Free tools

Financial Calculators

Three free calculators to turn your numbers into a clear, actionable picture. No login. No data collected. Everything stays in your browser.

Person using calculator on desk

50/30/20 Budget
Calculator

Enter your income and instantly see your personalised spending targets. Adjust the period to work with how you get paid.

Budget Split Calculator

Find your monthly needs, wants, and savings targets.

Your monthly budget targets
50% Needs
30% Wants
20% Savings

Emergency Fund Calculator

How much do you need saved, and how long will it take?

Your emergency fund plan
Goal amount
Still needed
Months to goal

Emergency Fund
Calculator

Your emergency fund is the foundation of financial security. Calculate exactly how much you need and how long it'll take to get there.

Savings & Investment
Growth Calculator

See the power of compound interest. Project your wealth based on current savings, monthly contributions, expected return, and time horizon.

Investment Growth Calculator

Project your portfolio value using compound interest.

Your projected wealth
Total balance
You contributed
Investment gains

Key financial benchmarks

Widely used rules of thumb from personal finance research and institutions.

MetricGuidelineSource
Emergency fund3–6 months of expensesCFPB standard
Housing costs≤ 28–30% of gross incomeMortgage industry rule
Retirement savings rate15% of gross income (incl. employer match)Fidelity / Vanguard
Debt-to-income ratio≤ 36% for total debt, ≤ 28% for housingLending industry
Total savings target (age 30)1× annual salaryFidelity benchmark
Dining out / restaurants5–10% of food budgetUSDA guidelines
Insurance (auto + home)4–6% of take-home payFinancial planner consensus
Safe withdrawal rate (retirement)4% of portfolio per yearTrinity Study (1998)