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Old São Tomé Dobra (STD) to Bhutanese Ngultrum (BTN)

Convert old São Tomé dobras to Bhutanese Ngultrum at the live mid-market rate. Reverse: BTN 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 BTN.

1 Old São Tomé Dobra =

0.004399 BTN +0.42% today

1 STD = 0.00439854 BTN · 1 BTN = 227.348 STD

Mid-market rate, updated 03:38 UTC. Paid plans update as often as every 60 seconds. Get STD→BTN rates via API

STD to BTN over the last year

0.00420.0044Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
0.0045601
52-week low
0.0041182
52-week average
0.0043641
Change over the year
+3.84%

Conversion tables

STD to BTN
STD BTN
1 STD 0.004399 BTN
10 STD 0.04399 BTN
100 STD 0.4399 BTN
1,000 STD 4.40 BTN
10,000 STD 43.99 BTN
50,000 STD 219.93 BTN
100,000 STD 439.85 BTN
BTN to STD
BTN STD
1 BTN 227.35 STD
10 BTN 2,273.48 STD
100 BTN 22,734.83 STD
1,000 BTN 227,348.32 STD
10,000 BTN 2,273,483.21 STD
50,000 BTN 11,367,416.05 STD
100,000 BTN 22,734,832.09 STD

Get STD→BTN rates via API

The live rate, the rate on any past day or a whole range, for BTN 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=BTN \
  -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=BTN \
  -d date=2025-10-04 \
  -H "apikey: YOUR-API-KEY"

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Questions about STD to BTN

How much is 1 STD in BTN?

1 Old São Tomé Dobra is 0.00439854 Bhutanese Ngultrum at the mid-market rate of 4 October 2026, 03:38 UTC, and 1 BTN is 227.348 STD.

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

Over the last 52 weeks 1 STD ranged from 0.00411821 to 0.00456015 BTN, 0.0043641 BTN on average.

Which exchange rate is this?

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