Free Calculator Widgets
Add any of these 25 calculators to your website with one line of HTML. Free for any site, no signup.
Every widget below is the same calculator that runs on The Tools Kit, inside an iframe sized for a blog post or a sidebar. It fills the width of your column, works on phones and shows no ads. Each one is listed with a preview and its embed code.
How to embed a calculator
- Open Show embed code under the calculator you want and press Copy embed code.
- Paste the code into an HTML block on your page: Custom HTML in WordPress, Embed code in Wix, or a Code block in Squarespace.
- Publish. Keep the “Calculator by The Tools Kit” line under the widget; it is the only condition of use.
Every widget except the moving cost calculator works out its answer in your visitor’s browser. The moving cost widget looks up city names through our server to suggest places as the visitor types.
Loans and mortgages
Mortgage Calculator
Estimate your monthly mortgage payment and total interest.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/mortgage-calculator" width="100%" height="640" style="border:1px solid #ddd;border-radius:12px;" title="Mortgage Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/mortgage-calculator">The Tools Kit</a></p>
Personal Loan Calculator
Calculate monthly payment and total cost of a personal loan.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/loan-calculator" width="100%" height="640" style="border:1px solid #ddd;border-radius:12px;" title="Personal Loan Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/loan-calculator">The Tools Kit</a></p>
Auto Loan Calculator
Calculate your monthly car payment including tax and trade-in.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/auto-loan-calculator" width="100%" height="720" style="border:1px solid #ddd;border-radius:12px;" title="Auto Loan Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/auto-loan-calculator">The Tools Kit</a></p>
Credit Card Payoff Calculator
See how long it will take to pay off a credit card balance.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/credit-card-payoff-calculator" width="100%" height="660" style="border:1px solid #ddd;border-radius:12px;" title="Credit Card Payoff Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/credit-card-payoff-calculator">The Tools Kit</a></p>
UK Student Loan Calculator
Calculate your monthly student loan repayment for Plan 1, 2, 4, 5, or a Postgraduate Loan.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/uk-student-loan-calculator" width="100%" height="560" style="border:1px solid #ddd;border-radius:12px;" title="UK Student Loan Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/uk-student-loan-calculator">The Tools Kit</a></p>
Pay, salary and tax
Paycheck Calculator
Estimate take-home pay after federal, FICA, and state tax.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/paycheck-calculator" width="100%" height="720" style="border:1px solid #ddd;border-radius:12px;" title="Paycheck Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/paycheck-calculator">The Tools Kit</a></p>
Hourly to Salary Calculator
Convert hourly wage to annual salary and back.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/hourly-to-salary-calculator" width="100%" height="560" style="border:1px solid #ddd;border-radius:12px;" title="Hourly to Salary Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/hourly-to-salary-calculator">The Tools Kit</a></p>
Salary to Hourly Calculator
Convert an annual salary into an hourly, weekly, or monthly rate.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/salary-to-hourly-calculator" width="100%" height="560" style="border:1px solid #ddd;border-radius:12px;" title="Salary to Hourly Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/salary-to-hourly-calculator">The Tools Kit</a></p>
Time Card Calculator
Calculate hours, overtime, and gross pay from daily punches.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/time-card-calculator" width="100%" height="900" style="border:1px solid #ddd;border-radius:12px;" title="Time Card Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/time-card-calculator">The Tools Kit</a></p>
Overtime Calculator
Calculate regular and overtime pay from hourly rate and hours worked.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/overtime-calculator" width="100%" height="640" style="border:1px solid #ddd;border-radius:12px;" title="Overtime Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/overtime-calculator">The Tools Kit</a></p>
Sales Tax Calculator
Add sales tax to a price or reverse-calculate pre-tax amount.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/sales-tax-calculator" width="100%" height="620" style="border:1px solid #ddd;border-radius:12px;" title="Sales Tax Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/sales-tax-calculator">The Tools Kit</a></p>
VAT Calculator
Add UK VAT to a price or extract VAT from a gross amount, at 20%, 5%, or 0%.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/vat-calculator" width="100%" height="600" style="border:1px solid #ddd;border-radius:12px;" title="VAT Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/vat-calculator">The Tools Kit</a></p>
GST/HST Calculator
Add Canadian GST/HST to a price or reverse-calculate the pre-tax amount, by province.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/gst-hst-calculator" width="100%" height="620" style="border:1px solid #ddd;border-radius:12px;" title="GST/HST Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/gst-hst-calculator">The Tools Kit</a></p>
