BTTOTEK Solutions
Construction, Engineering & Property Calculators
Explore practical online calculators for construction estimating, civil and structural work, quantity planning, finishing, infrastructure and property-related calculations.
Each calculator is designed to help with routine estimation, planning and checking tasks. Enter accurate project values, review the units and assumptions, and verify important results against drawings, specifications, applicable standards and current local requirements.
How to use these calculators
Select a calculator, review its input units and enter values from your drawings, measurements, specifications or other reliable sources. Review the assumptions before using the result. For engineering, structural, statutory, tax, property and financial decisions, verify important results against applicable standards, authority requirements and professional advice.
Calculator categories
Available calculators
Showing 51 calculators.
Bar Bending Schedule (BBS) Pro
Rebar cutting length, shape codes and total steel weight in kg/ton.
Open calculator →Civil & ConstructionConcrete & Mortar Estimator
M5–M30 mix design: dry volume, cement bags, sand, aggregate and water.
Open calculator →Civil & ConstructionBrickwork Calculator
Number of bricks, mortar volume, cement and sand for any wall.
Open calculator →Civil & ConstructionPlastering Calculator
Mortar, cement bags and sand for internal/external plaster.
Open calculator →Civil & ConstructionEarthwork & Excavation
Excavation volume, bulked soil, trips and total earthwork cost.
Open calculator →StructuralBeam Concrete & Steel
RCC beam volume, cement/sand/aggregate and steel estimate.
Open calculator →StructuralColumn Concrete & Steel
RCC column volume with rectangular or circular sections.
Open calculator →StructuralSlab Concrete Estimator
Slab volume, materials and steel for one-way/two-way slabs.
Open calculator →StructuralFooting / Foundation Estimator
Isolated footing (PCC + sloped/rectangular pad) concrete quantity.
Open calculator →Real Estate & FinancePlot & Land Area Converter
Sq.Ft, Gaj, Acre, Hectare, Bigha, Biswa, Guntha, Marla, Sq.M.
Open calculator →Real Estate & FinanceStamp Duty & Registration Fee
State and gender dependent stamp duty with registration charges.
Open calculator →Real Estate & FinanceRental Yield & Property ROI
Gross yield, net yield, cash-on-cash return and payback period.
Open calculator →Real Estate & FinanceCarpet / Built-Up & Circle Rate
Carpet, built-up, super built-up areas and circle rate valuation.
Open calculator →Real Estate & FinanceHome Loan EMI & Amortization
EMI, total interest and a year-by-year amortization chart.
Open calculator →Real Estate & FinanceHouse Construction Cost / Sq.Ft
Material, labour and contractor breakdown for turnkey construction.
Open calculator →FinishingTile & Flooring Calculator
Tile count, wastage, adhesive and grout for any floor or wall area.
Open calculator →FinishingPaint & Putty Calculator
Litres of primer, putty and finish paint for interior or exterior walls.
Open calculator →FinishingWaterproofing Estimator
Membrane, coating and chemical quantity for roofs, basements and toilets.
Open calculator →FinishingFalse Ceiling Calculator
Gypsum board, channels, screws and jointing compound per ceiling area.
Open calculator →FinishingWall Putty Coverage
Putty bags, coats and cost for smooth wall finishing.
Open calculator →InfrastructureRoad & Pavement Quantity
GSB, WMM, DBM and BC layer volumes and bitumen for a road stretch.
Open calculator →InfrastructureBox Culvert Quantity
Concrete and steel for RCC box culverts including wing walls.
Open calculator →InfrastructureDrainage & Sewer Line
Trench excavation, bedding, pipe count and backfill for a pipeline.
Open calculator →InfrastructureSeptic Tank Sizing
Tank capacity, dimensions and soak pit sizing per IS 2470.
Open calculator →InfrastructureWater Tank Capacity
Litres, dimensions and demand check for overhead or underground tanks.
Open calculator →Quality ControlField Compaction & Density
Degree of compaction from field dry density against Proctor MDD.
Open calculator →Quality ControlConcrete Cube Test Result
Compressive strength from cube load with IS 456 acceptance check.
Open calculator →Quality ControlSlump & Workability Guide
Slump target, water demand check and workability class per placement.
Open calculator →StructuralSteel Weight & Section Chart
Unit weight and total weight for rebar and structural steel sections.
