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Old Zambian Kwacha (ZMK) to Optimism (OP)

Convert old Zambian kwachas to Optimism at the live mid-market rate. Reverse: OP to ZMK

The Old Zambian Kwacha is no longer in use

Old Zambian Kwacha (ZMK) was replaced by the Zambian Kwacha (ZMW) in 2013. For today’s money, convert ZMW to OP.

1 Old Zambian Kwacha =

0.0008267 OP +1.63% today

1 ZMK = 0.00082667 OP · 1 OP = 1,209.67 ZMK

Mid-market rate, updated 03:50 UTC. Paid plans update as often as every 60 seconds. Get ZMK→OP rates via API

ZMK to OP over the last year

0.00050.001Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
0.00135208
52-week low
0.00014663
52-week average
0.00076488
Change over the year
+438.76%

Conversion tables

ZMK to OP
ZMK OP
1 ZMK 0.0008267 OP
10 ZMK 0.008267 OP
100 ZMK 0.08267 OP
1,000 ZMK 0.8267 OP
10,000 ZMK 8.26670500 OP
50,000 ZMK 41.33352500 OP
100,000 ZMK 82.66705000 OP
OP to ZMK
OP ZMK
1 OP 1,210 ZMK
10 OP 12,097 ZMK
100 OP 120,967 ZMK
1,000 OP 1,209,672 ZMK
10,000 OP 12,096,718 ZMK
50,000 OP 60,483,591 ZMK
100,000 OP 120,967,182 ZMK

Get ZMK→OP rates via API

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

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

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Questions about ZMK to OP

How much is 1 ZMK in OP?

1 Old Zambian Kwacha is 0.00082667 Optimism at the mid-market rate of 4 October 2026, 03:50 UTC, and 1 OP is 1,209.67 ZMK.

What was the ZMK to OP rate over the last year?

Over the last 52 weeks 1 ZMK ranged from 0.00014663 to 0.00135208 OP, 0.00076488 OP on average.

Which exchange rate is this?

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