Financial planning calculators

Runaway Finance

Each tool answers one question.

Plan the decision, not just the number.

Your finances change as life changes. Explore free calculators designed to answer practical financial questions — from whether your retirement savings could last, to when you may be able to stop working, how much raising a child could require, and whether everyday expenses could derail an important savings goal.

Free to use · No account required · Assumptions shown · Educational planning tools

Retirement planning

The flagship cluster. How long money lasts, how much you need, and when work can end.

Social Security and later life

Claiming age and later-life housing as their own questions.

Family and life planning

Readiness for a baby, then two nest eggs through 18 and university.

Savings and financial goals

Whether everyday expenses dissolve the pot you marked for one goal.