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Getting started

“Notes calculator” is a notepad for working through problems that involve calculations. Type a calculation in the input field (left side), and the result will be displayed on the right side.

The currency conversion below uses an illustrative rate of USD 1 = EUR 0.8. Live currency results vary with the app’s current rate.

Notes Calculator
Calculation example
CalculationResult
(75 + 25) x 3300
100 + 50%150
20% of 408
100 dollars in euro€80
60 degree in radians1,05 rad
1 kg in g1.000 g
1 day in seconds86.400 seconds
// You can also use variables: <-- this is a comment, which is ignored
discount = 10%10%
cost = 550€€550
cost - discount€495

Calculations are performed automatically as you type, and the result is updated in real-time.

What’s new

Section titled “What’s new”
  • Words and Numbers: lines like 100 groceries or 3 kg apples now show a result.
  • Durations: 2 weeks + 1 day shows 2 weeks 1 day, and date differences show years, months, weeks and days.
  • Mixed units: feet and inches, pounds and ounces, and mixed currencies follow simple rules.
  • Decimal Point & Thousands Separators: separators are now strict. With the comma as the decimal point, a dot is always a thousands separator, so 1.5 is 15 (write 1,5). The same applies the other way round.
  • Unit Reference: new units for electricity, frequency, data rates, torque, typography and more, and 5 V * 2 amps shows 10 W.
  • Volume Units Setting: choose US Customary, Imperial or Metric gallons, pints and cups.
  • Line Ranges: add up a block of lines with line2...line6 (or 2...6), or use it in avg(...), max(...) and friends.
  • Sharing a Note as a Link: share a note as a link that opens in the web app, custom result text included.
  • Notes and Tabs: on phones, long-press a tab for its menu. Note lists show when each note was created and last updated, most recently updated first.
  • Percentages: as % turns any result into a percentage, and 20% of 50 USD shows $10.
  • Conditionals: comparisons work across units, so 1 km > 900 m is true.
  • Functions: sin(30°) uses degrees.
  • Settings: changing a setting updates your open notes right away.
  • Headings: pasting text with Markdown headings like # Title makes headings.
  • Answer Menu: copy a result, choose its decimal places, or replace it with your own text.
  • Decimal Point & Thousands Separators: type grouped numbers like 1.234.567 (matching your “Use dot as decimal point” setting) or 1_000_000 with underscores.
  • Line References: refer to an earlier line by its number, e.g. line1.
  • User-Defined Functions: define your own functions like f(x) = 2*x + 1.
  • Number Bases & Scientific Notation: hex, binary, octal, and scientific literals plus in hex / as scientific postfixes.