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  2. BYR to OP

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.

1 Old Belarusian Ruble =

0.0003825 OP +2.39% today

1 BYR = 0.00038248 OP · 1 OP = 2,614.49 BYR

Mid-market rate, updated 10:35 UTC. Paid plans update as often as every 60 seconds. Get BYR→OP rates via API

BYR to OP over the last year

00.00020.00040.0006Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
0.00062094
52-week low
0.00003887
52-week average
0.00029422
Change over the year
+837.11%

Conversion tables

BYR to OP
BYR OP
1 BYR 0.0003825 OP
10 BYR 0.003825 OP
100 BYR 0.03825 OP
1,000 BYR 0.3825 OP
10,000 BYR 3.82484300 OP
50,000 BYR 19.12421500 OP
100,000 BYR 38.24843000 OP
OP to BYR
OP BYR
1 OP 2,614 BYR
10 OP 26,145 BYR
100 OP 261,449 BYR
1,000 OP 2,614,486 BYR
10,000 OP 26,144,862 BYR
50,000 OP 130,724,312 BYR
100,000 OP 261,448,624 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 0.00038248 Optimism at the mid-market rate of 4 October 2026, 10:35 UTC, and 1 OP is 2,614.49 BYR.

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, 0.00029422 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.