Educational tools

Tools

Eighteen browser-based calculators expose user-entered assumptions, simplified formulas, outputs, and limitations.

Each tool models assumptions for education and does not recommend a financial decision.

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Each Learning Center lesson explains a concept in plain language and connects to the most relevant calculator.

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Tool catalog

Filter the complete library by practical area. All tools remain visible without JavaScript.

18 tools shown

First Job & Paychecks

Interactive Learning Tool

First Job Paycheck Planner

Model salary, pay frequency, withholding, and deductions.

Main inputs: Salary and deductions
Main outputs: Estimated take-home pay
Primary related lesson: Gross Pay vs. Net Pay

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Interactive Learning Tool

Pay Stub Decoder

Trace fictional pay-stub lines from gross to net pay.

Main inputs: Gross pay and deduction lines
Main outputs: Net pay and deduction share
Primary related lesson: Reading a Pay Stub

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Interactive Learning Tool

Withholding Impact Explorer

Compare two entered withholding assumptions.

Main inputs: Gross pay and two withholding scenarios
Main outputs: Per-check and annual differences
Primary related lesson: How Tax Withholding Works

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Interactive Learning Tool

Job Offer Comparison Tool

Compare compensation, selected benefits, and recurring work costs.

Main inputs: Two offer scenarios
Main outputs: First-year and ongoing differences
Primary related lesson: Workplace Benefits and Employer Match

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Spending & Saving

Interactive Learning Tool

Income & Expense Change Calculator

Compare two monthly income-and-expense scenarios.

Main inputs: Income and expense categories
Main outputs: Modeled margin change
Primary related lesson: Cash Flow Basics

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Interactive Learning Tool

Emergency Fund Planner

Explore cash-buffer targets under entered expense assumptions.

Main inputs: Selected essential expenses
Main outputs: Modeled coverage targets
Primary related lesson: Building an Emergency Fund

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Interactive Learning Tool

Savings Goal Timeline Calculator

Model a target, contribution, and completion timeline.

Main inputs: Target, balance, contributions
Main outputs: Modeled timeline
Primary related lesson: Savings Goals and Sinking Funds

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Interactive Learning Tool

Subscription Creep Calculator

See recurring monthly charges across one and five years.

Main inputs: Subscription categories
Main outputs: Monthly and annual totals
Primary related lesson: Understanding Subscription Costs

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Interactive Learning Tool

Periodic Expense Planner

Convert known non-monthly expenses into annual totals, monthly equivalents, and an optional due-month view.

Main inputs: Amount, annual frequency, optional due months
Main outputs: Annualized cost and monthly equivalent
Primary related lesson: Fixed, Variable, and Periodic Expenses

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Housing & Transportation

Interactive Learning Tool

First Apartment Cost Planner

Separate move-in and recurring apartment costs.

Main inputs: Housing and setup costs
Main outputs: First-month and monthly totals
Primary related lesson: First Apartment Costs Explained

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Interactive Learning Tool

Rent and Move-In Splitter

Model shared housing costs for two to six people.

Main inputs: Household costs and split method
Main outputs: Per-person shares
Primary related lesson: First Apartment Costs Explained

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Interactive Learning Tool

Car Ownership Cost Planner

Model vehicle costs beyond a monthly payment.

Main inputs: Payment, insurance, fuel, upkeep
Main outputs: Monthly and annual totals
Primary related lesson: The True Cost of Owning a Car

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Interactive Learning Tool

Commute Cost Calculator

Estimate one commute's entered cost and time, with an optional second scenario.

Main inputs: One commute; optional comparison
Main outputs: Daily, monthly, annual cost and hours
Primary related lesson: Cash Flow Basics

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Borrowing & Credit

Interactive Learning Tool

Student Loan Impact Calculator

Model principal, rate, term, and optional extra payment.

Main inputs: Balance, APR, term, payment
Main outputs: Payment and total cost
Primary related lesson: Student Loan Basics

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Interactive Learning Tool

Credit Card Interest Timeline

Model APR, payments, and a simplified balance timeline.

Main inputs: Balance, APR, payment
Main outputs: Months, interest, schedule
Primary related lesson: Credit Card Interest and Minimum Payments

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Inflation & Long-Term Growth

Interactive Learning Tool

Purchasing Power & Real Return Calculator

Compare nominal value with inflation-adjusted buying power.

Main inputs: Amount, years, inflation, return
Main outputs: Nominal and real values
Primary related lesson: Inflation and Purchasing Power

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Interactive Learning Tool

Cost of Waiting Calculator

Compare different start times in a compound-growth model.

Main inputs: Contribution, timing, assumed return
Main outputs: Scenario difference
Primary related lesson: Compound Growth and the Cost of Waiting

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Interactive Learning Tool

Simple vs. Compound Interest Explorer

Compare simple-interest growth with compound-interest growth using the same principal, rate, and time assumptions.

Main inputs: Principal, annual rate, years, compounding frequency
Main outputs: Simple and compound ending values, difference, and year-by-year table
Primary related lesson: Simple vs. Compound Interest

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