A calculator that thinks like you do
Gauss is a notepad-style calculator for macOS. Type math the way you think — with words, units, and currencies — and get instant results on every line. No buttons, no equals sign, no separate conversion apps.
Built for developers, designers, and anyone who does quick math throughout the day. Summon it with a hotkey, type your expression, and get back to work. Variables carry across lines, results auto-save, and everything runs locally on your Mac.
Natural Language Math
Type expressions the way you think. Write "20% of 150" or "$45 + tax" and get instant results — no buttons, no equals sign needed.
Live Currency Conversion
170+ currencies with real-time exchange rates. Type "100 USD in EUR" and see the result update as you type. Rates are cached for offline use.
Developer Tools
Colors, base64, hex, timestamps — built right in. Convert between HEX, RGB, and HSL. Encode and decode base64 strings. All without leaving the notepad.
Smart Autocomplete
Ghost text suggestions appear as you type, helping you discover functions and complete expressions faster. Accept with Tab and keep going.
Dates & Functions
Date arithmetic, trigonometry, factorials, and more. Calculate days between dates, add weeks to a date, or use any of 20 built-in math functions.
Customizable
Precision, font size, appearance, hotkeys — make Gauss yours. Set decimal places from 0 to 10, choose your date format, and assign a global hotkey.
Everything you need, nothing you don't
From variables to currency exchange — Gauss packs serious power into a clean, focused interface.
Variables & References
NewUse sum, avg, and prev to reference earlier lines. Assign variables and reuse them throughout your notepad.
Percentage Operations
Intuitive percentage math: "20% of 150", "15% on 200", "30% off 80" — all work as you'd expect.
Unit Conversions
80+ units across length, weight, temperature, time, data, and more. Type naturally: "5 km in miles".
Currency Exchange
170+ currencies with live rates. Convert between USD, EUR, GBP, JPY, and more with a simple expression.
Math Functions
20 built-in functions: sin, cos, tan, log, sqrt, abs, ceil, floor, round, and more.
Number Systems
Convert between hex, binary, octal, and decimal. Prefix with 0x, 0b, or 0o for instant conversion.
Date Arithmetic
Calculate days between dates, add or subtract time. "today + 30 days" or "2024-01-01 to 2024-12-31".
Base64 Encoding
Encode and decode base64 strings directly in the notepad. Great for quick developer tasks.
Color Conversion
Convert between HEX, RGB, and HSL color formats. Type a color code and see all representations.
Global Hotkey
Summon Gauss instantly with Control+Space (customizable). It stays out of your way until you need it.
Auto-save
Your notepad is saved automatically. Pick up right where you left off every time you open Gauss.
Export & Copy
Copy individual results or export your entire notepad. Share calculations with your team effortlessly.
Every detail, polished.
Gauss unit conversion and natural language math
Gauss live currency conversion
Gauss developer tools — color, base64, hex
Gauss date arithmetic and math functions
One price. Yours forever.
Gauss
$4.99
Lifetime license
- Natural language math input
- 80+ unit conversions
- 170+ live currencies
- Developer tools (color, base64, hex)
- Smart autocomplete
- 3 devices per license
- Free updates forever
7-day free trial. No credit card required.
Gauss FAQ
Common questions about the notepad calculator for macOS.
How is this different from Numi?
Gauss is 4x cheaper ($4.99 vs ~$20), has developer-friendly features like color conversion, base64, and timestamp tools, and features a modern Liquid Glass design built for the latest macOS.
Does it work offline?
Yes, all calculations are instant and local. Only currency rates need internet, and they are cached for offline use.
What about AI calculators?
Gauss gives instant, deterministic results with zero latency. No waiting, no hallucinations, no internet required.
Can I customize the precision?
Yes, decimal precision (0-10), date format, font size, appearance mode, and hotkey are all configurable.
Is there a free trial?
Yes, 7-day free trial with full access. No credit card required.