QuickstartMake your first call.Sign in with your email to get started.Calculate a takeoffCalculate rectangular slabs, walls and surfaces, pipe lengths and fitting counts. Convert mixed length units before calculating. Deduct wall or surface openings. Keep area, volume, length and counts separate. No waste or costs are added. One calculation counts as one takeoff. Returns ok: false with validation errors for invalid or missing dimensions. Optionally save the result to your account.