Salary Tax Calculator Pakistan
Calculate FBR income tax and monthly take-home salary for FY 2026-27 or 2025-26.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/salary-tax-calculator-pakistan" width="100%" height="640" style="border:1px solid #ddd;border-radius:12px;" title="Salary Tax Calculator Pakistan" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/salary-tax-calculator-pakistan">The Tools Kit</a></p>
Saving and investing
Compound Interest Calculator
Project savings or investment growth with compound interest.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/compound-interest-calculator" width="100%" height="720" style="border:1px solid #ddd;border-radius:12px;" title="Compound Interest Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/compound-interest-calculator">The Tools Kit</a></p>
SIP Calculator
Project SIP maturity value with an optional annual step-up, total invested, and gains.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/sip-calculator" width="100%" height="660" style="border:1px solid #ddd;border-radius:12px;" title="SIP Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/sip-calculator">The Tools Kit</a></p>
Inflation Calculator
See what money from any year is worth today, based on the U.S. CPI-U index.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/inflation-calculator" width="100%" height="620" style="border:1px solid #ddd;border-radius:12px;" title="Inflation Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/inflation-calculator">The Tools Kit</a></p>
Net Worth Calculator
Calculate your net worth from your assets and liabilities.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/net-worth-calculator" width="100%" height="780" style="border:1px solid #ddd;border-radius:12px;" title="Net Worth Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/net-worth-calculator">The Tools Kit</a></p>
Everyday, school and moving
Tip Calculator
Calculate tip amount and split the bill between people.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/tip-calculator" width="100%" height="520" style="border:1px solid #ddd;border-radius:12px;" title="Tip Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/tip-calculator">The Tools Kit</a></p>
Discount Calculator
Calculate sale price and savings after a percentage discount.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/discount-calculator" width="100%" height="560" style="border:1px solid #ddd;border-radius:12px;" title="Discount Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/discount-calculator">The Tools Kit</a></p>
Percentage Calculator
Calculate percentages, percentage of a number, and percent change.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/percentage-calculator" width="100%" height="620" style="border:1px solid #ddd;border-radius:12px;" title="Percentage Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/percentage-calculator">The Tools Kit</a></p>
Age Calculator
Calculate exact age or time between two dates.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/age-calculator" width="100%" height="500" style="border:1px solid #ddd;border-radius:12px;" title="Age Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/age-calculator">The Tools Kit</a></p>
BMI Calculator
Calculate Body Mass Index from height and weight.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/bmi-calculator" width="100%" height="500" style="border:1px solid #ddd;border-radius:12px;" title="BMI Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/bmi-calculator">The Tools Kit</a></p>
GPA Calculator
Calculate your semester or cumulative GPA on the standard 4.0 scale from grades and credits.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/gpa-calculator" width="100%" height="680" style="border:1px solid #ddd;border-radius:12px;" title="GPA Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/gpa-calculator">The Tools Kit</a></p>
Moving Cost Calculator
Estimate moving costs by city distance and home size. Compare movers, containers, and truck rentals.
Show embed code
<iframe src="https://www.thetoolskit.co/embed/moving-cost-calculator" width="100%" height="760" style="border:1px solid #ddd;border-radius:12px;" title="Moving Cost Calculator" loading="lazy"></iframe> <p style="font-size:13px">Calculator by <a href="https://www.thetoolskit.co/moving-cost-calculator">The Tools Kit</a></p>
Questions about the widgets
Are the calculator widgets really free?
Yes. Any website can embed them at no cost, including commercial sites. There is no signup, no account and no usage limit. The only condition is that the "Calculator by The Tools Kit" line under the widget stays in place.
How do I add a calculator to WordPress, Wix or Squarespace?
Copy the embed code and paste it into a block that accepts HTML: the Custom HTML block in WordPress, the Embed code element in Wix, or the Code block in Squarespace. Publish the page and the calculator appears where you placed the block.
Can I change the size of the widget?
The width is 100%, so the widget fills the column it sits in and works on phones. You can change the height value in the code if your layout needs it; the default height fits each calculator without an inner scrollbar.
Do I need to update the widget when tax rates change?
No. The widget loads from our site, so when we update a calculator for a new tax year or a corrected rate, the change reaches your page automatically.
How each calculator works out its numbers is explained on our calculator methodology page. Something wrong or a calculator you would like as a widget? Tell us.