All Legal Calculators Tools
Alimony / Spousal Support Estimator
Estimate monthly spousal support payments based on income difference and marriage duration — for educational purposes only, not legal advice
Child Support Estimator
Estimate monthly child support payments using the income shares model — for educational purposes only, not legal advice
Estate Tax Calculator
Calculate federal estate tax liability instantly. Enter estate value, deductions, and filing status to see taxable amount, tax owed, and effective rate.
Personal Injury Settlement Estimator
Estimate your potential settlement range — for educational purposes only, not legal advice
Probate Cost Calculator
Estimate total probate costs by state. See attorney fees, executor fees, court costs, and miscellaneous expenses based on estate value.
Severance Pay & Tax Calculator
Calculate your gross severance, federal & state tax withholding, FICA, and net take-home amount based on salary, years of service, and filing status
Statute of Limitations Calculator
Find out when the statute of limitations expires for your legal claim. For informational purposes only - not legal advice.
Workers' Compensation Calculator
Estimate your weekly and total workers' comp benefits based on average weekly wage, state, disability type, and duration
Legal Calculators on FastTools are free, browser-based tools designed to help you get quick answers without signups or downloads. Every calculator runs entirely in your browser — your data never leaves your device.
Whether you're planning, budgeting, or just curious, these tools are built to be fast, accurate, and private. Pick any tool below to get started instantly.
Frequently Asked Questions
Are these legal calculators free?
Yes, every tool is completely free to use with no signup, no account, and no hidden fees.
Is my data safe?
Absolutely. All calculations run locally in your browser. No data is sent to any server or stored anywhere.
Do I need to create an account?
No. Every tool works instantly with no registration required. Just open and start using.