A calculator
that reads like notes.
Type percentages, units, currencies, dates and variables in plain text. Sumico shows the answer next to every line, instantly and offline.
# Launch plan
users = 1200012,000
conversion = 4.5%4.5%
price = $19$19
customers = users * conversion540
mrr = customers * price$10,260
mrr in EUR€9,439.2
Runway: $250k / mrr24.37
Dec 25 - Oct 878 days
Unsigned preview builds: Windows SmartScreen may ask you to confirm the first launch.
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20% of 45090
Percentages that read like sentences: of, on, off, as a % of.
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10 km in miles6.21 miles
Length, mass, volume, data, time and temperature, with SI prefixes.
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$100 in EUR€92
160 currencies with cached rates. Works offline and tells you when rates are stale.
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2:30pm HKT in Berlin8:30 am
Dates, durations and time zones, always in your local time.
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price * 3$57
Variables update every line below the moment you change them.
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prev - 5%$72.2
Line references: prev, sum and average over the lines above.
Local first. No account. No AI. Everything you type stays on your device; the only network request is for exchange rates.