Math & Scientific
Ratio Calculator
Ratio Calculator is a browser-based calculator tool on CalcToolsBase. Free, browser-based Ratio Calculator with instant, clearly-labelled results. No signup, no uploads. To use it, enter your values and view the result directly in your browser — no signup and nothing to install.
Give Ratio Calculator your first number and second number and it returns the result straight away. Built to work through a calculation, it runs entirely on your device.
About this calculator
Ratio Calculator exists to work through a calculation with the least fuss. From your first number and second number it derives the result using the standard method, all on your device. There are no accounts, no adverts in the result, and nothing leaves your browser.
Made for students and anyone checking their working, it gives the result from your first number and second number in one step — clearly laid out, free to use, and computed entirely on your device.
How to use
- Enter the two numbers of the ratio.
- Press Calculate to run the ratio calculator.
- Read the result: the simplified ratio and its decimal value.
- Press Reset to clear the ratio calculator and start again.
Why use Ratio Calculator
Fast
Calculations run in your browser. No round trip to a server.
Private
Your inputs never leave your device. Nothing is uploaded.
Free
No signup, no paywall, no ads-in-results, no watermarks.
Accurate
Based on standard, well-established formulas.
Mobile-ready
Optimised for phones, tablets, and desktops alike.
Transparent
Honest disclaimers wherever browser limits or regional rules apply.
Common uses
Ratio in tutoring and teaching sessions
Ratio when working through problems
Ratio for understanding a formula's behaviour
Ratio in competitive-exam practice
Ratio in statistics and data coursework
Ratio when comparing two different methods
Technical notes
Ratio Calculator simplifies the ratio by dividing each term by their greatest common divisor, and can scale it to a missing term.
Inputs are taken exactly as entered, so check for typos before trusting an answer.
Results are rounded for display; the underlying calculation keeps full precision.
FAQ
What does the Ratio Calculator do?
It simplifies a ratio to its lowest terms — for example 12 : 18 becomes 2 : 3.
What do I enter in the Ratio Calculator?
The two numbers of the ratio (the first and second terms).
Does it show the decimal value?
Yes, it gives the simplified ratio and the ratio as a decimal.
Does the Ratio Calculator send my data to a server?
No — the Ratio Calculator runs entirely in your browser, so the numbers you enter never leave your device.
Worked example
Simplify 18:24 by dividing both by 6: 3:4.