Free Calculator Widgets for Your Website
Add clean, lightweight CalcJoy calculators to your site with a simple iframe. No accounts, no tracking, no fees.
Mortgage, debt and salary widgets that fit any article.
Percentage, discount and date math for classroom pages.
Hourly ↔ salary conversions for candidate-facing posts.
Recipe scaler and grocery budget widgets readers love.
Auto loan and pricing math for client landing pages.
Drop a calculator into any post with one snippet.
Available widgets
Percentage Calculator
Open calculator →Three modes: % of a number, X is what %, or increase by %.
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Free · noindex iframeAdd this calculator to your site. Copy the snippet — it works on any page with a simple iframe.
Discount Calculator
Open calculator →Sale price and savings after a % off.
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Free · noindex iframeAdd this calculator to your site. Copy the snippet — it works on any page with a simple iframe.
Business Days Calculator
Open calculator →Mon–Fri working days between any two dates.
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Free · noindex iframeAdd this calculator to your site. Copy the snippet — it works on any page with a simple iframe.
Hourly to Salary Calculator
Open calculator →Hourly rate → annual, monthly, weekly pay.
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Free · noindex iframeAdd this calculator to your site. Copy the snippet — it works on any page with a simple iframe.
Salary to Hourly Calculator
Open calculator →Annual salary → hourly and other pay periods.
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Free · noindex iframeAdd this calculator to your site. Copy the snippet — it works on any page with a simple iframe.
Debt Payoff Calculator
Open calculator →Months to debt-free and total interest.
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Free · noindex iframeAdd this calculator to your site. Copy the snippet — it works on any page with a simple iframe.
Mortgage Calculator
Open calculator →Monthly P&I, loan amount and total interest.
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Free · noindex iframeAdd this calculator to your site. Copy the snippet — it works on any page with a simple iframe.
Auto Loan Calculator
Open calculator →Car loan payment with tax, fees and trade-in.
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Free · noindex iframeAdd this calculator to your site. Copy the snippet — it works on any page with a simple iframe.
Recipe Scaler Calculator
Open calculator →Scale an ingredient up or down by servings.
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Free · noindex iframeAdd this calculator to your site. Copy the snippet — it works on any page with a simple iframe.
Grocery Budget Calculator
Open calculator →Weekly, monthly and annual grocery costs.
Embed this calculator
Free · noindex iframeAdd this calculator to your site. Copy the snippet — it works on any page with a simple iframe.
Frequently asked
Are the widgets free?
Yes — every CalcJoy widget is free to embed on any site, including commercial ones.
Can I embed them on my website?
Yes. Copy the iframe snippet on this page and paste it into any HTML, blog post or CMS that allows embeds.
Do they store user inputs?
No. Widgets run entirely in the visitor's browser. No accounts, no databases, no tracking of inputs.
Can I remove the CalcJoy attribution?
Please keep the small “Powered by CalcJoy” line — it lets readers find the full calculator and keeps the widgets free for everyone.
Will the widget size adjust on mobile?
Yes — widgets render responsively inside the iframe. The default 640px height fits most calculators on phones and desktops.
Can I request a new widget?
Yes — reach out from the Contact page with the calculator you want.