Space Between Worlds
Every number a builder needs.
21 engineering calculators. Metric or imperial. Instant, exact, and beautiful.
Live results
Every field recalculates as you type. No submit button, no waiting.
Metric ↔ Imperial
Flip units anywhere and every input and output converts with you.
Built for site
Waste, bags, trucks and pallets. Numbers you can actually order.
Start with the essentials.
The six calculators engineers open first.
Beam Analysis
Moment, shear and deflection in seconds.
Concrete Volume
Slabs, footings, columns, walls and stairs.
Rebar
Bar counts, weights and lap lengths for slabs and beams.
Spread Footing
Size a pad footing from column load and soil bearing.
Roofing
Pitch, rafter length, roof area and materials.
Excavation & Earthwork
Bank, loose and compacted volumes with haulage.
Structural
Beams, columns, footings and loads. The numbers that hold everything up.
See all structuralBeam Analysis
Moment, shear and deflection in seconds.
Column Buckling
Euler critical load and slenderness check.
Section Properties
Area, inertia and section modulus for common shapes.
Load Takedown
Area loads to line loads and factored combinations.
Spread Footing
Size a pad footing from column load and soil bearing.
Retaining Wall
Rankine earth pressure and stability ratios.
Timber Joist
Span check for floor joists by bending, shear and deflection.
Concrete & Masonry
Pours, bars, bricks and mortar. Order exactly what the site needs.
See all concrete & masonryMeasure twice. Calculate once.
Save results, share a link with the site team, or print a clean summary for the file.
Browse all 21 calculators