How it works
Each calculator below comes with a short piece of HTML. Paste it into any page that accepts custom HTML: a WordPress "Custom HTML" block, Squarespace or Wix code block, Webflow embed, or plain HTML. The calculator resizes itself to fit, works on phones, and has no ads or tracking inside it.
The only thing we ask is that you keep the small "by Backyard Numbers" line under it. Questions or a calculator you'd like us to build? Email hello@backyardnumbers.com.
Gravel calculator
Cubic yards, tons and bags of gravel or crushed stone. Preview ↗
<iframe src="https://backyardnumbers.com/embed/gravel-calculator/" title="Gravel calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/gravel-calculator/">gravel calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Mulch calculator
Cubic yards or bags of mulch for beds and borders. Preview ↗
<iframe src="https://backyardnumbers.com/embed/mulch-calculator/" title="Mulch calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/mulch-calculator/">mulch calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Topsoil calculator
Yards, tons and bags of topsoil for lawns and beds. Preview ↗
<iframe src="https://backyardnumbers.com/embed/topsoil-calculator/" title="Topsoil calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/topsoil-calculator/">topsoil calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Asphalt calculator
Tons of hot mix asphalt for a driveway, path or patch. Preview ↗
<iframe src="https://backyardnumbers.com/embed/asphalt-calculator/" title="Asphalt calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/asphalt-calculator/">asphalt calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Paver base calculator
Gravel base, bedding sand and paver count for a patio. Preview ↗
<iframe src="https://backyardnumbers.com/embed/paver-base-calculator/" title="Paver base calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/paver-base-calculator/">paver base calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Retaining wall calculator
Blocks, cap stones and gravel for a block wall. Preview ↗
<iframe src="https://backyardnumbers.com/embed/retaining-wall-calculator/" title="Retaining wall calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/retaining-wall-calculator/">retaining wall calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Sand calculator
Yards, tons and 50 lb bags of sand. Preview ↗
<iframe src="https://backyardnumbers.com/embed/sand-calculator/" title="Sand calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/sand-calculator/">sand calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Cubic yard calculator
Convert any area and depth into cubic yards. Preview ↗
<iframe src="https://backyardnumbers.com/embed/cubic-yard-calculator/" title="Cubic yard calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/cubic-yard-calculator/">cubic yard calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Raised bed soil calculator
Soil, compost and bags to fill raised garden beds. Preview ↗
<iframe src="https://backyardnumbers.com/embed/raised-bed-soil-calculator/" title="Raised bed soil calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/raised-bed-soil-calculator/">raised bed soil calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Fill dirt calculator
Yards, tons and truckloads of fill dirt. Preview ↗
<iframe src="https://backyardnumbers.com/embed/fill-dirt-calculator/" title="Fill dirt calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/fill-dirt-calculator/">fill dirt calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Compost calculator
Compost for beds and lawn top dressing. Preview ↗
<iframe src="https://backyardnumbers.com/embed/compost-calculator/" title="Compost calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/compost-calculator/">compost calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Sod calculator
Pallets, rolls and slabs of sod for a new lawn. Preview ↗
<iframe src="https://backyardnumbers.com/embed/sod-calculator/" title="Sod calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/sod-calculator/">sod calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Grass seed calculator
Pounds of grass seed for a new lawn or overseeding. Preview ↗
<iframe src="https://backyardnumbers.com/embed/grass-seed-calculator/" title="Grass seed calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/grass-seed-calculator/">grass seed calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Fence calculator
Posts, rails, pickets and concrete for a wood fence. Preview ↗
<iframe src="https://backyardnumbers.com/embed/fence-calculator/" title="Fence calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/fence-calculator/">fence calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Square footage calculator
Area of rectangles, circles and triangles in sq ft. Preview ↗
<iframe src="https://backyardnumbers.com/embed/square-footage-calculator/" title="Square footage calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/square-footage-calculator/">square footage calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Lawn fertilizer calculator
Pounds of fertilizer from your lawn size and N-P-K. Preview ↗
<iframe src="https://backyardnumbers.com/embed/lawn-fertilizer-calculator/" title="Lawn fertilizer calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/lawn-fertilizer-calculator/">lawn fertilizer calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Yards to tons calculator
Convert cubic yards to tons for any material. Preview ↗
<iframe src="https://backyardnumbers.com/embed/yards-to-tons-calculator/" title="Yards to tons calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/yards-to-tons-calculator/">yards to tons calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Flagstone calculator
Tons of flagstone and base for a patio or path. Preview ↗
<iframe src="https://backyardnumbers.com/embed/flagstone-calculator/" title="Flagstone calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/flagstone-calculator/">flagstone calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Pea gravel calculator
Yards, tons and bags of pea gravel for patios, paths and play areas. Preview ↗
<iframe src="https://backyardnumbers.com/embed/pea-gravel-calculator/" title="Pea gravel calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/pea-gravel-calculator/">pea gravel calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>River rock calculator
Tons and bags of river rock for beds, borders and dry creek beds. Preview ↗
<iframe src="https://backyardnumbers.com/embed/river-rock-calculator/" title="River rock calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/river-rock-calculator/">river rock calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>Fence post concrete calculator
Bags of concrete to set fence and deck posts. Preview ↗
<iframe src="https://backyardnumbers.com/embed/fence-post-concrete-calculator/" title="Fence post concrete calculator" loading="lazy" style="width:100%;max-width:760px;height:820px;border:0"></iframe>
<p style="font:14px/1.4 sans-serif;margin:6px 0 0">Free <a href="https://backyardnumbers.com/fence-post-concrete-calculator/">fence post concrete calculator</a> by Backyard Numbers</p>
<script>addEventListener("message",function(e){if(e.origin=="https://backyardnumbers.com"&&e.data&&e.data.bn)document.querySelectorAll('iframe[src$="'+e.data.bn+'"]').forEach(function(f){f.style.height=e.data.h+"px"})})</script>