Home / Free calculator widgets

Free calculator widgets for your website

Running a DIY blog, a home improvement shop, a landscaping company or a real estate site? Put any of our calculators on your own page so your readers get exact answers without leaving. It is free, it has no ads inside, and it works on phones.

How to add a calculator

Pick a calculator below and click Copy code.
Paste the code into your page. In WordPress, use a Custom HTML block. In Squarespace, Wix or Webflow, use an Embed or Code block.
Publish. The calculator adjusts its height automatically. If your site strips scripts, it still works at a fixed height.

The only thing we ask is that you keep the small credit line under the calculator. The math always runs in your reader's browser and nothing they type is sent anywhere. Want a calculator we do not have, or a different color? Tell us.

Square Footage Calculator

Area of rooms, floors and yards. Mix shapes, add waste and cost. See it live.

<iframe src="https://homemathcalc.com/embed/square-footage-calculator/" title="Square Footage Calculator" width="100%" height="880" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Square Footage Calculator by <a href="https://homemathcalc.com/square-footage-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Concrete Calculator

Cubic yards and 40, 60 or 80 lb bags for slabs, footings and posts. See it live.

<iframe src="https://homemathcalc.com/embed/concrete-calculator/" title="Concrete Calculator" width="100%" height="850" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Concrete Calculator by <a href="https://homemathcalc.com/concrete-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Roofing Calculator

Roof area, squares, shingle bundles and underlayment from pitch and size. See it live.

<iframe src="https://homemathcalc.com/embed/roofing-calculator/" title="Roofing Calculator" width="100%" height="790" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Roofing Calculator by <a href="https://homemathcalc.com/roofing-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Roof Pitch Calculator

Convert rise and run to pitch, degrees and slope, plus rafter length. See it live.

<iframe src="https://homemathcalc.com/embed/roof-pitch-calculator/" title="Roof Pitch Calculator" width="100%" height="810" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Roof Pitch Calculator by <a href="https://homemathcalc.com/roof-pitch-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Tile Calculator

Number of tiles and boxes for floors, walls and backsplashes. See it live.

<iframe src="https://homemathcalc.com/embed/tile-calculator/" title="Tile Calculator" width="100%" height="830" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Tile Calculator by <a href="https://homemathcalc.com/tile-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Fence Calculator

Posts, rails, pickets and concrete bags for a wood fence. See it live.

<iframe src="https://homemathcalc.com/embed/fence-calculator/" title="Fence Calculator" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Fence Calculator by <a href="https://homemathcalc.com/fence-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Drywall Calculator

Drywall sheets, screws, tape and joint compound for walls and ceilings. See it live.

<iframe src="https://homemathcalc.com/embed/drywall-calculator/" title="Drywall Calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Drywall Calculator by <a href="https://homemathcalc.com/drywall-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Paint Calculator

Gallons of paint for walls and ceilings, minus doors and windows. See it live.

<iframe src="https://homemathcalc.com/embed/paint-calculator/" title="Paint Calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Paint Calculator by <a href="https://homemathcalc.com/paint-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Deck Calculator

Decking boards, joists, screws and cost for a new deck. See it live.

<iframe src="https://homemathcalc.com/embed/deck-calculator/" title="Deck Calculator" width="100%" height="890" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Deck Calculator by <a href="https://homemathcalc.com/deck-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Wallpaper Calculator

Rolls of wallpaper for a room or accent wall, including pattern repeat. See it live.

<iframe src="https://homemathcalc.com/embed/wallpaper-calculator/" title="Wallpaper Calculator" width="100%" height="800" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Wallpaper Calculator by <a href="https://homemathcalc.com/wallpaper-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Concrete Block Calculator

Cinder blocks, courses and mortar bags for a block wall or foundation. See it live.

<iframe src="https://homemathcalc.com/embed/concrete-block-calculator/" title="Concrete Block Calculator" width="100%" height="790" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Concrete Block Calculator by <a href="https://homemathcalc.com/concrete-block-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Metal Roof Calculator

Metal roofing panels, panel length, screws, ridge cap and trim. See it live.

<iframe src="https://homemathcalc.com/embed/metal-roof-calculator/" title="Metal Roof Calculator" width="100%" height="900" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Metal Roof Calculator by <a href="https://homemathcalc.com/metal-roof-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Spray Foam Insulation Calculator

Board feet, R-value, DIY kits and cost for open or closed cell foam. See it live.

<iframe src="https://homemathcalc.com/embed/spray-foam-insulation-calculator/" title="Spray Foam Insulation Calculator" width="100%" height="750" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Spray Foam Insulation Calculator by <a href="https://homemathcalc.com/spray-foam-insulation-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Carpet Calculator

Carpet in square feet and yards, roll length to order, pad and cost. See it live.

<iframe src="https://homemathcalc.com/embed/carpet-calculator/" title="Carpet Calculator" width="100%" height="780" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Carpet Calculator by <a href="https://homemathcalc.com/carpet-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Roof Replacement Cost Calculator

Estimate the cost of a new roof: asphalt, metal, tile or slate. See it live.

