Five tools that do the first pass for you.
Everything runs in your browser. Nothing is uploaded, nothing is stored, and it keeps working once the page has loaded. Built for a quick estimate, not to replace a signed design.
Allowable bearing capacity estimator
Terzaghi general shear on a shallow footing, with a factor of safety applied.
- Ultimate capacity qu 0 kPa
- Net allowable 0 kPa
- Bearing factors Nc, Nq, Nγ
- Safe load on footing 0 kN
Terzaghi general shear failure, groundwater assumed below the influence zone. Settlement is not checked here and very often governs instead. Use this to sanity check an order of magnitude, then have the ground tested.
Borehole layout planner
How many holes, how deep, and roughly how long the fieldwork will take.
- Minimum depth 0 m
- Total drilling 0 m
- Indicative fieldwork 0 days
- Report available 0 weeks
A planning estimate following common practice of one borehole per 300 to 500 square metres with a minimum of three, and depth of 1.5 to 2 times foundation width below founding level. Your engineer or approving authority may require more.
USCS soil classifier
Enter grading and Atterberg limits, get the Unified Soil Classification group symbol.
- Group name Lean clay
- Plasticity index 22
- Position on chart Above A line
- Swell potential Moderate
Follows ASTM D2487. Cu and Cc are only used when the soil is coarse grained with under 5 percent fines. Dual symbols for borderline soils are simplified here.
Concrete mix quantities
Nominal mix proportions turned into materials for the volume you are pouring.
- Cement 0 kg
- Fine aggregate, sand 0 m³
- Coarse aggregate 0 m³
- Water at w/c ratio 0 litres
Uses a dry to wet volume factor of 1.54 and cement density of 1440 kg per cubic metre. Nominal mixes are a starting point. Anything structural should be a designed mix verified by trial cubes.
Pressure and stress converter
The units geotechnical reports mix up, converted in both directions.
Kilopascal and kilonewton per square metre are numerically identical. Older Pakistani reports frequently quote bearing capacity in tonne force per square metre, where 1 t/m² is about 9.81 kPa.
These are estimates, not a design.
Every tool here uses simplified correlations and assumed conditions. They are genuinely useful for checking whether a number is in the right region, sizing a budget, or catching an error in someone else's figure. They cannot tell you what is under your site, because only a borehole can do that.
