Construction & Engineering Calculators
Quick-reference calculators for contractors, architects, and civil engineers in India. Every formula cites the relevant standard (IS 456, NBC India 2016, ECBC 2017, NEC). All calculations run in your browser — no signup, no data stored.
For estimation and reference only. These calculators are not a substitute for professional structural engineering, licensed electrical design, or site-specific survey. Always verify critical dimensions and loads with a qualified civil or structural engineer before construction.
🏗️Structural
Concrete Mix Calculator
Calculate cement bags, sand, and aggregate volumes for nominal concrete mixes per IS 456:2000
IS 456:2000 — Plain and Reinforced Concrete Code of Practice (Table 9 Nominal Mixes)
Rebar Spacing / Quantity Calculator
Calculate total number of bars, total length, and steel weight for a slab per IS 456:2000 bar weight standards
IS 456:2000 — Annex B & IS 1786:2008 (HYSD bar weights)
Beam Load Calculator
Estimate safe uniformly distributed load (UDL) capacity of an RCC beam using simplified IS 456:2000 approach
IS 456:2000 — Clause 22 (Effective Span) & Clause 23 (Slenderness Limits)
📐Civil
Stair Rise / Run Calculator
Calculate number of steps, rise, and run per step and check compliance with NBC India staircase norms
NBC India 2016 — Part 3, Clause 8 (Stairways): Max rise 190 mm, Min going (tread) 250 mm
Insulation R-Value Calculator
Find the minimum R-value for walls and roofs as per ECBC 2017 (Energy Conservation Building Code, India) by climate zone
ECBC 2017 — Bureau of Energy Efficiency (BEE), Table 4.2 (Opaque Envelope Requirements)
🚰Plumbing
⚡Electrical
🎨Finishing
Paint Coverage Calculator
Calculate litres of paint needed and estimated cost for walls, factoring in coats and paint type
Asian Paints / Berger standard coverage rates; IS 428 (Distemper) / IS 133 (Emulsion)
Tile Quantity Calculator
Calculate number of tiles and boxes needed for a floor or wall area, including configurable wastage
IS 13630:2006 (Ceramic Tiles — Sampling); Standard packing: 20 tiles per box (600×600 mm)
❄️HVAC
Built for the Indian Construction Industry
All structural calculators reference IS 456:2000 (Plain and Reinforced Concrete) and NBC India 2016. Insulation calculations use ECBC 2017 climate zone data. Pipe sizing follows NBC India Part 9. Wire gauge uses NEC ampacity tables with IS 694 equivalents. This ensures calculations are directly applicable to Indian project documentation.
Formulas based on IS 456:2000, NBC India 2016, ECBC 2017, ASHRAE, and NEC. All results are estimates — verify with a licensed professional before construction. Last reviewed April 2026.