Everyday life
Ratio and proportional allocation Calculator
Split a euro amount between any non-negative ratio weights, including signed refund amounts. This free ratio and proportional allocation calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Split a euro amount between any non-negative ratio weights, including signed refund amounts.
Calculated outcomes
- Ratio Weight Total
- 5
Allocations · 2 rows
| Share | Weight | Amount |
|---|---|---|
| 1 | 2 | €48.00 |
| 2 | 3 | €72.00 |
Assumptions and estimates
- Shares retain full precision internally. Display rounding can leave a one-cent reconciliation difference; no hidden remainder is assigned. Negative totals are allowed for refunds or adjustments.
- Method: Each share = total amount × its ratio weight / sum of all weights. Keep unrounded shares internally.
- Enter at most 100 non-negative weights with a positive sum. Zero weights receive zero; negative totals represent refunds/adjustments. Display rounding can leave a one-cent reconciliation difference.
Useful next steps
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the ratio and proportional allocation calculation works
Each share = total amount × its ratio weight / sum of all weights. Keep unrounded shares internally.
Enter at most 100 non-negative weights with a positive sum. Zero weights receive zero; negative totals represent refunds/adjustments. Display rounding can leave a one-cent reconciliation difference.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review allocation summary and allocated total, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Amount to allocate (€)
- 120
- Ratio weights separated by colon, comma or space
- 2:3
- Allocation Summary
- Share 1: €48.00; Share 2: €72.00
- Allocated Total
- €120.00