Type it. See the answer
A notepad calculator for percentages, units, currencies and dates. The answer appears next to every line.
See how it works
This is the real Sumico engine, running in your browser. Click a line and type.
What it understands
Full how-to-
Percentages
20% off $79of, on, off, as a % of -
Units
100 km/h in mphLength, weight, volume, data, speed, temperature -
Currencies
$100 in EUR160 currencies and crypto, rates work offline -
Time zones
3 pm in TokyoConverted from your local time -
Dates
today + 3 weeksDays between dates, next friday, 3 days ago -
Variables
price = $19price * 3Change one line, everything below updates
Windows
macOS