Net worth percentile by age (Federal Reserve data) and retirement savings calculators. Free.
Scored across 4 tools
The net worth tools are clearly distinct: one gives age-group statistics and the other ranks a specific net worth. The retirement tools are inverses (income from savings vs savings needed for spending), so they could be briefly confused, but their names and argument descriptions make the direction clear.
All names use consistent snake_case and descriptive domain-prefixed phrasing. The set does not follow a strict verb_noun pattern, but for calculator-style tools the output-oriented naming is predictable and readable.
Four focused calculators are well-scoped for a money-calculator server. Each tool covers a distinct calculation and there are no redundant or filler tools.
The surface covers core net worth distribution/percentile questions and retirement planning in both directions: savings to income and income to required savings. Minor gaps such as explicit projection or assumption inputs exist, but the main workflows are covered.
Median, average and top-percentile net worth for US families by age.
Args:
age: optional. Give an age for that age group's full breakdown
(percentiles, homeowners vs renters); omit it for every age group.
Inputs: age.
Where a net worth ranks among US families whose head is the same age group.
Args:
age: the person's age (18-110).
net_worth: total assets minus total debts, in US dollars (can be negative).
Inputs: age (required), net_worth (required).
How much a nest egg can sustainably pay out per year from a retirement age to 95.
Args:
savings: total retirement savings in US dollars (10,000-50,000,000).
retirement_age: age at retirement (40-80).
Inputs: savings (required), retirement_age (required).
How much someone needs saved to retire at an age and spend a yearly amount.
Args:
retirement_age: age at retirement (40-80).
annual_spending: all-in yearly spending in today's dollars (5,000-1,000,000).
Inputs: retirement_age (required), annual_spending (required).
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US retirement calculators with every number cited to official SSA and Medicare sources.
Retirement drawdown, 72(t) SEPP, RMD, Roth conversion, Social Security and state-tax calculators.
FIRE & retirement calculators + a multi-currency portfolio rebalancer (exact buy/sell trades).
Free money calculators: growth, retirement, mortgage, inflation, debt. Not financial advice.
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