Ratio is a notepad calculator for macOS. Write your numbers like you would in a note. Prices, currencies, units, dates. The answer shows up on the right while you type.
macOS 13 or later · Free for 7 daysSplitting a bill, checking a quote, planning a trip. You write a line, Ratio puts the result next to it.
Over 160 currencies plus the big cryptos. Rates update by themselves, so you never have to look them up. You can even mix dollars, euros and pounds in the same line and it still works out.
See pricingCall something price and use it further down. Write L3 to pull in the result from line 3. Lists, fractions and small plots work too, if you need them.
See pricingKilometers to miles, Fahrenheit to Celsius, GB to MB. Ask what 3pm is in Tokyo, or how many days are left until a deadline.
See pricingI built Ratio because I kept opening a spreadsheet just to add up five numbers. Now I write them down and read the answer.
These results come straight from Ratio. The times and dates are live.
Regular money and crypto. Refreshed every hour and when your Mac wakes up.
Use L3 to reuse a result. Change it once and the lines below follow.
Add up a list, get the average or median, or draw sin(x) right there.
Type "until 18:00" or "until Christmas" and watch it count down.
14 themes, glass and frosted looks, in light or dark mode.
Run ratio "5 km in mi" and you get the same answer as in the app.
The same notepad handles taxes and loans, homework and the numbers developers deal with every day.
Type "1000 + VAT" or "1190 without VAT". Ratio uses your country's rate, or the one you set.
"pmt(5%/12, 360, 200k)" gives the monthly payment. "10k at 4% for 5 years" shows what it grows to.
"1 mar + 10 working days" skips weekends and public holidays for your country.
"solve x^2 - 5x + 6 = 0" answers x = 2 or x = 3. Integrals and derivatives work too.
Constants like c and G, complex numbers, mean and median. "isprime(91)" shows 7 × 13.
Hex and binary, "#FF8800 in rgb", "chmod 755", and "99.9% uptime", which allows 43 min 50 s a month.
There is just one version and it has everything. Use it free for 7 days. If you like it, you buy it once and it's yours.
Every license includes
Ratio is a notepad calculator for macOS. You type calculations as plain text, like "dinner 84 eur / 3", and the result appears next to each line as you type. It handles currencies, crypto, units, dates and time zones.
Ratio runs on macOS 13 Ventura or later.
Yes. All calculations run on your Mac. Exchange rates need a connection to refresh, and when you're offline Ratio uses the last rates it downloaded.
Yes. Turn on iCloud sync in settings and your sheets are kept in iCloud Drive › Ratio, so they show up on every Mac where you use Ratio.
Yes. Run ratio "5 km in mi" and you get the same answer as in the app.
Yes. You pay once and that's it. Updates are included.
After 7 days Ratio will ask you to buy a license before it calculates anything else. Your sheets stay on your Mac, nothing gets deleted, and they're all there once you activate.
Ratio downloads them on its own, every hour and whenever your Mac wakes up. If you're offline, it uses the last rates it got.
The app is in English, Romanian, German, French, Spanish and Italian. You can also write your calculations in any of these languages.
Yes. Type "1000 + VAT" or "1190 without VAT" and Ratio uses your country's rate, or one you set in settings. pmt, fv, pv, npv and irr work like in a spreadsheet, and you can also write "10k at 4% for 5 years". "1 mar + 10 working days" skips weekends and public holidays.
Yes. It solves equations like "solve x^2 - 5x + 6 = 0", does integrals and derivatives, and knows physical constants like c and G. It also handles complex numbers, statistics and prime numbers, and shows exact answers such as 2√2 when there is one.
Hex, binary and fixed-size integers like u8 and i32, colours ("#FF8800 in rgb"), file permissions ("chmod 755"), aspect ratios, Unicode characters and uptime budgets ("99.9% uptime"). The ratio command gives the same answers in Terminal.
In the app, open Ratio Pro and click “Deactivate this Mac”. Then enter the same key on the new Mac.
It's free for 7 days. If it doesn't click for you, no hard feelings.
