
limits 0.000137–15.0000 BTC
Exchange
79
BlaBlaMoney
✓ clean on our feeds □ no documents ⏳ manual ◷ 59 mo in business
4.4787 BTC
no sending fee
326 422.58
−14 518.67 vs best
50 045 741 USDTPOLYGON
limits 0.00137206–154.0000 BTC
Exchange
80
Xchange
✓ clean on our feeds □ no documents ⏳ manual ◷ 166 mo in business
4.4787 BTC
no sending fee
322 645.76
−18 295.49 vs best
75 060 510 USDTPOLYGON
limits 0.00132–154.0000 BTC
Exchange
81
CoinStart
✓ clean on our feeds □ no documents ⏳ manual ◷ 93 mo in business
4.4787 BTC
no sending fee
320 691.63
−20 249.62 vs best
620 643 USDTPOLYGON
limits 0.000209–15.0000 BTC
Exchange
82
24PayBank
✓ clean on our feeds □ no documents ⏳ manual ◷ 128 mo in business
4.4787 BTC
no sending fee
315 853.22
−25 088.04 vs best
10 008 291 USDTPOLYGON
limits 0.00141797–154.0000 BTC
Exchange
83
Котлета
✓ clean on our feeds □ no documents ⚡ automatic ◷ 39 mo in business
4.4787 BTC
no sending fee
312 538.46
−28 402.80 vs best
1 000 000 USDTPOLYGON
limits 0.000215–15.0000 BTC
Exchange
And what we measured ourselves 3 of 3 answered
Exolix best of the three
1.0000 BTC
75 141.89  09:09 UTC
Exchange
ChangeNOW
1.0000 BTC
74 927.33  09:09 UTC
Exchange
Godex
1.0000 BTC
73 639.47  09:09 UTC
Exchange

These three we ask ourselves, every five minutes, and keep every answer with the time it was given. The list above is what the exchangers publish about themselves.

What you receive is computed from the exchanger’s own rate and its own declared fees, for the amount you entered — not from a market average. “Clean on our feeds” means the site appears in none of our threat sources; it is the result of a check, not a recommendation. We are not paid by the exchangers listed here.

What this page answers