Simplify ratios to their lowest terms, solve proportion equations (A:B = C:D), and divide any amount into ratio splits. All in one powerful tool.
3 : 4
Simplified from 45 : 60
GCD(45,60) = 15 → 45÷15 : 60÷15 = 3:4
:
:
2 : 3 = 8 : 12
D = 12
Cross multiply: d = (8 × 3) ÷ 2 = 12
₹200
Part 1 (2)
₹300
Part 2 (3)
₹500
Part 3 (5)
Total parts = 10, Each part = ₹100
About TooliFyra Ratio Calculator Online Free
TooliFyra's Ratio Calculator Online Free is a versatile tool that handles all your ratio needs. Simplify ratios to their lowest terms, solve proportion equations (A:B = C:D), and divide any amount into a specified ratio split — all with this ratio calculator online free.
Ratios are fundamental in mathematics, finance, and everyday life. Our calculator makes working with them intuitive and error-free.
Key Features
Ratio SimplifierReduce any ratio to its simplest form using GCD.
Proportion SolverSolve A:B = C:D for any missing variable.
Amount SplitDivide a total amount into specified ratio parts.
How to Use Ratio Calculator
Select a mode: Ratio Simplifier, Proportion Solver, or Ratio Split.
For Simplifier: enter ratio values separated by commas or colons.
For Proportion: fill any 3 of the 4 fields (A, B, C, D) — leave one blank.
View the result instantly with the method explanation.
Benefits
Students can solve ratio and proportion problems, and business owners can split profits or expenses by ratio. The ratio calculator online free runs 100% in your browser with instant results.
Use Cases
Students — solve ratio and proportion math problems. Business Owners — split profits, expenses, or investments by ratio. Chefs — scale recipes up or down while maintaining proportions.
Why TooliFyra?
TooliFyra's Ratio Calculator Online Free provides three essential ratio tools in one interface — simplification, proportion solving, and amount splitting — all completely free and private.
Frequently Asked Questions
Find the GCD of all numbers and divide each by the GCD. For example, 45:60 has GCD 15, so simplified = 3:4.
Cross-multiply: if A:B = C:D, then A×D = B×C. Enter any 3 values and the 4th is calculated automatically.
Yes, the simplifier and split modes support multiple ratio values (e.g., 2:3:5).
Yes, completely free with no usage limits. All calculations happen in your browser.
Worked example: simplifying 12:16 and solving 3:4 = 9:x
Simplify 12:16. In Ratio Simplifier mode, type 12:16. The calculator finds GCD(12, 16) = 4 and divides both sides by 4, giving 3:4. The method line under the result shows the working: "GCD(12, 16) = 4 → 12÷4 : 16÷4 = 3 : 4".
Solve 3:4 = 9:x. In Proportion Solver mode, enter A = 3, B = 4 and C = 9, and leave D blank. Cross-multiplying gives 3 × D = 4 × 9, so D = 36 ÷ 3 = 12. If you fill in all four boxes instead, the tool checks the proportion for you: 3/4 = 0.75 and 9/12 = 0.75, so it reports "Proportion is correct!".
Input formats and limits
Ratio Simplifier: type whole numbers separated by spaces, commas, semicolons or colons — for example 12:16, 12, 16 or 2 3 5. At least two numbers are needed.
Proportion Solver: enter any three of A, B, C and D and leave the fourth blank. Decimals are accepted here, so 2.5 : 4 = 5 : 8 works (2.5/4 = 5/8 = 0.625).
Ratio Split: enter one amount and the ratio parts to divide it by, for example 2:3:5. The split and simplifier modes both accept more than two numbers.
Values must be greater than zero. Zero and negative numbers are dropped in Simplifier mode and treated as blank in Proportion Solver.
Decimals are cut to whole numbers in Simplifier mode (2.5 becomes 2), so 2.5:5 is simplified as 2:5. Use Proportion Solver when the decimal part matters.
Results update live as you type, and every calculation runs in your browser — nothing is uploaded.
Common errors and what they mean
"Enter at least 2 numbers" — the Simplifier received fewer than two usable values. Check for typos, and remember that zero and negative numbers are dropped, so 0:8 counts as a single number.
"Fill 3 values" — the Proportion Solver needs exactly three filled boxes. Leave one box empty to solve for it, or fill all four to check whether a proportion is valid.
The proportion checker says the proportion is not valid — all four boxes are filled but A/B does not equal C/D. For example, 3:4 = 9:13 fails because 3/4 = 0.75 while 9/13 ≈ 0.69.
A decimal ratio changes after simplifying — this is not an error: Simplifier mode truncates decimals to whole numbers, so 2.5 becomes 2. Enter the ratio in Proportion Solver instead if the decimal matters.
Letters in the ratio box — letters are ignored, so typing a:b is the same as entering nothing and shows "Enter at least 2 numbers".
Explore more Ratio Calculator-adjacent tools in our suite. Processing varies by tool. Many file tools work in your browser; tools that use live data or external APIs may send a query to another service. Review the tool instructions and Privacy Policy.
