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Optimism (OP) to Old Belarusian Ruble (BYR)

Convert Optimism to old Belarusian rubles at the live mid-market rate. Reverse: BYR to OP

The Old Belarusian Ruble is no longer in use

Old Belarusian Ruble (BYR) was replaced by the Belarusian Ruble (BYN) in 2016. For today’s money, convert OP to BYN.

1 Optimism =

2,653 BYR −0.90% today

1 OP = 2,653.10 BYR · 1 BYR = 0.00037692 OP

Mid-market rate, updated 05:12 UTC. Paid plans update as often as every 60 seconds. Get OP→BYR rates via API

OP to BYR over the last year

010,000.0020,000.00Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
25,723.75
52-week low
1,610.47
52-week average
5,767.37
Change over the year
−89.17%

Conversion tables

OP to BYR
OP BYR
1 OP 2,653 BYR
10 OP 26,531 BYR
100 OP 265,310 BYR
1,000 OP 2,653,099 BYR
10,000 OP 26,530,994 BYR
50,000 OP 132,654,968 BYR
100,000 OP 265,309,937 BYR
BYR to OP
BYR OP
1 BYR 0.0003769 OP
10 BYR 0.003769 OP
100 BYR 0.03769 OP
1,000 BYR 0.3769 OP
10,000 BYR 3.76917700 OP
50,000 BYR 18.84588500 OP
100,000 BYR 37.69177000 OP

Get OP→BYR rates via API

The live rate, the rate on any past day or a whole range, for BYR and 170+ other currencies, as JSON. Free plan included. See the exchange rate API.

Get a free API key API documentation 
curl https://api.currencyapi.com/v3/latest \
  -G -d base_currency=OP -d currencies=BYR \
  -H "apikey: YOUR-API-KEY"

# the rate on a past day
curl https://api.currencyapi.com/v3/historical \
  -G -d base_currency=OP -d currencies=BYR \
  -d date=2025-10-04 \
  -H "apikey: YOUR-API-KEY"

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Questions about OP to BYR

How much is 1 OP in BYR?

1 Optimism is 2,653.10 old Belarusian rubles at the mid-market rate of 4 October 2026, 05:12 UTC, and 1 BYR is 0.00037692 OP.

What was the OP to BYR rate over the last year?

Over the last 52 weeks 1 OP ranged from 1,610.47 to 25,723.75 BYR, 5,767.37 BYR on average.

Which exchange rate is this?

The mid-market rate: the midpoint between what currency markets pay and ask for OP/BYR, without the margin a bank or card issuer adds, so the rate you are charged is usually a little worse.