Set out right angles and get diagonal lengths fast. The Pythagoras calculator in TradeSet works offline so you’re covered in basements and tight sites.
This calculator is one tool inside the TradeSet app Toolbox: 18 calculators, jobs, history, and PDF export in one place.
Last updated: 18 February 2026
Metric units (mm/m) are used throughout, with Australian standards context where applicable.
Fast on-page input check using metric units for planning only.
Adjusted planning quantity is 111 units (base 100 with 10% allowance).
General guidance only. Verify with plans/engineer/local requirements.
This page is one calculator from the TradeSet Toolbox. Use the app to keep calculator history, attach results to jobs, and export clean PDFs from one place.
Open another tool now so your workflow stays in the same TradeSet calculator cluster.
Check Square Calculator
Check and set 90° with diagonal measurements. For setting out and squaring.
Open toolStairs Calculator
Rise, run, stringer length and angle for compliant stairs. Built for carpenters and builders.
Open toolRoof Pitch & Rafter Calculator
Free roof pitch and rafter length calculator for Australia. Degrees, ratio, rafter length—works offline.
Open toolPythagoras Calculator is built for Australian tradies who need fast, practical answers while planning work, ordering materials, or checking quantities on site.
It supports metric workflows (mm/m) and helps you move from raw measurements to usable outputs without spreadsheet delay. Use this page as an answer resource first, then as a tool.
Diagonal should be 6.0 m. If your measured diagonal is off, adjust your layout before fixing framing.
Pythagoras Calculator gives fast planning outputs for measuring, ordering, and quoting tasks on Australian jobs in metric units.
No. Use outputs as general guidance only, then verify decisions against approved plans, engineering advice, and local requirements.
Yes. TradeSet is designed for on-site workflows where reception can be unreliable, with calculators and saved context available quickly.
Use these links to move from guide to calculator, then continue in the TradeSet app workflow.
Check Square Calculator
Check and set 90° with diagonal measurements. For setting out and squaring.
Open calculatorStairs Calculator
Rise, run, stringer length and angle for compliant stairs. Built for carpenters and builders.
Open calculatorRoof Pitch & Rafter Calculator
Free roof pitch and rafter length calculator for Australia. Degrees, ratio, rafter length—works offline.
Open calculatorStair Stringer Calculations Explained for Australian Builders and Carpenters
A practical staircase set-out guide covering rise, run, stringer length, and how to avoid common recut errors on Australian sites.
Read guideRafter Length and Roof Pitch Explained: Practical Australian Set-Out Guide
A practical roof framing guide for converting rise/run into pitch and rafter length while avoiding common set-out and ordering errors.
Read guideOutputs use metric units and are intended as general guidance for Australian site planning. Check NCC/AS and project-specific requirements for your situation.
General guidance only. Verify with plans/engineer/local requirements.