Convert 10,000 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.

Amount

From

10,000 Optimism =

25,827,555 BYR −3.52% today

1 OP = 2,582.76 BYR · 1 BYR = 0.00038718 OP

Mid-market rate, updated 12:00 UTC. Paid plans update as often as every 60 seconds. Get OP→BYR rates via API

OP to BYR over the last year

52-week high: 25,723.75
52-week low: 1,610.47
52-week average: 5,767.18
Change over the year: −89.46%

Conversion tables

OP to BYR
OP	BYR
1 OP	2,583 BYR
10 OP	25,828 BYR
100 OP	258,276 BYR
1,000 OP	2,582,756 BYR
10,000 OP	25,827,555 BYR
50,000 OP	129,137,776 BYR
100,000 OP	258,275,552 BYR

BYR to OP
BYR	OP
1 BYR	0.0003872 OP
10 BYR	0.003872 OP
100 BYR	0.03872 OP
1,000 BYR	0.3872 OP
10,000 BYR	3.87183400 OP
50,000 BYR	19.35917000 OP
100,000 BYR	38.71834000 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 10,000 OP in BYR?

10,000 Optimism is 25,827,555 old Belarusian rubles at the mid-market rate of 4 October 2026, 12:00 UTC, when 1 OP = 2,582.76 BYR.

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, 5,767.18 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.