One-Way Concrete Slab Calculator to ACI 318-19

Design one-way concrete slabs to ACI 318-19 in minutes. Check shear, moment, deflection & steel. Visual results, live solving, and instant PDF export.

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Overview

About the Calculator

Designing reinforced concrete slabs for strength, serviceability, and code compliance has never been easier. The ClearCalcs One-Way Concrete Slab Calculator to ACI 318-19 delivers a powerful yet easy-to-use tool for engineers looking to automate repetitive calculations and focus on design decisions. Whether you’re checking flexural capacity, minimum steel requirements, or verifying deflection limits, our calculator does the heavy lifting with real-time solving, graphing, and transparent ACI 318-19 clause references throughout.

Live ACI 318-19 compliance checks

Automatically check your slab design against ACI 318-19 provisions for flexure, shear, deflection, and reinforcement spacing. Each result links directly to the relevant clause for fast verification and documentation.

Real-time moment, shear, and deflection graphs

Visualize performance under load combinations with interactive moment, shear, and deflection diagrams. Clearly identify governing load cases and failure conditions to optimize your design.

Flexible multi-span support

Model continuous slabs with multiple spans, interior supports, and cantilevers using pinned, fixed, or roller conditions, ideal for residential floors, parking decks, and flat plate systems.

Integrated load combinations and serviceability limits

Default load combinations for strength and service-level deflection limits (L/240, L/360, etc.) are built-in and fully editable. Account for dead, live, snow, wind, and earthquake loads with precision.

Accurate reinforcement design and spacing control

Input your bar size and spacing preferences, and ClearCalcs calculates reinforcement areas, spacing checks, effective depth, and concrete cover compliance—automatically checking A_s,min and spacing rules from ACI 318-19.

Easy export and documentation

Generate clean, professional PDF reports for submittals or internal review, with full workings and code references shown. Great for QA, plan checkers, and collaborative team workflows.

Presets

Ready-Made Configuration to Save You Time

A preset is a ready-made configuration that instantly sets up a structural calculation with commonly used parameters, materials, and load scenarios. Each preset is tailored to specific use cases like floor joists, roof girders, or deck beams.

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Why ClearCalcs?

Frustration to Flow

See how ClearCalcs transforms structural calculations from a tedious, error-prone chore into an efficient, stress-free process.

With spreadsheets and clunky software

Frustration, fuss, and fragile formulas—the old way of engineering calculations that holds you back

Struggle with endless spreadsheets and custom formulas.

Building codes change, but outdated software and spreadsheets don’t.

Triple-check and verify manual input at every turn.

Old software feels like a maze, with unclear settings, limited templates, and rigid interfaces.

With ClearCalcs

Effortless, efficient engineering calculations at your fingertips.

100+ pre-built calculators for different materials.

Every calculation comply with the latest codes and standards.

Forget the worry of “black box” calculations; verify calculators with inline formulas, codes, and checks.

Intuitive tools built to your workflow, plus unmatched customer support.

How It Works

Your code-compliant calculator

Tired of complex calculations? ClearCalcs Calculator Library keeps it simple, secure and code-compliant – so you can calculate with confidence.

Save time with ready-to-use templates for wood, steel, and concrete

ClearCalcs offers an extensive library of easy-to-use calculators for beams, columns, and footings, designed to make structural calculations simpler and faster.

Choose from a wide range of pre-configured beam and column options, complete with automatic member sizing, so you can quickly reach reliable designs and reduce rework.

Beams

Columns

Foundations

Walls

Loads

Dynamically track your load paths from roof to foundation

No need to copy and paste reactions between calculations! If the top calculator's reactions change, the loads being inherited onto the lower calculator will update automatically. This includes all loads such as dead, live, snow, seismic, and wind.

Submit professional reports for permit review

ClearCalcs is not only easy to use, but also easy to check! All calculations follow an easy to understand traffic light check system, with multiple levels of detail available giving you the choice of printing every step of the calculation and all code and standard references, or simply a compact, one-page print out.

Report heading includes your project name and address

Easily upload your organization logo for a professional report

Use custom PDF upload to merge additional documents to your structural calculations

Download a sample report

Ready to ditch the spreadsheets?
So are we.

Experience the full power of ClearCalcs with a 14 day free trial and start being more productive.

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