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Old São Tomé Dobra (STD) to Old Belarusian Ruble (BYR)

Convert old São Tomé dobras to old Belarusian rubles at the live mid-market rate. Reverse: BYR to STD

The Old São Tomé Dobra is no longer in use

Old São Tomé Dobra (STD) was replaced by the São Tomé and Príncipe Dobra (STN) in 2018. For today’s money, convert STN 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 STD to BYN.

1 Old São Tomé Dobra =

0.8986 BYR +0.67% today

1 STD = 0.898638 BYR · 1 BYR = 1.1128 STD

Mid-market rate, updated 12:03 UTC. Paid plans update as often as every 60 seconds. Get STD→BYR rates via API

STD to BYR over the last year

1.001.251.50Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
1.62243
52-week low
0.88980
52-week average
1.24120
Change over the year
−44.35%

Conversion tables

STD to BYR
STD BYR
1 STD 0.8986 BYR
10 STD 9 BYR
100 STD 90 BYR
1,000 STD 899 BYR
10,000 STD 8,986 BYR
50,000 STD 44,932 BYR
100,000 STD 89,864 BYR
BYR to STD
BYR STD
1 BYR 1.11 STD
10 BYR 11.13 STD
100 BYR 111.28 STD
1,000 BYR 1,112.80 STD
10,000 BYR 11,127.95 STD
50,000 BYR 55,639.77 STD
100,000 BYR 111,279.55 STD

Get STD→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=STD -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=STD -d currencies=BYR \
  -d date=2025-10-04 \
  -H "apikey: YOUR-API-KEY"

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Questions about STD to BYR

How much is 1 STD in BYR?

1 Old São Tomé Dobra is 0.898638 old Belarusian rubles at the mid-market rate of 4 October 2026, 12:03 UTC, and 1 BYR is 1.1128 STD.

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

Over the last 52 weeks 1 STD ranged from 0.889797 to 1.62243 BYR, 1.2412 BYR on average.

Which exchange rate is this?

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