Essential calculators and tools for freelancers — estimate income tax, convert hourly rates to annual salary, generate invoices, and calculate profit margins. All free, no sign-up required.
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Calculate profit margin, markup, and selling price with batch analysis and industry benchmarks
Use tool →Calculate gross and net profit margins with markup comparison
Use tool →Convert between px, rem, em, pt, and other CSS units
Use tool →Encode and decode URL strings
Use tool →Convert between hourly wages and annual salary with overtime and benefits
Use tool →Convert hourly wage to annual salary with tax estimates and overtime
Use tool →Estimate US federal income tax with brackets, FICA, and take-home pay
Use tool →Convert salary between hourly, weekly, monthly, and annual with tax estimates
Use tool →See which tax brackets your income falls into with effective rate
Use tool →Create professional invoices and download as PDF
Use tool →Convert text to URL-friendly slugs
Use tool →Convert hourly wage to annual salary, understand tax deductions, and calculate your actual take-home pay. Includes federal and state tax breakdowns.
Read guide →Learn the 50/30/20 budgeting rule: 50% needs, 30% wants, 20% savings. Includes practical examples, adjustments for different incomes, and free calculators.
Read guide →Learn how sales tax works, how to calculate it, and which states have the highest and lowest rates. Includes exemptions, online sales tax rules, and a free calculator.
Read guide →Understand every line on your paycheck stub including federal tax, state tax, FICA, deductions, and net pay. Learn what you're being charged and how to verify accuracy.
Read guide →NexTool provides free tools tailored for freelancers including income tax estimators, hourly-to-salary converters, invoice generators, profit margin calculators, and self-employment tax calculators. All tools run in your browser with no account required.
Yes. Our invoice generator lets you create clean, professional invoices with your business details, line items, taxes, and payment terms. You can download them as PDF and send to clients immediately.
Use our income tax calculator and self-employment tax calculator to estimate your federal and state tax obligations. Enter your expected income and deductions to see what you may owe, including self-employment tax (Social Security and Medicare).
Professional-grade calculators for accountants — compute taxes, payroll, profit margins, depreciation schedules, and amortization tables. Instant results, completely free.
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