MoneyMath.tools
MoneyMath.tools

Find the calculator you need fast.

Pick a topic, then open the exact tool you want. No extra digging.

Practical money calculators for real financial decisions

MoneyMath.tools is built for people who want quick, useful answers before making everyday financial choices. Instead of forcing you through spreadsheets or bloated finance apps, the site gives you focused tools for borrowing, paychecks, budgeting, saving, and investing. Whether you are comparing a home loan, trying to understand your paycheck, or checking how fast savings could grow, the goal is the same: help you get to a clear number fast and understand what that number means.

If you are shopping for a home or testing affordability, start with the mortgage calculator to estimate your monthly payment. If you are evaluating a raise, job offer, or hourly work schedule, use the take-home pay calculator to estimate your net paycheck. For long-term planning, the compound interest calculator for savings growth and the debt payoff calculator to estimate your payoff date are two of the fastest ways to pressure-test a plan before you commit to it. Browse by topic below if you want to compare tools side by side and find the best fit for the exact money question you are working through.

Guides & explainers

Start with the framework

These pillar guides connect earlier-funnel questions to the calculators that help users test the decision with real numbers.

Explore all guides

Browse by topic

Start here

These groups are the fastest way to get users to the right tool.

Borrowing

6 tools

High-intent tools for financing decisions, debt tradeoffs, and major housing costs.

Income & Budgeting

4 tools

Simple calculators for paychecks, monthly planning, and everyday spending decisions.

Savings & Investing

4 tools

Evergreen tools for growth projections, saving targets, inflation, and long-term returns.

All calculators

Everything

Borrowing

Mortgage / Loan Calculator

Estimate monthly payments, total interest, and payoff costs before taking on new debt.

Borrowing

Auto Loan Calculator

Estimate your car payment, amount financed, total interest, and payoff savings before signing an auto loan.

Borrowing

Refinance Calculator

Compare a refinance offer against your current mortgage with payment savings, closing costs, and break-even timing.

Income

Take-Home Pay / Salary Calculator

Turn gross pay into a practical paycheck estimate with deductions and annual totals.

Everyday spending

Tip Calculator

Calculate a restaurant tip quickly and see the total bill without second-guessing the math.

Everyday spending

Split The Cost

Split a total amount evenly across a group and see what each person should pay.

Saving

Compound Interest Calculator

Project account growth with recurring contributions, compounding frequency, and time.

Saving

Savings Goal Calculator

Work backwards from a target amount and deadline to the monthly savings needed.

Debt

Debt Payoff Calculator

Estimate payoff dates and interest saved when you increase payments or reorder balances.

Debt

Credit Card Payoff Calculator

Estimate how long it could take to pay off a credit card, how much interest you may pay, and what payment is needed to hit a faster payoff goal.

Planning

Budget Breakdown Tool

Turn income into a simple spending plan across housing, food, savings, and flexible expenses.

Planning

Inflation Calculator

Compare buying power across years and understand how inflation changes real spending power.

Housing

Rent vs. Buy Comparison

Compare long-term housing costs with assumptions for rent growth, home prices, and ownership costs.

Investing

Investment Return Estimator

Estimate portfolio growth from starting balance, recurring deposits, and expected return assumptions.