U.S. tools

These are the calculators on Danfio whose rules, tax treatment, industry or defaults come from the United States: federal and state income tax, payroll and self-employment tax, retirement accounts, FHA/VA and HUD programs, FICO scores, mortgage and consumer lending, credit cards and debt payoff, insurance products, ACA/COBRA/Medicare/HSA benefits, state family law, U.S. marketplace fee schedules and imperial units. Every tool the site files as U.S.-only appears on this page, once, under the category it lives in - which is why the page lists more of them than the curated financial hub does.

Read the answer on one of these pages as an estimate under the rule the page names, for the year it names. Change the tax year, the filing status, the state or the loan program and the answer moves with it, because the figure is computed from the rule rather than looked up from a table keyed to you.

Income & Payroll

Take-home pay, hourly rates, overtime and raises.

16 tools in this category

Business & Freelance

Invoicing, quoting, billable hours and the cost of running a business.

12 tools in this category

Taxes

Income tax, sales tax, capital gains and after-tax returns.

19 tools in this category

Investing & Savings

Compound growth, retirement targets and savings goals.

11 tools in this category

Everyday & Health

Dates, units, BMI and the small math of daily life.

3 tools in this category

E-commerce & Online Selling

Marketplace fees, product margins, ad break-even and inventory math.

9 tools in this category

How these calculators work

Every figure here comes from a rule that is written down somewhere: a bracket, a contribution limit, a benefit formula, a fee schedule or an income threshold. The page applies that rule to the numbers you enter rather than recalling an answer for you, so the same inputs always give the same output and you can check the single step you doubt.

The line between this page and the global hub is drawn on the tool, not on the category it sits in. A sales tax calculator is filed under Taxes and belongs here, because it applies a state rate you do not type; a VAT calculator is filed under Taxes but belongs on the global hub, because the rate is yours to enter and the arithmetic is the same in every country that charges one.

Nothing you type leaves the browser: a salary, a loan balance, a credit report figure or a benefit amount is computed in the tab and never uploaded, so these pages are usable for numbers you would not paste into a form. Federal, state and local rules disagree with each other and change between years - check the year a page states before you act on its result.

Where the country-neutral tools live

Calculators that give the same answer in any country - PDF, image and file utilities, text and developer tools, date, unit and health arithmetic, and the business, selling and everyday formulas whose numbers you supply - are collected on the global tools hub, because none of them needs a U.S. tax rule, a U.S. fee schedule or an imperial default to work.

Global tools

Disclaimer

This page is an index, not advice: every calculator it links to is an estimate from the numbers you enter, and none of them is financial, tax or legal advice.

Every tool here processes your data locally in your browser. See the full disclaimer for the limits that apply across the site.

Read the full disclaimer.