Free Financial Calculators
Smart tools for shared finances. Calculate fair splits, track subscriptions, plan budgets, and visualize your cash flow.
Fair Share Calculator
Split shared expenses proportionally based on income. Perfect for couples, roommates, and families with different earnings.
Subscription Calculator
See the true cost of all your subscriptions. Monthly, yearly, and 5-year totals. Find savings by sharing plans.
50/30/20 Budget Calculator
Plan your budget with the proven 50/30/20 rule. Allocate income to needs, wants, and savings. Works for couples too.
Cash Flow Diagram
Create interactive Sankey diagrams to visualize where your money goes. See the complete flow from income to expenses.
Savings Calculator
Calculate how your savings grow over time with compound interest. Set goals and see how long until you reach them.
Rent Split Calculator
Split rent and utilities fairly among roommates based on room size and features like private bathroom or balcony.
Retirement Depot Calculator
German Altersvorsorgedepot (AVD) vs. ETF: Compare government subsidies, tax advantages and inflation-adjusted returns.
Why Use Financial Calculators?
Managing shared finances doesn't have to be complicated. Our free calculators help you make fair decisions about money, whether you're splitting rent with a roommate, planning a family budget, or tracking subscription costs.
Each tool is designed to give you instant clarity. No sign-up required, no hidden costs. Just enter your numbers and get actionable results.
Which Calculator Is Right for You?
Couples with different incomes: The Fair Share Calculator splits expenses proportionally based on what each person earns. Instead of a 50/50 split, it calculates a fair ratio so neither partner feels overburdened. Enter both incomes and your shared costs to see the breakdown instantly.
Roommates sharing an apartment: The Rent Split Calculator divides rent based on room size, natural light, private bathrooms, and other features. It considers what each person actually gets from the apartment, not just an equal split.
Tracking monthly subscriptions: Use the Subscription Calculator to list all your recurring payments. It reveals the true annual and 5-year cost, which is often surprising. Many users discover they spend hundreds more than expected on streaming, software, and memberships.
Planning a household budget: The 50/30/20 Budget Calculator applies the popular budgeting framework to your income. It splits your earnings into needs (50%), wants (30%), and savings (20%), helping you identify where to cut back and where you're already on track.
Visualizing cash flow: The Cash Flow Diagram creates interactive Sankey charts that show exactly where your money goes each month. Seeing the flow from income to categories like rent, food, and entertainment makes it easy to spot imbalances.
Building long-term savings: The Savings Calculator shows how compound interest grows your money over time. Set a goal amount and see how different monthly contributions and interest rates affect when you'll reach it.
All calculators work entirely in your browser. Your data is never sent to a server, and you can use every tool as often as you like without creating an account.
For automatic tracking, shared budgets, and real-time insights across all your finances, download the GoodShare app.
Want Automatic Financial Tracking?
GoodShare tracks expenses, splits costs, and manages budgets in real-time. Share with your partner, roommates, or family.
Try GoodShare Free