Convert 100,000 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

100,000 Optimism =

264,689,596 BYR −1.13% today

1 OP = 2,646.90 BYR · 1 BYR = 0.0003778 OP

Mid-market rate, updated 04:36 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: 5,767.35
Change over the year: −89.20%

Conversion tables

OP to BYR
OP	BYR
1 OP	2,647 BYR
10 OP	26,469 BYR
100 OP	264,690 BYR
1,000 OP	2,646,896 BYR
10,000 OP	26,468,960 BYR
50,000 OP	132,344,798 BYR
100,000 OP	264,689,596 BYR

BYR to OP
BYR	OP
1 BYR	0.0003778 OP
10 BYR	0.003778 OP
100 BYR	0.03778 OP
1,000 BYR	0.3778 OP
10,000 BYR	3.77801000 OP
50,000 BYR	18.89005000 OP
100,000 BYR	37.78010000 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 100,000 OP in BYR?

100,000 Optimism is 264,689,596 old Belarusian rubles at the mid-market rate of 4 October 2026, 04:36 UTC, when 1 OP = 2,646.90 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, 5,767.35 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.