Construction calculators built for the field, not the classroom

Quick, accurate numbers for the calculations that come up on every project — concrete volume, change order margin, retainage, and more. No sign-up, no spreadsheet, no guesswork.

 

Calculators

Pick a calculator below. Each one runs right in your browser and works on your phone in the field or your desktop in the office.

Concrete Calculator

Estimate volume, ready-mix cost, and bag count for slabs, footings, columns, and stairs. Link text: Calculate concrete

Change Order Cost Impact Calculator

See how a change order shifts your blended project margin before you submit it for approval.

Retainage Calculator

Work out retainage withheld and net payment due on your current pay application.

Markup & Margin Calculator

Convert between markup and margin so you know exactly what you're pricing a job at.

RFI Delay Cost Calculator

See what slow RFI turnaround is actually costing your projects in idle crew time and schedule slip.

Like doing the math by hand? Buildend does it automatically.

These calculators solve the one-off numbers. Buildend tracks the real thing — budgets, commitments, change orders, and retainage — automatically, on every project, in real time.