Construction & Trade Calculators#
Need quick and accurate calculations for your construction projects? Our construction and trade calculators help contractors, builders, and DIY enthusiasts calculate concrete yardage, rafter lengths, and other essential measurements. Save time and reduce material waste with our professional-grade calculation tools.
Embed These Calculators#
Let crews and clients calculate right on your site. Embed the full page or a specific tool using the hash anchor. Adjust height to fit.
Full page embed:
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<div style="text-align:right;font:400 12px/1.4 system-ui;margin-top:4px">Calculator by <a href="https://strtly.com/calculators/construction-trade/" target="_blank" rel="noopener">Strtly</a></div>
Per-calculator embeds:
<!-- Concrete Yardage -->
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<!-- Rafter Length -->
<iframe src="https://strtly.com/calculators/construction-trade/?embed=1#rafter-length-calculator" width="100%" height="720" style="border:0;max-width:100%"></iframe>
<div style="text-align:right;font:400 12px/1.4 system-ui;margin-top:4px">Calculator by <a href="https://strtly.com/calculators/construction-trade/" target="_blank" rel="noopener">Strtly</a></div>
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<iframe src="https://strtly.com/calculators/construction-trade/?embed=1#stair-stringer-calculator" width="100%" height="740" style="border:0;max-width:100%"></iframe>
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<!-- Electrical Conduit Bending -->
<iframe src="https://strtly.com/calculators/construction-trade/?embed=1#electrical-conduit-bending-calculator" width="100%" height="760" style="border:0;max-width:100%"></iframe>
<div style="text-align:right;font:400 12px/1.4 system-ui;margin-top:4px">Calculator by <a href="https://strtly.com/calculators/construction-trade/" target="_blank" rel="noopener">Strtly</a></div>
Concrete Yardage Calculator#
Rafter Length Calculator#
Stair Stringer Calculator#
Calculate stair stringer layout, number of steps, and dimensions. Use for "stair stringer calculator", "how to layout stair stringers", and "stair rise and run calculator" searches.
Electrical Conduit Bending Calculator#
Calculate conduit bend marks and shrink for 90°, offset, and stub-up bends. Use for "electrical conduit bending calculator", "conduit offset calculator", and "conduit shrink calculator" searches.
Frequently Asked Questions#
How do I calculate concrete yardage for my project?
To calculate concrete yardage, multiply the length × width × depth (in feet) and divide by 27. Our calculator automatically converts inches to feet and provides the exact cubic yards needed, plus a recommended 10% extra for waste.
What's the difference between cubic feet and cubic yards of concrete?
Concrete is typically sold by the cubic yard. One cubic yard equals 27 cubic feet. This calculator converts your measurements to cubic yards automatically, which is the standard unit concrete suppliers use for pricing and delivery.
How accurate are these construction calculators?
Our calculators use industry-standard formulas and are accurate for typical construction projects. However, always consult with your contractor or supplier for complex projects, as factors like ground conditions, reinforcement, and local building codes may affect material requirements.
Do I need to add extra concrete for waste?
Yes, it's recommended to order 10-15% extra concrete to account for waste, spillage, and slight variations in measurements. Our calculator includes a 10% waste factor in the final recommendation.