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Old São Tomé Dobra (STD) to Cardano (ADA)

Convert old São Tomé dobras to Cardanos at the live mid-market rate. Reverse: ADA 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 ADA.

1 Old São Tomé Dobra =

0.0001857 ADA −0.39% today

1 STD = 0.00018567 ADA · 1 ADA = 5,385.86 STD

Mid-market rate, updated 23:03 UTC. Paid plans update as often as every 60 seconds. Get STD→ADA rates via API

STD to ADA over the last year

0.00010.00020.0003Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
0.00031954
52-week low
0.00005440
52-week average
0.00017929
Change over the year
+231.51%

Conversion tables

STD to ADA
STD ADA
1 STD 0.0001857 ADA
10 STD 0.001857 ADA
100 STD 0.01857 ADA
1,000 STD 0.1857 ADA
10,000 STD 1.856715 ADA
50,000 STD 9.283575 ADA
100,000 STD 18.567150 ADA
ADA to STD
ADA STD
1 ADA 5,385.86 STD
10 ADA 53,858.56 STD
100 ADA 538,585.56 STD
1,000 ADA 5,385,855.59 STD
10,000 ADA 53,858,555.87 STD
50,000 ADA 269,292,779.33 STD
100,000 ADA 538,585,558.67 STD

Get STD→ADA rates via API

The live rate, the rate on any past day or a whole range, for ADA 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=ADA \
  -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=ADA \
  -d date=2025-10-01 \
  -H "apikey: YOUR-API-KEY"

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Questions about STD to ADA

How much is 1 STD in ADA?

1 Old São Tomé Dobra is 0.00018567 Cardanos at the mid-market rate of 1 October 2026, 23:03 UTC, and 1 ADA is 5,385.86 STD.

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

Over the last 52 weeks 1 STD ranged from 0.0000544 to 0.00031954 ADA, 0.00017929 ADA on average.

Which exchange rate is this?

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