Ratio Calculator
Find a missing term of a ratio a:b = c:?, scale a value, or split a total.
Input Data
Solve / scale / split.
A
B
C
Total
Parts
Results
Computed result.
6
Explanatory note about the result.
2:3 = 4:6（d=6）
At a glance:a:b = c:d → d = b·c/a. Or split total into parts by the ratio. Complements proportion and percentage.
Formula
d = b·c/a.
part_i = total × (term_i / Σ terms).
How to Use
- Pick a mode and enter values.
- The tool returns the result.
Case Studies
split 100 in 1:3
25 and 75.
FAQ
Ratio vs fraction?
A ratio compares two quantities; a fraction is part of a whole.
Related Tools
References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.