WorkbookBarn

Embed a Free Calculator on Your Site

Copy-paste embed codes for 39 free, tested calculators — finance, real estate, contractor math. Free forever, attribution optional.

Add a working, tested calculator to your site in 30 seconds. Free forever. No signup, no branding takeover, no ads. Copy the snippet, paste it into any page — WordPress, Squarespace, Wix, LibGuides, plain HTML — and your readers get a live calculator that runs entirely in their browser.

How it works

  1. Copy the two-line embed code for the calculator you want (buttons below).
  2. Paste it anywhere HTML is accepted — a post, a resource page, a course page.
  3. Done. We host it, we test it, we maintain it. The one-line credit under the frame is yours to keep, edit down, or delete — see the license.

Live example

This is the Net Worth Tracker embedded with the exact snippet you would copy:

The most-asked-for calculators

Net Worth Tracker

“Net worth calculator” is searched ~22,000×/month. Assets minus liabilities, grouped the way a lender reads them.

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Markup & Landed Cost Calculator

“Markup calculator” — ~18,000 searches/month. Landed cost, markup vs margin, and the sell price that actually protects the job.

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RENTAL PROPERTY DEAL ANALYZER

Rental property + cap-rate math in one screen: cash flow, cap rate, cash-on-cash, the numbers a deal lives or dies on.

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Debt Payoff Tracker

Debt snowball / avalanche payoff plan — order, payoff dates, interest saved.

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Emergency Fund Builder

How many months of real expenses you are holding, and the monthly saving that closes the gap.

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Commission Ladder

Commission tiers for sales teams — what each rep earns at each rung, and what it costs you.

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Budget by Paycheck

A budget built the way people are actually paid — per paycheck, not per calendar month.

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Savings Goal Tracker

Target, deadline, and the monthly number that gets there.

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Contractor Break-Even & Cash Model

The revenue a trade business must bill per month before profit exists — overhead, crew cost, utilization.

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Sub-Labor Rate Card & Job Packet

What a sub or crew hour really costs loaded — base, burden, insurance, the lot.

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Job Settlement Sheet

Job-level P&L: contract price minus materials, labor, subs and commissions — what the job actually made.

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SOP Builder Kit

Turn a task someone carries in their head into a written SOP a new hire can follow.

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CRE Loan Underwriting Screener

Commercial loan screen: DSCR, LTV, debt yield — pass/fail before you call a lender.

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Expense Tracker

Plain expense log with category totals — the habit every other calculator here depends on.

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All 39 calculators, A–Z

Every free calculator on this site can be embedded the same way.

1031 Exchange Timeline & Identification Tracker

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12-Month Contact Cadence Planner

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90-Day Prospecting Planner

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Agent Production Planner

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Annual Agent Business Plan

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Bill Payment Tracker

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Budget by Paycheck

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Client Campaign Tracker

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Cold Call Pipeline Tracker

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Commission Ladder

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Content Calendar Planner

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Contract to Close Tracker

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Contractor Break-Even & Cash Model

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CRE Due Diligence Tracker

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CRE Loan Underwriting Screener

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Debt Payoff Tracker

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Emergency Fund Builder

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Employee Onboarding Checklist

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Equity Waterfall & Promote Calculator

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Expense Tracker

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Job Settlement Sheet

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License & Continuing Education Tracker

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Listing Marketing Plan Tracker

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Luxury Listing Launch Planner

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Markup & Landed Cost Calculator

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Net Worth Tracker

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Project Task Tracker

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RENTAL PROPERTY DEAL ANALYZER

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Savings Goal Tracker

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Small Business Startup Checklist

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SOP Builder Kit

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Sphere of Influence Tracker

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Sub-Labor Rate Card & Job Packet

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Subcontractor Insurance & W-9 Compliance Tracker

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Subcontractor Vetting Scorecard

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Subscription Audit

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The Contractor’s Weekly Scorecard

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Weekly Operations Review

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Weekly Sales Activity Planner

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Why embed one?

  • It works. Each calculator is generated from the same tested spreadsheet model as the workbook it comes from — the formulas are verified against expected outputs before anything ships.
  • Nothing to maintain. We host it. Bug fixes and improvements reach your page automatically.
  • No strings for your readers. No signup wall, no ads, no email capture inside the frame, and nothing a visitor types is sent anywhere.
  • The fine print is handled. A plain-English liability disclaimer is built into every frame, so an embedded calculator never leaves your page implying financial advice.

The license, in plain English

  • Free to embed on any site, commercial included, for as long as you like.
  • The credit line is optional. “Calculator by WorkbookBarn” under the frame is appreciated — it is how other site owners find these — but you may delete it, and you may add rel="nofollow" to the link if that is your site’s policy. Embedding is never conditional on a link.
  • If you keep the credit, leave the anchor text as our name (“WorkbookBarn”). Please don’t change it to keyword text — Google’s link-spam guidelines treat keyword-rich widget links as spam, and we don’t want that for your site or ours.
  • No hidden links, ever. The snippet contains exactly one visible link and we will never add concealed ones.
  • Don’t present a calculator as your own product, charge for access to it, or overlay it with ads styled to look like part of the tool.
  • The disclaimer inside the frame stays visible — it protects you as much as us.

Want a calculator we haven’t built?

Tell us what your readers keep asking for — a trade, a formula, a worksheet — and if it fits the barn we will build and test it: hello@workbookbarn.com. Or leave your email and you’ll hear when new ones ship:

Get the next free tool

One email when a new free calculator or trade guide ships. No spam, unsubscribe anytime.

Questions

Is it really free?

Yes. Every calculator is free to embed, free for your visitors, and stays free. No trial, no tier, no ads inside the frame, and we never collect your visitors’ emails through it.

Do I have to keep the credit line?

No. The one-line “Calculator by WorkbookBarn” credit under the frame is appreciated but entirely optional — remove it if you prefer, or keep it and add rel="nofollow" to the link. If you do keep it, please leave the link text as our name rather than changing it to keyword text; brand-name attribution is what Google’s guidelines expect from embedded widgets.

Can I use it on a commercial site?

Yes — business sites, client sites, resource pages, course pages, intranets. The only things we ask: don’t present the calculator as your own product, don’t charge for access to it, and don’t overlay it with ads that look like part of the tool.

Do my visitors’ numbers get sent anywhere?

No. The math runs entirely in the visitor’s browser — nothing typed into a calculator is transmitted or stored. The frame loads Google Analytics only so we can count which calculators are being used.

What if my page is narrow — will it break?

The frame is responsive down to phone widths. The height in the snippet is measured at a typical 800px article column; on very narrow columns the calculator may scroll inside the frame, which is normal.

Will the calculator change under me?

We fix bugs and improve formulas over time and your embed picks that up automatically — that’s the point of an embed. We don’t change what a calculator is or swap it for something else at the same URL.

Educational estimates only. These calculators and workbooks do the arithmetic on the figures you enter; they are general-purpose tools, not financial, investment, tax, legal, lending, insurance or construction advice, and no result is a quote, an offer, or a guarantee of any outcome. Results depend entirely on your inputs and assumptions.