Open calculator →StructuralLap & Development Length
Tension/compression lap and Ld for a given bar, grade and concrete.
Open calculator →StructuralShuttering / Formwork Area
Contact area, plywood sheets and props for slabs, beams and columns.
Open calculator →StructuralStaircase Quantity & Riser Check
Riser/tread geometry, concrete volume and steel for a flight.
Open calculator →StructuralRetaining Wall Estimator
Concrete, steel and earth pressure check for a cantilever wall.
Open calculator →StructuralPile Foundation Capacity
Concrete volume, steel and indicative bearing capacity per pile.
Open calculator →Quality ControlSafe Bearing Capacity
Terzaghi ultimate and safe bearing capacity for shallow footings.
Open calculator →Real Estate & FinanceBOQ Rate Analysis
Line-item rate build-up with material, labour, overhead and profit.
Open calculator →Real Estate & FinanceLabour & Manpower Planner
Crew size, man-days and wage cost from output norms.
Open calculator →Real Estate & FinanceProject Cash Flow (S-Curve)
Monthly billing, retention and net cash position across a project.
Open calculator →Real Estate & FinanceGST on Property & Works
GST payable on under-construction property and works contracts.
Open calculator →Real Estate & FinanceProperty Tax Estimator
Annual municipal tax from unit area value and usage factors.
Open calculator →Real Estate & FinanceHome Loan Eligibility
Maximum loan from income, FOIR and tenure with affordability check.
Open calculator →Real Estate & FinanceRent vs Buy Analyser
Compare total cost of renting against owning over a holding period.
Open calculator →Real Estate & FinanceFSI / FAR & Coverage
Permissible built-up area, ground coverage and setback check.
Open calculator →Civil & ConstructionBrick vs AAC Block Comparison
Cost, weight and thermal comparison for a wall in brick or AAC.
Open calculator →Civil & ConstructionCement Bag & Volume Converter
Convert between bags, kilograms, cubic metres and cubic feet.
Open calculator →Civil & ConstructionSand & Aggregate Volume
Convert between tonnes, cubic metres, cubic feet and truck loads.
Open calculator →StructuralWall Load on Beam
Dead load per running metre from masonry and plaster on a beam.
Open calculator →StructuralBeam Span / Depth Check
Serviceability depth check against IS 456 span-to-depth limits.
Open calculator →Quality ControlCuring Water Requirement
Water volume and duration for proper concrete curing.
Open calculator →InfrastructureRooftop Solar Sizing
Panel count, roof area, generation and payback for a rooftop plant.
Open calculator →InfrastructureRainwater Harvesting Potential
Harvestable volume, tank sizing and recharge pit capacity.
Open calculator →What you can calculate
Construction & quantity estimation
Estimate common quantities and material requirements for concrete, masonry, plastering, excavation, reinforcement and other construction tasks.
Civil & structural planning
Use selected civil and structural tools for preliminary checks and calculation support. Detailed design should follow applicable drawings, standards, loads, site conditions and professional review.
Finishing & infrastructure
Work through practical calculations related to finishing materials, roads, drainage, water and other infrastructure tasks included in the BTTOTEK calculator collection.
Property & financial estimates
Explore land, property, loan, tax and related estimates. Rates, rules and charges can vary by location and date, so confirm current requirements with the relevant authority or provider.
Before using a result
Check the unit system, dimensions, quantities, rates and other inputs before relying on a result. Some calculations depend on project specifications, material properties, design assumptions or local rules. When a result affects structural safety, construction approval, property transactions, taxation or financial decisions, obtain the appropriate professional or authority verification.
Why use BTTOTEK calculators?
Practical inputs
Enter project dimensions, quantities, rates and other values using the units shown by each calculator.
Faster checking
Use digital calculations to reduce repetitive manual work and make routine estimation checks easier.
Clear verification
Review assumptions and verify important results against drawings, specifications and applicable requirements.
Important verification note
BTTOTEK calculators are intended to make repetitive calculations faster and easier to check. Results depend on the information entered and the assumptions used by each calculator. They are not a substitute for approved drawings, site measurements, engineering certification, legal advice, tax advice or financial advice.
Learn more about BTTOTEK
Learn about the website, contact the team or review the policies that apply when using BTTOTEK calculators.