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Iranian Rial (IRR) to Old São Tomé Dobra (STD)

Convert Iranian rials to old São Tomé dobras at the live mid-market rate. Reverse: STD to IRR

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 IRR to STN.

1 Iranian Rial =

0.01252 STD −0.67% today

1 IRR = 0.0125201 STD · 1 STD = 79.8715 IRR

Mid-market rate, updated 08:31 UTC. Paid plans update as often as every 60 seconds. Get IRR→STD rates via API

IRR to STD over the last year

00.200.40Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
0.512117
52-week low
0.012485
52-week average
0.141735
Change over the year
−97.49%

Conversion tables

IRR to STD
IRR STD
1 IRR 0.01252 STD
10 IRR 0.1252 STD
100 IRR 1.25 STD
1,000 IRR 12.52 STD
10,000 IRR 125.20 STD
50,000 IRR 626.01 STD
100,000 IRR 1,252.01 STD
STD to IRR
STD IRR
1 STD 80 IRR
10 STD 799 IRR
100 STD 7,987 IRR
1,000 STD 79,871 IRR
10,000 STD 798,715 IRR
50,000 STD 3,993,574 IRR
100,000 STD 7,987,148 IRR

Get IRR→STD rates via API

The live rate, the rate on any past day or a whole range, for STD 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=IRR -d currencies=STD \
  -H "apikey: YOUR-API-KEY"

# the rate on a past day
curl https://api.currencyapi.com/v3/historical \
  -G -d base_currency=IRR -d currencies=STD \
  -d date=2025-10-04 \
  -H "apikey: YOUR-API-KEY"

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Questions about IRR to STD

How much is 1 IRR in STD?

1 Iranian Rial is 0.0125201 old São Tomé dobras at the mid-market rate of 4 October 2026, 08:31 UTC, and 1 STD is 79.8715 IRR.

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

Over the last 52 weeks 1 IRR ranged from 0.0124851 to 0.512117 STD, 0.141735 STD on average.

Which exchange rate is this?

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