Architecture Calculators & Space Planners

Comprehensive architecture and civil engineering calculation suite. Estimate floor area ratios (FAR/FSI), setback distances, plot coverage, staircase dimensions, civil quantities, and structural material budgets.

Staircase Calculator

Universal Staircase & Structural Studio. Calculate exact risers, treads, total run, pitch slope, headroom clearance, NBC 2016 / IRC compliance, carpenter cut-lists, and RCC/timber material BOQ.

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Frequently Asked Questions

What is Floor Space Index (FSI) & Floor Area Ratio (FAR)?
FSI (used in South/West India) and FAR (used in North India) represent the ratio of the total built-up area of a building to the total plot area. Formula: FSI = Total Built-up Area / Plot Area. Permissible FSI depends on local municipal regulations and access road width.
How are building setbacks calculated under NBC India & Unified DCR?
Building setbacks specify the mandatory open spaces required at the front, rear, and sides of a plot. Under NBC 2016 and state DCR guidelines, front setbacks are determined primarily by the abutting road width, while side and rear setbacks increase with the proposed building height.
How do I calculate concrete, cement, sand, and steel quantities for construction?
Concrete mix quantities are derived using nominal volume ratios (e.g. M20 1:1.5:3). Multiply the wet concrete volume by 1.54 to convert to dry volume, then divide by the sum of parts to determine cement bags, sand cubic feet/meters, and aggregate requirements.