Calculators for the money you share
Three practical tools, each with a worked example and the reasoning behind the maths. Run them here in the browser, then carry the numbers into your shared dashboard.
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Income-Proportional Bill Split Calculator
Two salaries, one rent. See the exact fair share of every shared bill, and what each partner has left afterwards.
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Wedding Budget & Guest Cost Estimator
Model guest count, venue, catering and a contingency cushion before you book anything, with a true cost per guest.
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Couples 50/30/20 Budget Calculator
Combine both incomes into needs, wants and savings, then divide each bucket by income so nobody feels short-changed.
Why put the maths first?
Most money arguments between partners are not about values, they are about unspoken arithmetic. One person is quietly doing the sums in their head and concluding they are being treated unfairly. Writing the number down, in the same place, with the same inputs, turns a feeling into a decision you can both see.
These calculators are deliberately plain. No signup, no account, no sync. If you want the numbers to live somewhere, the income splitter can hand them to your private dashboard where they stay in your browser.