<iframe src="https://homemathcalc.com/embed/roof-replacement-cost-calculator/" title="Roof Replacement Cost Calculator" width="100%" height="780" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Roof Replacement Cost Calculator by <a href="https://homemathcalc.com/roof-replacement-cost-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Window Replacement Cost Calculator

Estimate new window prices by type, frame, install method and count. See it live.

<iframe src="https://homemathcalc.com/embed/window-replacement-cost-calculator/" title="Window Replacement Cost Calculator" width="100%" height="780" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Window Replacement Cost Calculator by <a href="https://homemathcalc.com/window-replacement-cost-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Bathroom Remodel Cost Calculator

Estimate a bathroom renovation by size, finish level and extras. See it live.

<iframe src="https://homemathcalc.com/embed/bathroom-remodel-cost-calculator/" title="Bathroom Remodel Cost Calculator" width="100%" height="760" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Bathroom Remodel Cost Calculator by <a href="https://homemathcalc.com/bathroom-remodel-cost-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Gravel Calculator

Cubic yards and tons of gravel, crushed stone, sand or rock. See it live.

<iframe src="https://homemathcalc.com/embed/gravel-calculator/" title="Gravel Calculator" width="100%" height="850" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Gravel Calculator by <a href="https://homemathcalc.com/gravel-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Mulch Calculator

Bags or cubic yards of mulch for beds, borders and tree rings. See it live.

<iframe src="https://homemathcalc.com/embed/mulch-calculator/" title="Mulch Calculator" width="100%" height="740" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Mulch Calculator by <a href="https://homemathcalc.com/mulch-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Topsoil Calculator

Cubic yards, tons or bags of topsoil for lawns, beds and raised beds. See it live.

<iframe src="https://homemathcalc.com/embed/topsoil-calculator/" title="Topsoil Calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Topsoil Calculator by <a href="https://homemathcalc.com/topsoil-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Paver Calculator

Pavers, base gravel, bedding sand and edging for a patio or walkway. See it live.

<iframe src="https://homemathcalc.com/embed/paver-calculator/" title="Paver Calculator" width="100%" height="950" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Paver Calculator by <a href="https://homemathcalc.com/paver-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Retaining Wall Calculator

Wall blocks, cap blocks, base gravel and drainage stone for a garden wall. See it live.

<iframe src="https://homemathcalc.com/embed/retaining-wall-calculator/" title="Retaining Wall Calculator" width="100%" height="810" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Retaining Wall Calculator by <a href="https://homemathcalc.com/retaining-wall-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Budget Calculator

Monthly household budget with a 50/30/20 needs, wants and savings check. See it live.

<iframe src="https://homemathcalc.com/embed/budget-calculator/" title="Budget Calculator" width="100%" height="1130" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Budget Calculator by <a href="https://homemathcalc.com/budget-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Closing Cost Calculator

Estimate buyer closing costs and the total cash you need to close. See it live.

<iframe src="https://homemathcalc.com/embed/closing-cost-calculator/" title="Closing Cost Calculator" width="100%" height="950" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Closing Cost Calculator by <a href="https://homemathcalc.com/closing-cost-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

HELOC Calculator

How much you can borrow against your home, and your HELOC payments. See it live.

<iframe src="https://homemathcalc.com/embed/heloc-calculator/" title="HELOC Calculator" width="100%" height="730" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">HELOC Calculator by <a href="https://homemathcalc.com/heloc-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Refinance Calculator

Should you refinance? New payment, monthly savings and break-even month. See it live.

<iframe src="https://homemathcalc.com/embed/refinance-calculator/" title="Refinance Calculator" width="100%" height="760" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Refinance Calculator by <a href="https://homemathcalc.com/refinance-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Property Tax Calculator

Annual and monthly property tax from home value, rate and exemptions. See it live.

<iframe src="https://homemathcalc.com/embed/property-tax-calculator/" title="Property Tax Calculator" width="100%" height="740" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Property Tax Calculator by <a href="https://homemathcalc.com/property-tax-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Solar Panel Calculator

How many solar panels you need, system cost, savings and payback years. See it live.

<iframe src="https://homemathcalc.com/embed/solar-panel-calculator/" title="Solar Panel Calculator" width="100%" height="910" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Solar Panel Calculator by <a href="https://homemathcalc.com/solar-panel-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>

Electricity Cost Calculator

What any appliance costs to run per hour, day, month and year. See it live.

<iframe src="https://homemathcalc.com/embed/electricity-cost-calculator/" title="Electricity Cost Calculator" width="100%" height="790" loading="lazy" style="border:0;max-width:720px;width:100%"></iframe>
<p style="font-size:13px">Electricity Cost Calculator by <a href="https://homemathcalc.com/electricity-cost-calculator/">HomeMathCalc</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://homemathcalc.com"||!e.data||!e.data.hmcH)return;var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source)f[i].style.height=e.data.hmcH+"px"})</script>