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Free calculators for your website

For bloggers, local news sites, libraries and legal-aid organizations: 25 free calculators you can put on your own pages with one copy-paste, each with a live preview below.

Free, no sign-up. Pick a calculator, copy its code and paste it into any page that accepts HTML (WordPress "Custom HTML" block, Squarespace or Wix code block, a library guide, a news story). It runs in your visitor's browser, nothing they type is sent anywhere, and the frame loads no ads or tracking.

How it works

  • One frame, one line of credit. The code is a frame showing the calculator, a line under it reading "Calculator by MCC Solutions", and a few lines of script that size the frame to fit.
  • The credit link is your choice. It's a plain link with our name as the text, never keyword text and never hidden. Keep it, remove it or mark it nofollow; the calculator works the same.
  • Always current. When a tax year, limit or state rule changes, the calculator on your page updates with ours.
  • Phone friendly. Every calculator fits a 390-pixel phone screen without sideways scrolling.

Legal help, tenants and consumers

Legal-aid sites, tenant groups, court-help pages and consumer blogs

Small claims limit checker

Pick a state and an amount to see whether it fits that state's small claims limit, from the official court pages. Full page

Live preview

Security deposit return deadline

The last day a landlord has to return a deposit or send the itemized list, by state, with the statute. Full page

Live preview

Debt collector dispute deadline

The 30-day validation window under the FDCPA and Regulation F, counted from the notice date. Full page

Live preview

Which bills come first?

Puts a short month's bills in order: housing, utilities, food and transport before unsecured debt. Full page

Live preview

Right-to-cancel (rescission) calculator

The last day to cancel a refinance or home equity loan under Regulation Z. Full page

Live preview

Household money

Libraries, credit unions, community groups and personal finance blogs

Debt payoff calculator

Avalanche or snowball, the debt-free date and the interest saved. Full page

Live preview

Emergency fund calculator

How much to keep aside and how long it takes to get there. Full page

Live preview

2027 Marketplace premium tax credit estimator

The expected contribution toward a benchmark Marketplace plan for 2027. Full page

Live preview

Medicare Part D out-of-pocket cap tracker

How close someone is to the yearly Part D cap, month by month. Full page

Live preview

Mortgage payment calculator

Monthly payment with property tax and insurance. Full page

Live preview

Prorated rent calculator

Rent for a partial month at move-in or move-out. Full page

Live preview

Workers and taxes

Worker centers, tax-help clinics and newsrooms covering the new deductions

Tips deduction calculator

The federal deduction for qualified tips, 2025 to 2028, with the income phase-out. Full page

Live preview

Overtime deduction calculator

The overtime premium that can be deducted, 2025 to 2028. Full page

Live preview

Car loan interest deduction checker

Whether car loan interest qualifies for the new deduction, and how much. Full page

Live preview

Mileage deduction calculator

Standard mileage rate or actual costs, side by side. Full page

Live preview

Time card calculator

Hours worked and pay from start and end times. Full page

Live preview

Small business

Small business blogs, chambers of commerce and SBDC pages

LLC annual report due date

The next annual or biennial report date and fee for an LLC in any state. Full page

Live preview

Sales tax threshold checker

Compares an online seller's sales and orders with each state's remote seller threshold. Full page

Live preview

Quarterly estimated tax calculator

Each quarterly payment and the safe harbor amount. Full page

Live preview

1099 deadline calculator

When each 1099 is due to recipients, the IRS and New Jersey. Full page

Live preview

Employee cost calculator

What a hire really costs once payroll taxes and benefits are added. Full page

Live preview

New Jersey

New Jersey local news sites, town pages and libraries

NJ property tax calculator

Any of New Jersey's municipalities, at the State's published general tax rate. Full page

Live preview

En español

Sitios en español: bibliotecas, centros de trabajadores y medios locales

Calculadora de la deducción por propinas

La deducción federal por propinas calificadas, 2025 a 2028. Página completa

Vista previa

Calculadora de la deducción por horas extras

La parte deducible del pago de horas extras, 2025 a 2028. Página completa

Vista previa

Crédito tributario de prima 2027

La contribución esperada para un plan del Mercado en 2027. Página completa

Vista previa

Need a calculator that isn't here? Most of our free tools that run in the browser have their own embed code at the bottom of the page. Questions: contact us.

Common questions

Is it really free?

Yes. There's no sign-up, no key and no fee, and the calculators carry no ads. Paste the code and it works.

Do I have to keep the credit link?

No. We'd appreciate it, and it helps people find the full page with sources and explanations, but the calculator works without it. You may remove the link or add rel="nofollow" to it (tick the box above to get that version of every snippet).

What does the credit link say?

Only "Calculator by MCC Solutions", with MCC Solutions as the link text. It points at the calculator's full page on our site. It's never keyword text and never hidden.

Does anything my visitors type get sent to you?

No. The calculators run in your visitor's browser and nothing they enter is sent or saved. The embedded frame loads no analytics or advertising scripts.

Why include a short script?

So the frame grows and shrinks with the calculator's result instead of showing a scroll bar. It's a few lines that only listen for a height message from our site; there's nothing to download. If your site strips scripts, leave it out and the frame uses its fixed height.

Will the calculator stay up to date?

Yes. The frame always shows the current version, so new tax years, limits and state rules appear on your site as soon as we update them.

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