Available tools
Free Engineering Calculators & Planning Tools
Free online engineering calculators and planning workspaces for section weight, bolt torque, bolt pretension, tolerance stackup, steel section sizes, land area, Indian land units, and weekly planning. Clear assumptions, report-ready outputs, no install.
How EnggTools calculators are prepared
Each public tool is built around a practical workflow rather than a bare formula box. The bolt torque calculator, section weight calculator, tolerance stackup calculator, steel section finder, land area calculator, Indian land converter, and weekly planner keep inputs, assumptions, units, warnings, and outputs visible so the result can be reviewed before it is copied into a calculation note or used for a design discussion.
The calculators are intended for early sizing, checking, comparison, and documentation support. They do not replace official standards, current project specifications, supplier data, or competent engineering review, but they make the routine checking process faster and easier to audit.
ASME B31.3 Pipe and Tubing Calculator
Calculate thin-wall pipe thickness, hoop stress, finished bend wall and available bend thinning with B36.10/B36.19 dimensions and B31.3 references.
Code-referenced calculator ready
Land Area Calculator
Calculate irregular plot area from side lengths and the required diagonals for triangle-based land measurement.
Calculator ready
Indian Land Area Converter
Convert Gaj, Acre, Hectare, Cent, Guntha, Kanal, Marla, Bigha, Katha, Dhur, and other Indian land units.
Converter ready
Steel Section Sizes
Browse structural steel section size tables for I beams, H beams, channels, angles, bars, hollow sections, plates, sheet piles, and purlins.
Section tables ready
Section Weight Calculator
Calculate material weight per metre, foot, or inch from predefined sections, custom drawn profiles, or uploaded DXF geometry.
Drawing and DXF calculator ready
Tolerance Stackup Calculator
Calculate tolerance stackup, worst-case limits, RSS variation, fit risk, and assembly limits with clear assumptions and saved projects.
Calculator ready
Weekly Planner
Plan engineering work, review priorities, and keep schedules connected to your EnggTools account.
Planner ready
Bolt Torque Calculator
Calculate bolt torque, pretension, preload scatter, retained clamp, pressure-opening checks, and structural slip checks.
Calculator ready
Clear assumptions
Every serious calculator should show what it assumes about units, formulas, coefficients, and limits so users can challenge the result.
Practical outputs
The focus is report-ready values, warnings, and checks that engineers can use in review meetings, markups, and calculation packages.
Growing library
New tools are added only when they can provide a complete workflow, not just a placeholder page or a copied table.