Free tandem slide calculator for your website

Drivers type the numbers from their scale ticket and see which way to slide the trailer tandems, how many holes, and what each axle group will weigh. Add it to a trucking school, fleet, dispatch or driver resource page with one snippet.

• Free. No sign-up, no ads, no cookies.
• Numbers stay on the driver's device.
• Works on phones and resizes itself to fit your page.
• Checks the 34,000 lb axle-group limit and, when switched on, the California 40 ft kingpin-to-rear-axle rule.

Embed code

Paste this into an HTML block on your page. Please keep the credit line under the calculator.

<iframe id="ac-tandem-calc" src="https://tools.altitudecraft.com/tandem-slide-calculator/" title="Tandem slide calculator" loading="lazy" allow="clipboard-write" style="display:block;width:100%;max-width:1080px;height:1400px;border:0;margin:0 auto"></iframe>
<p style="max-width:1080px;margin:6px auto 0;font-size:14px">Tandem slide calculator by <a href="https://www.altitudecraft.com/pages/tandem-slide-calculator?utm_source=embed&amp;utm_medium=referral&amp;utm_campaign=ac262&amp;utm_content=credit" rel="nofollow">AltitudeCraft</a></p>
<script>window.addEventListener('message',function(e){var d=e.data;if(e.origin!=='https://tools.altitudecraft.com'||!d||d.type!=='ac-tandem-calc-height'||typeof d.height!=='number')return;var f=document.getElementById('ac-tandem-calc');if(f)f.style.height=Math.max(300,Math.min(6000,Math.round(d.height)))+'px';});</script>

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Your site builder removes scripts? The calculator still works; it just keeps a fixed height. Questions or a custom version for your fleet: use the AltitudeCraft contact page.

How the numbers are worked out

The full calculator page explains the formula, gives a weight-per-hole chart and worked examples: Tandem Slide Calculator on AltitudeCraft.