Calculators for the checks that happen every day.

Start with a focused tool, keep the units visible, and carry the assumptions with the result. CivilKit is growing from simple structural and site calculations into a practical civil engineering reference.

STRUCTURAL14 tools

Beams, flexure, columns, sections & load take-offs

Support reactions, beam actions, elastic flexure, reinforced-concrete flexural capacity and required-steel sizing, ideal Euler buckling, circular, rectangular, T-section, L-section, and symmetric I-section properties, gross column stress screening, and transparent load take-offs.

Open structural tools

SITE / MATERIALS5 tools

Quantities, grades & setting out

Estimate concrete, reinforcement spacing and mass, earthwork quantities, and the grade geometry behind everyday site layout.

Open site tools

UTILITIES1 tool

Keep the units consistent

Convert common civil quantities before they enter a formula or spreadsheet.

Open unit converter

HYDRAULICS12 tools

Channels, pipes, critical depth, weirs, hydrostatics & stormwater

Estimate rectangular and trapezoidal channel flow, solve critical and normal depth, size full-pipe diameter, check full and partially full circular-pipe capacity, estimate Darcy-Weisbach and Hazen-Williams head loss, rectangular weir discharge, hydrostatic wall thrust, and preliminary catchment peak runoff.

Open hydraulics tools

FOUNDATIONS4 tools

Footing capacity and retaining-wall screens

Compare average footing pressure, estimate Terzaghi bearing capacity, calculate Rankine active earth thrust, and screen simple gravity-wall stability for an early foundation load case.

Open foundation tools