Free Civil Engineering Tools & Calculators

Use free online civil engineering calculators and browser tools for surveying, scientific math, matrices, graphing, structural analysis, reinforced-concrete detailing, PERT/CPM scheduling, PDF and OCR workflows, QR codes, and e-signatures.

E-Signature Maker

Create, crop, clean, and export handwritten signatures locally with transparent-background processing and touch or stylus drawing.

Intelligent OCR Scanner

Local neural OCR for PDFs and document images with scan enhancement, confidence review, and engineering-aware reconstruction.

Natural Display Scientific Calculator

Full-screen fx-991ES-style workspace with natural input and output, equations, complex numbers, statistics, Base-N, matrices, tables, vectors, memory, and typed calculator errors.

Surveyor's Toolkit

Interactive parcel-map workspace with synchronized coordinates/bearings/azimuths, direct point editing, multi-lot overlays, image alignment, measurement, subdivision, save/load, and PDF reporting.

PDF Studio

Local-first PDF workspace to sort, rotate, merge, split, resize, compress, convert images, add watermarks and page numbers, and prepare A3/A4 documents.

Project Management Tool

Advanced PERT/CPM scheduling, S-Curve cost tracking, resource allocation histograms, and Monte Carlo completion risk simulations.

DiagramPro – Structural Diagram Maker

Full-featured tool for creating beams, frames, and trusses. Includes statics solver with SFD, BMD, deformed shape, and reaction diagrams.

RC Diagram Maker 3D

Interactive 3D detailing tool for reinforced concrete sections. Visualize beams, columns, and footings with accurate rebar placement and hooks.

Matrix Solver

Step-by-step matrix operations and linear equation solver. Supports up to 10x10 matrices with exact fractional arithmetic.

Any Graph

Interactive plotting engine to graph Cartesian, parametric, polar equations, and tabulate coordinates with curve-fitting.

Schedule Maker

Standalone local calendar for creating and managing personal schedules with Day, Week, and Month views, recurrence, conflict indicators, search, and calendar import/export.

Scratchpad

Create a blank engineering scratchpad for quick calculations, sketches, diagrams, and solution development. Saved drawings are managed on a separate page.

QR Code Generator

Privacy-first QR workspace for links, Wi-Fi, contacts, messages, events, locations, branded styling, scan-safety checks, and high-resolution exports.