Four free calculators built on the Ontario Building Code — no sign-up needed to use them. Create a free account to save your calculations and return to them anytime.
Determine applicable OBC Part and major occupancy.
Open Calculator →Calculate occupant load based on applicable OBC requirements and Table 3.1.17.1.
Open Calculator →Determine the required plumbing fixtures for your occupancy and occupant load.
Open Calculator →Calculate spatial separation and exposing building face requirements.
Open Calculator →Select the applicable 3.2.2 article and determine permitted construction type and fire-resistance ratings.
Open Calculator →Determine whether your building is a high building, with every condition of Article 3.2.6.1 checked.
Open Calculator →Determine whether a standpipe system is required based on building height and area.
Open Calculator →Determine whether a fire alarm system is required and what type applies.
Open Calculator →Determine whether Section 3.8 barrier-free requirements apply to your project.
Open Calculator →Upgrade to Pro for access to many more calculators — all connected, so your project information flows between them. Fill in your OBC matrix faster, with more accuracy and less re-entry.