Free financial planning tools
SMO Financial Calculator
Turn everyday money questions into clear numbers. Calculate loans, savings, taxes, salary, percentages, and discounts with transparent formulas.
Calculator directory
Plan every side of your finances
Loan Calculator
Estimate monthly loan payments, total interest, and the full repayment cost with a clear principal-versus-interest breakdown.
Calculate nowSavings Calculator
Project how your savings can grow with an opening balance, regular deposits, interest, and time.
Calculate nowTax Calculator
Estimate income tax with a configurable tax rate and deductions, then see your effective rate and after-tax income.
Calculate nowSalary Calculator
Convert pay between hourly, weekly, monthly, and annual amounts and estimate take-home income after deductions.
Calculate nowPercentage Calculator
Solve common percentage questions, including percent of a number, percentage change, and part-to-whole ratios.
Calculate nowDiscount Calculator
Calculate a sale price, stacked discounts, tax, and your total savings before you buy.
Calculate nowFinancial education
Understand the numbers behind your money
Income & Salary · 8 min
How Salary Calculations Work: From Hourly Rate to Take-Home Pay
Understand how gross salary, hourly pay, deductions, and net income connect, with worked examples you can repeat using a salary calculator.
Income & Salary · 7 min
Gross vs Net Income Explained in Plain Language
Learn the difference between gross and net income, why it matters for budgeting and borrowing, and how to calculate each accurately.
Taxes · 9 min
Understanding Taxes: A Beginner's Guide to Income Tax
A clear introduction to income tax, taxable income, deductions, brackets, and effective versus marginal tax rates, with simple examples.
Taxes · 7 min
Marginal vs Effective Tax Rate: Why a Raise Never Costs You Money
Learn how marginal and effective tax rates differ, debunk the tax bracket myth, and see how to use each rate when planning your finances.
Income & Salary · 8 min
How to Negotiate a Higher Salary Using Real Numbers
Prepare for salary negotiation with market research, take-home pay calculations, and total compensation comparisons that strengthen your case.
Saving · 9 min
Saving Money Effectively: 12 Habits That Actually Work
Practical, research-backed habits for saving money consistently, from paying yourself first to automating transfers and cutting big recurring costs.
Frequently Asked Questions
- Yes. Every calculator is free, requires no account, and can be used as often as you need.
SMO Money Brief
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