Convert 1 Old Belarusian Ruble (BYR) to Optimism (OP)

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

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 BYN to OP.

Amount

From

1 Old Belarusian Ruble =

0.0003862 OP +3.40% today

1 BYR = 0.00038623 OP · 1 OP = 2,589.13 BYR

Mid-market rate, updated 13:16 UTC. Paid plans update as often as every 60 seconds. Get BYR→OP rates via API

BYR to OP over the last year

52-week high: 0.00062094
52-week low: 0.00003887
52-week average: 0.00029423
Change over the year: +846.29%

Conversion tables

BYR to OP
BYR	OP
1 BYR	0.0003862 OP
10 BYR	0.003862 OP
100 BYR	0.03862 OP
1,000 BYR	0.3862 OP
10,000 BYR	3.86230200 OP
50,000 BYR	19.31151000 OP
100,000 BYR	38.62302000 OP

OP to BYR
OP	BYR
1 OP	2,589 BYR
10 OP	25,891 BYR
100 OP	258,913 BYR
1,000 OP	2,589,130 BYR
10,000 OP	25,891,298 BYR
50,000 OP	129,456,489 BYR
100,000 OP	258,912,977 BYR

Get BYR→OP rates via API

The live rate, the rate on any past day or a whole range, for OP 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=BYR -d currencies=OP \
  -H "apikey: YOUR-API-KEY"

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

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Questions about BYR to OP

How much is 1 BYR in OP?

1 Old Belarusian Ruble is 0.0003862 Optimism at the mid-market rate of 4 October 2026, 13:16 UTC, when 1 BYR = 0.00038623 OP.

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

Over the last 52 weeks 1 BYR ranged from 0.00003887 to 0.00062094 OP, 0.00029423 OP on average.

Which exchange rate is this?

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