Free Tools

Do the Math on Your Money

Three calculators that update as you type. No signup. Your numbers never leave your browser.

Budget Planner

Live donut updates as you slide.

Monthly Income

USD

Housing$1,500

Food$600

Transport$400

Utilities$250

Fun$300

Saving$800

Total spent$3,850

Savings rate16%

Remaining$1,150

See your debt-free date and total interest.

Debt balance

USD

Interest rate

Monthly payment

USD

Method

With a single debt, both methods produce the same payoff curve.

Payoff date

Sep 2029

Years

3.3

Total interest

$3,417

Visualize how contributions vs growth split over time.

Initial amount

USD

Monthly contribution

USD

Annual return: 8%

Years: 30

Final value

$458,044

Contributed

$109,000

Interest earned

$349,044