Financial calculators
Free calculators for budgeting, income, spending, savings, and debt. Every tool runs in your browser, explains its formula, and states its assumptions.
Budget
Plan your monthly income and expenses and see where every dollar goes.
Budget Calculator
See your monthly cash flow at a glance: total income, total expenses, remaining balance, savings rate, and a category-by-category breakdown.
Monthly Budget Calculator
Plan a monthly budget with custom categories, then track actual spending against each one. See your planned surplus, over/under status, and variance.
Weekly Budget Calculator
Plan your weekly cash flow: weekly spending, weekly remaining budget, and the true monthly equivalent (× 52 ÷ 12) so weekly and monthly views stay consistent.
50/30/20 Budget Calculator
Split your after-tax income with the 50/30/20 rule: dollar amounts for needs, wants, and savings — with adjustable percentages if the classic split doesn’t fit.
Household Budget Calculator
Combine every income source and compare against shared expenses — housing, food, childcare, and more — to see the household’s monthly surplus or deficit.
Income
Convert pay between hourly, weekly, monthly, and annual amounts.
Hourly to Salary Calculator
Convert an hourly wage into weekly, biweekly, semimonthly, monthly, and annual pay — with the 26-vs-24 pay period difference explained.
Annual Salary Calculator
Convert between hourly, weekly, biweekly, semimonthly, monthly, and annual pay. Enter any one amount and see every other frequency, gross.
Expenses
Understand your spending patterns and convert between time periods.
Spending Calculator
Convert any habitual expense between daily, weekly, monthly, and annual amounts. See the yearly total that small habits hide.
Income vs Expenses Calculator
Compare everything coming in against everything going out. Unlimited income and expense lines, net cash flow, savings rate, and a side-by-side chart.
Savings
Set goals, build emergency funds, and project compound growth.
Savings Goal Calculator
Find the exact monthly or weekly contribution to reach any savings goal by your target date — with interest on current savings included in the math.
Emergency Fund Calculator
Size your emergency fund from your real essential expenses. Compare 3, 6, and 12-month cushions, see the remaining gap, and turn it into a weekly savings plan.
Compound Interest Calculator
Project how your savings grow with compound interest. Enter a starting balance, regular contributions, rate, and horizon to see interest earned year by year.
Savings Rate Calculator
Calculate your savings rate in seconds: the share of income you keep, dollars saved per year, and where your number sits on the path to financial independence.
Financial Independence Calculator
Project the portfolio size and the date you reach financial independence: your FI number, time to FI, and the savings rate that drives the timeline — 4% rule math explained.
Debt
Estimate payoff timelines, interest costs, and loan payments.
Debt Payoff Calculator
Project your debt payoff date and total interest for any monthly payment. Add an extra payment and see exactly how many months and dollars it saves.
Credit Card Interest Calculator
See how long a credit card balance takes to pay off and what it costs at any payment level — with the daily-balance method issuers actually use explained.
Loan Payment Calculator
Calculate the monthly payment, total interest, and amortization for any fixed-rate loan — auto, personal, or mortgage. Supports zero-interest loans.
All 17 calculators run entirely in your browser — nothing you enter is sent to a server.