UnitCalcPro

Free Converter and Calculator Widgets

Add any of our 25 unit converters or 39calculators to your website, blog or class page. Copy the code, paste it into your page, and it works. There's no sign-up, and the widget shows no ads.

What it looks like

This is the length converter widget, live:

How to add a widget

  1. Find the converter or calculator you want below and open it.
  2. Click Copy code.
  3. Paste the code into your page where you want the widget, using your site's HTML or embed block.

Unit converter widgets

Length Conversion Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Temperature Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Weight & Mass Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Volume Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Area Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Speed Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Time Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Pressure Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Force Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Torque Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Energy Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Power Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Density Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Data Storage Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Angle Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Acceleration Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Flow Rate Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Frequency & Wavelength Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Illumination Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Viscosity Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Magnetic Field Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Magnetic Flux Density Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Radiation Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Resistance & Conductance Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Surface Tension & Heat Flux Converter

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Calculator widgets

Mortgage Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Loan Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

EMI Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Simple Interest Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Auto Loan Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Interest Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Investment Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Retirement Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Budget Planner

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Debt Payoff Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Home Affordability Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Debt-to-Income Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Child Education Planner

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Forex Profit Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Savings Goal Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Net Worth Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Vacation Budget Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

BMI Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

BMR Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

TDEE Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Calorie Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Body Fat Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Ideal Weight Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Macronutrient Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Pregnancy Due Date Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Ovulation Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Heart Rate Zone Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Blood Pressure Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Waist-to-Hip Ratio Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Sleep Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Percentage Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Scientific Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Heat Capacity Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Thermal Properties Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Charge & Current Density Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Age Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

GPA Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Sales Tax Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Tip Calculator

Free for any website, blog or class page. Paste this HTML where you want the tool to appear.

Frequently Asked Questions

Is it really free?
Yes. You can embed any converter or calculator on any site, including commercial sites, without signing up or paying.
Will the widget show ads or track my visitors?
No. Embedded widgets load no ads and no analytics. They only run the converter or calculator itself.
How do I add it to WordPress or Google Sites?
In the WordPress block editor, add a Custom HTML block and paste the code. In Google Sites, choose Insert, then Embed, then Embed code. Other site builders usually have an HTML or embed block that works the same way.
Can I change the size?
Yes. Change the height value in the code, or keep the script line, which resizes the widget to fit automatically. The width fills its container up to 720 pixels.
Do I have to keep the credit link?
We'd appreciate it. The short line under the widget tells your readers where the tool comes from and helps keep it free.

Prefer paper? Print our metric conversion chart or kitchen conversion chart.